ICAFIS - SỔ TAY HƯỚNG DẪN THỰC HÀNH TRÁCH NHIỆM XÃ HỘI CHO KHỐI TÀU CÁ VIỆT NAMLap Dinh
Tài liệu này là sản phẩm của Dự án “Thúc đẩy thực hành trách nhiệm xã hội (CSR) trong chuỗi cung ứng khai thác thủy sản Việt Nam” do Trung tâm Hợp tác Quốc tế Nuôi trồng và Khai thác thủy sản bền vững (ICAFIS) tổ chức thực hiện, và được hỗ trợ bời OXFAM.
ICAFIS - SỔ TAY HƯỚNG DẪN THỰC HÀNH TRÁCH NHIỆM XÃ HỘI CHO KHỐI TÀU CÁ VIỆT NAMLap Dinh
Tài liệu này là sản phẩm của Dự án “Thúc đẩy thực hành trách nhiệm xã hội (CSR) trong chuỗi cung ứng khai thác thủy sản Việt Nam” do Trung tâm Hợp tác Quốc tế Nuôi trồng và Khai thác thủy sản bền vững (ICAFIS) tổ chức thực hiện, và được hỗ trợ bời OXFAM.
2024 State of Marketing Report – by HubspotMarius Sescu
https://www.hubspot.com/state-of-marketing
· Scaling relationships and proving ROI
· Social media is the place for search, sales, and service
· Authentic influencer partnerships fuel brand growth
· The strongest connections happen via call, click, chat, and camera.
· Time saved with AI leads to more creative work
· Seeking: A single source of truth
· TLDR; Get on social, try AI, and align your systems.
· More human marketing, powered by robots
ChatGPT is a revolutionary addition to the world since its introduction in 2022. A big shift in the sector of information gathering and processing happened because of this chatbot. What is the story of ChatGPT? How is the bot responding to prompts and generating contents? Swipe through these slides prepared by Expeed Software, a web development company regarding the development and technical intricacies of ChatGPT!
Product Design Trends in 2024 | Teenage EngineeringsPixeldarts
The realm of product design is a constantly changing environment where technology and style intersect. Every year introduces fresh challenges and exciting trends that mold the future of this captivating art form. In this piece, we delve into the significant trends set to influence the look and functionality of product design in the year 2024.
How Race, Age and Gender Shape Attitudes Towards Mental HealthThinkNow
Mental health has been in the news quite a bit lately. Dozens of U.S. states are currently suing Meta for contributing to the youth mental health crisis by inserting addictive features into their products, while the U.S. Surgeon General is touring the nation to bring awareness to the growing epidemic of loneliness and isolation. The country has endured periods of low national morale, such as in the 1970s when high inflation and the energy crisis worsened public sentiment following the Vietnam War. The current mood, however, feels different. Gallup recently reported that national mental health is at an all-time low, with few bright spots to lift spirits.
To better understand how Americans are feeling and their attitudes towards mental health in general, ThinkNow conducted a nationally representative quantitative survey of 1,500 respondents and found some interesting differences among ethnic, age and gender groups.
Technology
For example, 52% agree that technology and social media have a negative impact on mental health, but when broken out by race, 61% of Whites felt technology had a negative effect, and only 48% of Hispanics thought it did.
While technology has helped us keep in touch with friends and family in faraway places, it appears to have degraded our ability to connect in person. Staying connected online is a double-edged sword since the same news feed that brings us pictures of the grandkids and fluffy kittens also feeds us news about the wars in Israel and Ukraine, the dysfunction in Washington, the latest mass shooting and the climate crisis.
Hispanics may have a built-in defense against the isolation technology breeds, owing to their large, multigenerational households, strong social support systems, and tendency to use social media to stay connected with relatives abroad.
Age and Gender
When asked how individuals rate their mental health, men rate it higher than women by 11 percentage points, and Baby Boomers rank it highest at 83%, saying it’s good or excellent vs. 57% of Gen Z saying the same.
Gen Z spends the most amount of time on social media, so the notion that social media negatively affects mental health appears to be correlated. Unfortunately, Gen Z is also the generation that’s least comfortable discussing mental health concerns with healthcare professionals. Only 40% of them state they’re comfortable discussing their issues with a professional compared to 60% of Millennials and 65% of Boomers.
