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Zeta 消声器出口位置选择
及声源透射计算
实例
2R&D Technical Review - LAMBDA Project - Confidential
声学模型
Shell 模型
材料参数 :
Parts shell Shell 内腔体
弹性模量 1.6E5 MPa 声速 225 m/s
密度 7150 kg/m3 密度 1.555 kg/m3
Shell 内腔体模型
3R&D Technical Review - LAMBDA Project - Confidential
Shell 内腔体声模态
模态阶次 频率 Hz 模态阶次 频率 Hz 模态阶次 频率 Hz
1 585.012 8 1224.474 15 1661.952
2 653.95 9 1299.913 16 1684.927
3 688.97 10 1406.653 17 1700.669
4 1024.349 11 1433.695 18 1819.312
5 1038.397 12 1502.801 19 1897.753
6 1096..031 13 1558.323 20 1949.039
7 1125.639 14 1605.556 21 1978.373
频率范围: 20-2000Hz
4R&D Technical Review - LAMBDA Project - Confidential
声模态振型
Mode 1 585.012Hz Mode 2 653.95Hz
Mode 3 688.97Hz Mode 4 1024.349Hz
5R&D Technical Review - LAMBDA Project - Confidential
Shell 结构模态振型
Mode 1 3398.84 Hz
Mode 2 3865.965Hz Mode 3 3923.774Hz
模态阶次 频率 Hz
1 3398.840
2 3865.965
3 3923.774
6R&D Technical Review - LAMBDA Project - Confidential
耦合声场声压分布
580Hz 590Hz
650Hz 660Hz
7R&D Technical Review - LAMBDA Project - Confidential
耦合声场声压分布
680Hz 690Hz
1020Hz 1030Hz
8R&D Technical Review - LAMBDA Project - Confidential
调整声源位置
声源位置 9 声源位置 10
声源位置 11 声源位置 12
9R&D Technical Review - LAMBDA Project - Confidential
国标指定场点的计算结果
频率范围: 300-800Hz
10R&D Technical Review - LAMBDA Project - Confidential
结果对比
频率范围: 630Hz 频段
11R&D Technical Review - LAMBDA Project - Confidential
结果对比
说明:
用这个方法来模拟计算压缩机消音器设计中消音器管路和出口位置,一
次性解决两个问题,可以大大压缩设计周期。
后期实验和该计算结果相吻合,疗效不错。

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消声器辐射噪声分析

  • 2. 2R&D Technical Review - LAMBDA Project - Confidential 声学模型 Shell 模型 材料参数 : Parts shell Shell 内腔体 弹性模量 1.6E5 MPa 声速 225 m/s 密度 7150 kg/m3 密度 1.555 kg/m3 Shell 内腔体模型
  • 3. 3R&D Technical Review - LAMBDA Project - Confidential Shell 内腔体声模态 模态阶次 频率 Hz 模态阶次 频率 Hz 模态阶次 频率 Hz 1 585.012 8 1224.474 15 1661.952 2 653.95 9 1299.913 16 1684.927 3 688.97 10 1406.653 17 1700.669 4 1024.349 11 1433.695 18 1819.312 5 1038.397 12 1502.801 19 1897.753 6 1096..031 13 1558.323 20 1949.039 7 1125.639 14 1605.556 21 1978.373 频率范围: 20-2000Hz
  • 4. 4R&D Technical Review - LAMBDA Project - Confidential 声模态振型 Mode 1 585.012Hz Mode 2 653.95Hz Mode 3 688.97Hz Mode 4 1024.349Hz
  • 5. 5R&D Technical Review - LAMBDA Project - Confidential Shell 结构模态振型 Mode 1 3398.84 Hz Mode 2 3865.965Hz Mode 3 3923.774Hz 模态阶次 频率 Hz 1 3398.840 2 3865.965 3 3923.774
  • 6. 6R&D Technical Review - LAMBDA Project - Confidential 耦合声场声压分布 580Hz 590Hz 650Hz 660Hz
  • 7. 7R&D Technical Review - LAMBDA Project - Confidential 耦合声场声压分布 680Hz 690Hz 1020Hz 1030Hz
  • 8. 8R&D Technical Review - LAMBDA Project - Confidential 调整声源位置 声源位置 9 声源位置 10 声源位置 11 声源位置 12
  • 9. 9R&D Technical Review - LAMBDA Project - Confidential 国标指定场点的计算结果 频率范围: 300-800Hz
  • 10. 10R&D Technical Review - LAMBDA Project - Confidential 结果对比 频率范围: 630Hz 频段
  • 11. 11R&D Technical Review - LAMBDA Project - Confidential 结果对比 说明: 用这个方法来模拟计算压缩机消音器设计中消音器管路和出口位置,一 次性解决两个问题,可以大大压缩设计周期。 后期实验和该计算结果相吻合,疗效不错。