弹性基础上的双层隔振结构声辐射的主动控制

孙瑶1,杨铁军1,沈颖2,黄迪1,吴磊1,徐阳1

振动与冲击 ›› 2016, Vol. 35 ›› Issue (9) : 197-203.

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (9) : 197-203.
论文

弹性基础上的双层隔振结构声辐射的主动控制

  • 孙瑶1,杨铁军1,沈颖2,黄迪1,吴磊1,徐阳1
作者信息 +

Active noise control of the flexible base of a two-stage vibration isolation system

  • Sun Yao1, Yang Tie-jun1, Shen Ying2, Huang Di1, Wu Lei1, Xu Yang1
Author information +
文章历史 +

摘要

本文采用阻抗导纳法建立了以弹性矩形板为基础的双层主动隔振系统数学模型。以基础向外的声辐射为控制对象,探讨不同前馈控制策略的声辐射主动控制效果。分别选取两种面向振动及两种面向声辐射的控制性能函数,考察施加控制后弹性基础的辐射声功率,并综合考虑声压分布及控制力幅值等参数对控制效果进行全面地分析比较,进而评价各控制策略的优劣。结果表明,由于结构振动的耦合作用,面向振动的控制策略会恶化某些频段基础向外的辐射声功率,而直接面向声辐射的控制策略则可能会以放大振动响应或需要大的控制力为代价。最后,本文还对控制力作用位置对控制效果的影响进行了探讨。

Abstract

In order to evaluate control performances of different feed-forward strategies for sound radiated from the flexible base of a two-stage vibration isolation system, a mathematical model of a two-stage vibration isolation system mounting on a rectangular plate was established. Two vibration and two sound radiation oriented cost functions were chosen and the acoustic radiation power after control was focused. Besides, the control performances were comprehensively discussed by taking parameters like sound pressure distribution, and control force into account. Then the advantages and disadvantages of different control strategies were evaluated. The simulation results show that the vibration oriented control strategies could induce the increase of radiated power at specific frequencies while the control performance of sound radiation oriented strategies may be obtained with enlarging vibration power and large control force amplitude. In addition, the effect of the location of control force on sound radiation was discussed.

关键词

双层隔振 / 弹性基础 / 声辐射 / 主动控制

Key words

two-stage vibration isolation;flexible base / sound radiation / active control

引用本文

导出引用
孙瑶1,杨铁军1,沈颖2,黄迪1,吴磊1,徐阳1. 弹性基础上的双层隔振结构声辐射的主动控制[J]. 振动与冲击, 2016, 35(9): 197-203
Sun Yao1, Yang Tie-jun1, Shen Ying2, Huang Di1, Wu Lei1, Xu Yang1. Active noise control of the flexible base of a two-stage vibration isolation system[J]. Journal of Vibration and Shock, 2016, 35(9): 197-203

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