Race Affects Attitudes
As seen in previous research conducted by ThinkNow, Asian Americans lag other groups when it comes to awareness of mental health issues. Twenty-four percent of Asian Americans believe that having a mental health issue is a sign of weakness compared to the 16% average for all groups. Asians are also considerably less likely to be aware of mental health services in their communities (42% vs. 55%) and most likely to seek out information on social media (51% vs. 35%).
AI Trends in Creative Operations 2024 by Artwork Flow.pdfmarketingartwork
This article is all about what AI trends will emerge in the field of creative operations in 2024. All the marketers and brand builders should be aware of these trends for their further use and save themselves some time!
A report by thenetworkone and Kurio.
The contributing experts and agencies are (in an alphabetical order): Sylwia Rytel, Social Media Supervisor, 180heartbeats + JUNG v MATT (PL), Sharlene Jenner, Vice President - Director of Engagement Strategy, Abelson Taylor (USA), Alex Casanovas, Digital Director, Atrevia (ES), Dora Beilin, Senior Social Strategist, Barrett Hoffher (USA), Min Seo, Campaign Director, Brand New Agency (KR), Deshé M. Gully, Associate Strategist, Day One Agency (USA), Francesca Trevisan, Strategist, Different (IT), Trevor Crossman, CX and Digital Transformation Director; Olivia Hussey, Strategic Planner; Simi Srinarula, Social Media Manager, The Hallway (AUS), James Hebbert, Managing Director, Hylink (CN / UK), Mundy Álvarez, Planning Director; Pedro Rojas, Social Media Manager; Pancho González, CCO, Inbrax (CH), Oana Oprea, Head of Digital Planning, Jam Session Agency (RO), Amy Bottrill, Social Account Director, Launch (UK), Gaby Arriaga, Founder, Leonardo1452 (MX), Shantesh S Row, Creative Director, Liwa (UAE), Rajesh Mehta, Chief Strategy Officer; Dhruv Gaur, Digital Planning Lead; Leonie Mergulhao, Account Supervisor - Social Media & PR, Medulla (IN), Aurelija Plioplytė, Head of Digital & Social, Not Perfect (LI), Daiana Khaidargaliyeva, Account Manager, Osaka Labs (UK / USA), Stefanie Söhnchen, Vice President Digital, PIABO Communications (DE), Elisabeth Winiartati, Managing Consultant, Head of Global Integrated Communications; Lydia Aprina, Account Manager, Integrated Marketing and Communications; Nita Prabowo, Account Manager, Integrated Marketing and Communications; Okhi, Web Developer, PNTR Group (ID), Kei Obusan, Insights Director; Daffi Ranandi, Insights Manager, Radarr (SG), Gautam Reghunath, Co-founder & CEO, Talented (IN), Donagh Humphreys, Head of Social and Digital Innovation, THINKHOUSE (IRE), Sarah Yim, Strategy Director, Zulu Alpha Kilo (CA).
Trends In Paid Search: Navigating The Digital Landscape In 2024Search Engine Journal
The search marketing landscape is evolving rapidly with new technologies, and professionals, like you, rely on innovative paid search strategies to meet changing demands.
It’s important that you’re ready to implement new strategies in 2024.
Check this out and learn the top trends in paid search advertising that are expected to gain traction, so you can drive higher ROI more efficiently in 2024.
You’ll learn:
- The latest trends in AI and automation, and what this means for an evolving paid search ecosystem.
- New developments in privacy and data regulation.
- Emerging ad formats that are expected to make an impact next year.
Watch Sreekant Lanka from iQuanti and Irina Klein from OneMain Financial as they dive into the future of paid search and explore the trends, strategies, and technologies that will shape the search marketing landscape.
If you’re looking to assess your paid search strategy and design an industry-aligned plan for 2024, then this webinar is for you.
5 Public speaking tips from TED - Visualized summarySpeakerHub
From their humble beginnings in 1984, TED has grown into the world’s most powerful amplifier for speakers and thought-leaders to share their ideas. They have over 2,400 filmed talks (not including the 30,000+ TEDx videos) freely available online, and have hosted over 17,500 events around the world.
With over one billion views in a year, it’s no wonder that so many speakers are looking to TED for ideas on how to share their message more effectively.
