One of type of vibration.

1. AERODYNAMIC & HYDRAULIC
VIBRATION
PRESENTED BY :
• ANDITO DWISEPTIADI (15/385721/TK/44103)
• STEFANUS YUDHA PRASETYA (15/385261/TK/43923)
• WENMAS ARDYA IIFTIHAR (15/385262/TK/43924)

2. AERODYNAMIC & HYDRAULIC VIBRATION
It is one of the type of the vibration. Hydraulic or aerodynamic
forces - combined into a single category since they are similar in
nature and involve moving a fluid. This vibration occurs in
compressor and pump. It can be caused by pulsation of fluid flow or
pressure in the system. The effect of these vibration include vane or
blade pass frequency, cavitation, recirculation, internal clearance
problems and flow turbulence. These vibration will make some noise
and unbalancing the system, so it can damage the parts in the
system too.

3. TYPES
In a hydraulic plunger pump, the pulsation of flow and pressure are
two of the leading reasons for vibration. Flow pulsation refers to the
instantaneous flow variation when a hydraulic pump is running. When
a hydraulic pump keeps operating continuously, the ever-changing
sealing volume is expected to be generated in a majority of hydraulic
pumps.
Flow pulsation inevitably gives rise to pressure pulsation, which
indicates that the flow and pressure output from the hydraulic
plunger pump change with time.

5. • The instantaneous actual flow of a hydraulic plunger pump may be
given as follows.

6. According to the fundamental principles of fluid dynamics, the
change of the flow in the closed cavity between the plunger and
cylinder block of a hydraulic plunger pump inevitably leads to a
pressure change. With respect to a compressible flow, its
instantaneous pressure can be represented by the following formulas.

9. CHARACTERISTICS
In aerodynamic & hydraulic Vibration, there are some characteristics
as follows :
• The Increasing of excitation frequency
• Strain and stress that cause resonant frequency
• The effect of acceleration in the system

10. CAUSES
There are some causes in aerodynamic & hydraulic vibration :
• Vibration in hydraulic plunger pump
• Vibration in motorcycle engine (the motion of piston)
• Vibration in vehicle suspension
• Vibration in tube system
• Vibration in High Pressure Blowers and Compressors

11. SPECTRUM
The analysis of aerodynamic & hydraulic vibration is to find the
causes and the solutions by comparing some variables that related to
the system. In this system we can compare some of the amplitude
that occur in it at all possible frequencies.
With this analysis, we can get the natural frequency of the
system. It can be used to determine whether the part of the system is
still in good condition or not. The condition also determine the
quality and the effectiveness of the system. So we can make sure that
the system is working in good condition or not.

12. TERIMA KASIH