Research on the Vibration-isolating Performance of Hollow-square-steel Blocking Mass based on the Hybrid FE-SEA Method#br#
The basic principle of the FE-SEA hybrid method was expounded, and the sheet structural model with blocking masses was built based on FEM, SEA and FE-SEA hybrid method separately. By designing the model experiment of sheet structural with approximate equal-mass hollow beam and solid beam, the predicted results of above three different methods were verified by experiment. By defining the parameter △ that the ratio of characteristic dimension to wavelength, each control frequency domain was found. The results showed that adopting the parameter △as the index of dividing each effective frequency domain was effective. Within the range of 8 kHz, the total vibration-isolating performance with hollow blocking mass was nearly 10dB higher than that with solid blocking mass. Especially in mid-high frequency, the vibration-isolating effect was much obvious. However, the vibration-isolating performance with hollow blocking mass was worse compared with solid blocking mass under 125Hz. The above analyses showed the hollow blocking mass had a better application prospect than solid blocking mass.
Institute of Noise and Vibration, Jiangsu University of Science and Technology, Zhenjiang, 212003, China
Abstract：The basic principle of the FE-SEA hybrid method was expounded, and the sheet structural model with blocking masses was built based on FEM, SEA and FE-SEA hybrid method separately. By designing the model experiment of sheet structural with approximate equal-mass hollow beam and solid beam, the predicted results of above three different methods were verified by experiment. By defining the parameter △ that the ratio of characteristic dimension to wavelength, each control frequency domain was found. The results showed that adopting the parameter △as the index of dividing each effective frequency domain was effective. Within the range of 8 kHz, the total vibration-isolating performance with hollow blocking mass was nearly 10dB higher than that with solid blocking mass. Especially in mid-high frequency, the vibration-isolating effect was much obvious. However, the vibration-isolating performance with hollow blocking mass was worse compared with solid blocking mass under 125Hz. The above analyses showed the hollow blocking mass had a better application prospect than solid blocking mass.
温华兵，彭子龙，刘林波. 基于FE-SEA混合法的空心阻振质量阻振性能研究[J]. 振动与冲击, 2015, 34(5): 174-178.
WEN Huabing, PENG Zilong,LIU Linbo . Research on the Vibration-isolating Performance of Hollow-square-steel Blocking Mass based on the Hybrid FE-SEA Method#br#. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(5): 174-178.
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