The article “5 Public-Speaking Tips TED Gives Its Speakers”, by Carmine Gallo for Forbes, gives speakers five practical ways to connect with their audience, and effectively share their ideas on stage.
Whether you are gearing up to get on a TED stage yourself, or just want to master the skills that so many of their speakers possess, these tips and quotes from Chris Anderson, the TED Talks Curator, will encourage you to make the most impactful impression on your audience.
See the full article and more summaries like this on SpeakerHub here: https://speakerhub.com/blog/5-presentation-tips-ted-gives-its-speakers
See the original article on Forbes here:
http://www.forbes.com/forbes/welcome/?toURL=http://www.forbes.com/sites/carminegallo/2016/05/06/5-public-speaking-tips-ted-gives-its-speakers/&refURL=&referrer=#5c07a8221d9b
ChatGPT and the Future of Work - Clark Boyd Clark Boyd
Everyone is in agreement that ChatGPT (and other generative AI tools) will shape the future of work. Yet there is little consensus on exactly how, when, and to what extent this technology will change our world.
Businesses that extract maximum value from ChatGPT will use it as a collaborative tool for everything from brainstorming to technical maintenance.
For individuals, now is the time to pinpoint the skills the future professional will need to thrive in the AI age.
Check out this presentation to understand what ChatGPT is, how it will shape the future of work, and how you can prepare to take advantage.
A brief introduction to DataScience with explaining of the concepts, algorithms, machine learning, supervised and unsupervised learning, clustering, statistics, data preprocessing, real-world applications etc.
It's part of a Data Science Corner Campaign where I will be discussing the fundamentals of DataScience, AIML, Statistics etc.
Time Management & Productivity - Best PracticesVit Horky
Here's my presentation on by proven best practices how to manage your work time effectively and how to improve your productivity. It includes practical tips and how to use tools such as Slack, Google Apps, Hubspot, Google Calendar, Gmail and others.
The six step guide to practical project managementMindGenius
The six step guide to practical project management
If you think managing projects is too difficult, think again.
We’ve stripped back project management processes to the
basics – to make it quicker and easier, without sacrificing
the vital ingredients for success.
“If you’re looking for some real-world guidance, then The Six Step Guide to Practical Project Management will help.”
Dr Andrew Makar, Tactical Project Management
2024 State of Marketing Report – by HubspotMarius Sescu
https://www.hubspot.com/state-of-marketing
· Scaling relationships and proving ROI
· Social media is the place for search, sales, and service
· Authentic influencer partnerships fuel brand growth
· The strongest connections happen via call, click, chat, and camera.
· Time saved with AI leads to more creative work
· Seeking: A single source of truth
· TLDR; Get on social, try AI, and align your systems.
· More human marketing, powered by robots
ChatGPT is a revolutionary addition to the world since its introduction in 2022. A big shift in the sector of information gathering and processing happened because of this chatbot. What is the story of ChatGPT? How is the bot responding to prompts and generating contents? Swipe through these slides prepared by Expeed Software, a web development company regarding the development and technical intricacies of ChatGPT!
Product Design Trends in 2024 | Teenage EngineeringsPixeldarts
The realm of product design is a constantly changing environment where technology and style intersect. Every year introduces fresh challenges and exciting trends that mold the future of this captivating art form. In this piece, we delve into the significant trends set to influence the look and functionality of product design in the year 2024.
How Race, Age and Gender Shape Attitudes Towards Mental HealthThinkNow
Mental health has been in the news quite a bit lately. Dozens of U.S. states are currently suing Meta for contributing to the youth mental health crisis by inserting addictive features into their products, while the U.S. Surgeon General is touring the nation to bring awareness to the growing epidemic of loneliness and isolation. The country has endured periods of low national morale, such as in the 1970s when high inflation and the energy crisis worsened public sentiment following the Vietnam War. The current mood, however, feels different. Gallup recently reported that national mental health is at an all-time low, with few bright spots to lift spirits.
To better understand how Americans are feeling and their attitudes towards mental health in general, ThinkNow conducted a nationally representative quantitative survey of 1,500 respondents and found some interesting differences among ethnic, age and gender groups.
Technology
For example, 52% agree that technology and social media have a negative impact on mental health, but when broken out by race, 61% of Whites felt technology had a negative effect, and only 48% of Hispanics thought it did.
While technology has helped us keep in touch with friends and family in faraway places, it appears to have degraded our ability to connect in person. Staying connected online is a double-edged sword since the same news feed that brings us pictures of the grandkids and fluffy kittens also feeds us news about the wars in Israel and Ukraine, the dysfunction in Washington, the latest mass shooting and the climate crisis.
Hispanics may have a built-in defense against the isolation technology breeds, owing to their large, multigenerational households, strong social support systems, and tendency to use social media to stay connected with relatives abroad.
Age and Gender
When asked how individuals rate their mental health, men rate it higher than women by 11 percentage points, and Baby Boomers rank it highest at 83%, saying it’s good or excellent vs. 57% of Gen Z saying the same.
Gen Z spends the most amount of time on social media, so the notion that social media negatively affects mental health appears to be correlated. Unfortunately, Gen Z is also the generation that’s least comfortable discussing mental health concerns with healthcare professionals. Only 40% of them state they’re comfortable discussing their issues with a professional compared to 60% of Millennials and 65% of Boomers.
Race Affects Attitudes
As seen in previous research conducted by ThinkNow, Asian Americans lag other groups when it comes to awareness of mental health issues. Twenty-four percent of Asian Americans believe that having a mental health issue is a sign of weakness compared to the 16% average for all groups. Asians are also considerably less likely to be aware of mental health services in their communities (42% vs. 55%) and most likely to seek out information on social media (51% vs. 35%).
AI Trends in Creative Operations 2024 by Artwork Flow.pdfmarketingartwork
This article is all about what AI trends will emerge in the field of creative operations in 2024. All the marketers and brand builders should be aware of these trends for their further use and save themselves some time!
A report by thenetworkone and Kurio.
The contributing experts and agencies are (in an alphabetical order): Sylwia Rytel, Social Media Supervisor, 180heartbeats + JUNG v MATT (PL), Sharlene Jenner, Vice President - Director of Engagement Strategy, Abelson Taylor (USA), Alex Casanovas, Digital Director, Atrevia (ES), Dora Beilin, Senior Social Strategist, Barrett Hoffher (USA), Min Seo, Campaign Director, Brand New Agency (KR), Deshé M. Gully, Associate Strategist, Day One Agency (USA), Francesca Trevisan, Strategist, Different (IT), Trevor Crossman, CX and Digital Transformation Director; Olivia Hussey, Strategic Planner; Simi Srinarula, Social Media Manager, The Hallway (AUS), James Hebbert, Managing Director, Hylink (CN / UK), Mundy Álvarez, Planning Director; Pedro Rojas, Social Media Manager; Pancho González, CCO, Inbrax (CH), Oana Oprea, Head of Digital Planning, Jam Session Agency (RO), Amy Bottrill, Social Account Director, Launch (UK), Gaby Arriaga, Founder, Leonardo1452 (MX), Shantesh S Row, Creative Director, Liwa (UAE), Rajesh Mehta, Chief Strategy Officer; Dhruv Gaur, Digital Planning Lead; Leonie Mergulhao, Account Supervisor - Social Media & PR, Medulla (IN), Aurelija Plioplytė, Head of Digital & Social, Not Perfect (LI), Daiana Khaidargaliyeva, Account Manager, Osaka Labs (UK / USA), Stefanie Söhnchen, Vice President Digital, PIABO Communications (DE), Elisabeth Winiartati, Managing Consultant, Head of Global Integrated Communications; Lydia Aprina, Account Manager, Integrated Marketing and Communications; Nita Prabowo, Account Manager, Integrated Marketing and Communications; Okhi, Web Developer, PNTR Group (ID), Kei Obusan, Insights Director; Daffi Ranandi, Insights Manager, Radarr (SG), Gautam Reghunath, Co-founder & CEO, Talented (IN), Donagh Humphreys, Head of Social and Digital Innovation, THINKHOUSE (IRE), Sarah Yim, Strategy Director, Zulu Alpha Kilo (CA).
Trends In Paid Search: Navigating The Digital Landscape In 2024Search Engine Journal
The search marketing landscape is evolving rapidly with new technologies, and professionals, like you, rely on innovative paid search strategies to meet changing demands.
It’s important that you’re ready to implement new strategies in 2024.
Check this out and learn the top trends in paid search advertising that are expected to gain traction, so you can drive higher ROI more efficiently in 2024.
You’ll learn:
- The latest trends in AI and automation, and what this means for an evolving paid search ecosystem.
- New developments in privacy and data regulation.
- Emerging ad formats that are expected to make an impact next year.
Watch Sreekant Lanka from iQuanti and Irina Klein from OneMain Financial as they dive into the future of paid search and explore the trends, strategies, and technologies that will shape the search marketing landscape.
If you’re looking to assess your paid search strategy and design an industry-aligned plan for 2024, then this webinar is for you.
5 Public speaking tips from TED - Visualized summarySpeakerHub
From their humble beginnings in 1984, TED has grown into the world’s most powerful amplifier for speakers and thought-leaders to share their ideas. They have over 2,400 filmed talks (not including the 30,000+ TEDx videos) freely available online, and have hosted over 17,500 events around the world.
With over one billion views in a year, it’s no wonder that so many speakers are looking to TED for ideas on how to share their message more effectively.
The article “5 Public-Speaking Tips TED Gives Its Speakers”, by Carmine Gallo for Forbes, gives speakers five practical ways to connect with their audience, and effectively share their ideas on stage.
Whether you are gearing up to get on a TED stage yourself, or just want to master the skills that so many of their speakers possess, these tips and quotes from Chris Anderson, the TED Talks Curator, will encourage you to make the most impactful impression on your audience.
See the full article and more summaries like this on SpeakerHub here: https://speakerhub.com/blog/5-presentation-tips-ted-gives-its-speakers
See the original article on Forbes here:
http://www.forbes.com/forbes/welcome/?toURL=http://www.forbes.com/sites/carminegallo/2016/05/06/5-public-speaking-tips-ted-gives-its-speakers/&refURL=&referrer=#5c07a8221d9b
ChatGPT and the Future of Work - Clark Boyd Clark Boyd
Everyone is in agreement that ChatGPT (and other generative AI tools) will shape the future of work. Yet there is little consensus on exactly how, when, and to what extent this technology will change our world.
Businesses that extract maximum value from ChatGPT will use it as a collaborative tool for everything from brainstorming to technical maintenance.
For individuals, now is the time to pinpoint the skills the future professional will need to thrive in the AI age.
Check out this presentation to understand what ChatGPT is, how it will shape the future of work, and how you can prepare to take advantage.
A brief introduction to DataScience with explaining of the concepts, algorithms, machine learning, supervised and unsupervised learning, clustering, statistics, data preprocessing, real-world applications etc.
It's part of a Data Science Corner Campaign where I will be discussing the fundamentals of DataScience, AIML, Statistics etc.
Time Management & Productivity - Best PracticesVit Horky
Here's my presentation on by proven best practices how to manage your work time effectively and how to improve your productivity. It includes practical tips and how to use tools such as Slack, Google Apps, Hubspot, Google Calendar, Gmail and others.
The six step guide to practical project managementMindGenius
The six step guide to practical project management
If you think managing projects is too difficult, think again.
We’ve stripped back project management processes to the
basics – to make it quicker and easier, without sacrificing
the vital ingredients for success.
“If you’re looking for some real-world guidance, then The Six Step Guide to Practical Project Management will help.”
Dr Andrew Makar, Tactical Project Management
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
Xường đóng tàu
1. Môn học : Xưởng đóng tàu
Kích thước và kết cấu đường triền
Đoàn Đình Tuyết Trang
GVHD:
SVTH: Lê Anh Khoa
Đỗ Đăng Triển
2. Các kích thước cơ bản của triền
I. Độ dốc i II. Độ sâu mút III. Chiều dài
đường triền đường triền đường triền
MNCTK
Ho MNHT
i
Hm
L
3. I. Độ dốc i đường triền:
Phụ thuộc chủ yếu vào địa hình và địa chất và
hệ thống cơ khí
Loại đường triền Độ dốc i
Triền ngang a.Tàu 100-250t 1:8–1:4
1 : 12 – 1 : 8
b. Tàu <1000t
Triền dọc a. Tàu 100-250t 1 : 6 - 1 : 10
b. Tàu ≤ 1000t 1: 10 – 1 : 14
c. Tàu ≥ 1000t 1 : 14 – 1 : 20
4. II Chiều sâu mút đường triền
• a) Triền dọc xe giá bằng
• b) Triền dọc xe giá nghiêng
• c) Triền ngang 3 tầng xe
• d) Triền ngang 2 tầng xe
• e) Triền ngang ray lệch trên mái 2 tầng xe
• g) Triền ngang ray lệch trên mặt bãi, 2 tầng xe
5. a) Triền dọc xe giá bằng
• Chiều sâu mút:
Hm = T + k + ax + Lxsina
: mớn nước hạ thủy (không tải)
k : Độ sâu dự trữ giữa đệm tàu đáy tàu và chiều cao đệm kê
Lx = (0.85 0.9)Lt :Chiều dài xe giá
MNHT MNCTK
Ho
T
k
Hm Lxsin
ax
6. b) Triền dọc xe giá nghiêng
Hm = T + k + ∑ai
∑ai = at+ac
at :chiều cao xe đường triền lấy ở mép ngoài
ac : Chiều cao xe chở tàu
ac
at
7. c) Triền ngang 3 tầng xe
Hm = T + k + a’ + a” + a”’ + Lxsina
Hb
T
k
a’’’
a”
a’
Lx
8. d) Triền ngang 2 tầng xe
Hm = T + k + at + ac + Lxsin
Hb
T
k
a”
Hm
a’
Lx
9. e) Triền ngang ray lệch trên mái 2
tầng xe
Hm = T + k + hx1 + hx2 +iB/2
T
k
hx1
Hm
hx2
iB/2
10. III. Chiều dài đường triền
• Triền ngang
L= (Hm+Hp)/i
MNHT MNCTK
Hp
Hm
L
11. III. Chiều dài đường triền
• Triền ngang: L= (Hm+Hp-a)/i
MNHT
MNCTK Ho
Hb
a”
Hm
12. Kết cấu đường triền
• Tùy thuộc vào nền đuờng tốt hay xấu :
• Có 3 loai kết cấu
• Ray trên tà vẹt đá dăm
• Ray trên dầm BTCT trên nền đá balat
• Ray trên dầm BTCT trên nền cọc
13. Ray trên nền tà vẹt đá dăm
Ưu : Khuyết
Ray
Giá thành thấp Độ lún lớn
Lớp đá dễ bị xói
Thi công nhanh
Kết cấu đơn giản Tà vẹt dễ bị xâm thực (nếu
Bulong
bằng gỗ)
Chịu lực kém
Cóc kẹp ray
Tà vẹt
Đá dăm
Kết luận
Thích hợp với đia chất tương đối tốt
14. Ray trên dầm BTCT nền balat
Ray
Bulong
Cóc kẹp ray
Tà vẹt
Đá dăm
Dầm BTCT
Balat đáy
16. Tính toán các bộ phận của triền tàu
• 1.Sự phân bố của tải trọng của tàu xuống
đường trượt
Xe chở tàu
Ray
Tà vẹt
Đệm kê
17. Phân bố tải trọng lên đường trượt
• Phức tạp
Tàu được coi như dầm liên tục có độ cứng thay
đổi trên các gối đàn hồi
Các gối này đặt lên dầm cố định ( xe )
Dầm (xe) này đặt trên gối dàn hồi ( bánh xe )
Bánh tỳ và lăn trên ray có độ cứng không đổi
Kê
Đường ray và tà vẹt đặt vào nền TÀU
Ray Xe
18. Theo chiều dọc
Phía mũi
m
0.5m
Phía lái
40%
31% 29%
Lt/3 Lt/3 Lt/3
m= 1.2Q/Lt
Q tải trong ha thủy =1/3 lượng dãn nước
1.2 hệ số không đều
19. Theo phương ngang
TH1
• Xe giá bằng 1 tầng, phân đoạn theo chiều dọc
• Xe chạy trên 3 ray
• Các ray trùng đệm tàu
– Q là trọng lượng hạ thủy của tàu = 1/3 lượng giãn nước
0.25Q
0.25Q 0.17Q 0.17Q
0.65Q Q
Xe
20. TH2
• Chia thành 3 phân đoạn
• nhọn đáy
• bằng đáy
0.65Q
0. 5Q
0.25Q 0.25Q
21. TH3
• 2 Tầng xe
tầng dưới liên tục chay trên 3 ray
tầng trên là 3 dãy xe
=> Đáy bằng
=> Đáy nhọn 0. 5Q
0.65Q 0.25Q
0.25Q
22. TH3 (tt)
Theo chiều dọc
Phía mũi
m
0.5m
Phía lái
40%
31% 29%
Lt/3 Lt/3 Lt/3
m1= 1.2Ri/Lt
Ri tải trong ứng với từng dãy
1.2 hệ số không đều
23. Tính số xe phân đoạn
• Thực tế thường biết trước được sức chở của xe
nên số xe phân đoạn
KQ
Z=
[P]
K: 1,25-> 2,5 hệ số không đều
Q :trong lượng hạ thủy của tàu
[P] : sức chở của 1 xe
24. Tính toán áp lực lên từng bánh xe
mo·K’·l1
≤ [Pk ]
Pk =
n·r
m = (k + k1 + k2 + k3)m
ki là tỷ số trọng lượng của xe tầng I so với tàu
· K’ : hệ số phân bố tải trọng không dều giữ các bánh xe
· n : số bánh xe
· r = 2 số đường ray trong một tổ ray
· l1 : chiều dài 1 phân đoạn xe
· [Pk] : tải cho phép trên 1 bánh
25. Tính toán triền tính theo sơ đồ dầm đàn
-Ray
• Ray trên nền tà vẹt đá dăm:
hồi theo phương pháp hệ số
– Xe truyền lực xuống ray qua hệ thống bánh xe
nền.
– Ray kê trên tà vẹt đặt đều nhau – Lực tác dụng là hệ thống lực
tập trung di động
Tà vẹt được đặt trên lớp đá
dăm,chịu lực từ ray truyền
qua, thường mỗi tà vẹt chỉ kê một
hoặc hai ray
Tính như dầm ngắn, lực tác dụng
là lực tập trung từ ray truyền
xuông
26. • Cách tính toán phương pháp hệ số nền xem
trong sách nền móng
• Độ võng:
y = -KPKj/2
• Moment uốn :
M=PKy/4K
• Lực cắt
Q=-PKq/2
27. • Trong đó
• j = e-Kx(sinKx + cosKx)
• y = e-Kx(sinKx + cosKx)
• d = e-KxcosKx
• K= 4
4 EJ
ab
• : hệ số chống uốn của ta
u=C
l
vẹt
28. Ray trên dầm BTCT
• Ray không chịu lực chỉ dùng dẫn hướng
• Dầm BTCT chiu hoàn toàn tải trọng
• Chiều dài tính toán lấy theo khoảng cách 2 khe
lún
29. Ray trên dầm BTCT
• các bước tính toán:
• Tính áp lực bánh xe Pk
• Tính độ lún đơn vị yi và yQ
• Tính lực cắt đầu dầm Q
• Dùng Gorbunov Poxadov tính P, Q,M
• Tây dựng các biểu đồ theo phản lực P, bao
lực cắt Q, bao momen M
• Tính toán độ bền và bố trí cốt thép cho dầm
đường ray BTCT
30. Sơ đồ tính toán
Pk(y 1+ y2 + y3 + y4)- Qyp= Qyp
Trong đó :
Pk : do bánh xe truyền qua
yi : độ lún do Pk = 1
yp : độ lún do Qp = 1
Lực cắt đầu dầm do ngoai lực gây ra
Pk ( y1 y2 y3 y4 )
Q
2yp
PK PK PK PK
Q
Q
31. Triền có ray trên nền cọc
Tính toán nhu dầm liên tục nhiều nhịptren gối cứng hoặc đàn
hồi
Cọc
Dầm trên các
gối cứng
Dầm trên các gối
có độ cứng
EF
K= L
N coc
32. Tính toán các yếu tố phụ
• Kiểm tra ổn dịnh của hệ tàu và xe
• Tính lực kéo tác dụng lên xe
• Tính lực kéo tính toán và công suất của bàn tời
• Tính puli
• Tính ổn định của bệ puli và hệ tời
33. • Nhóm thực hiện
Lê Anh Khoa
Đỗ Đăng Triển
Hết
Xin Cảm ơn Cô và các bạn quan tâm theo dõi