矩 形 截 面 阻 振 质 量 隔 振 效 果 分 析

摘　要：基于能量法建立了矩形截面阻振质量-平板结构的振动分析模型，利用Rayleigh-Ritz方法对结构在外部载荷作用下的动力学响应进行计算。分析了单级阻振质量、多级阻振质量和矩形环路阻振质量带的隔振性能，以及阻振质量的结构参数对其隔振性能的影响。计算和分析结果表明，结构受到中高频激励时，阻振质量对振动的隔离效果显著；增加阻振质量的重量、阻振质量重量不变的情况下增加截面高度可以提高阻振质量的隔振量。

Analysis on vibration isolation performance of isolation mass with rectangular cross section

Based on the energy method,the vibration analysis model of a plate structure attached with rectangular cross section vibration isolation masses was developed.By utilizing Rayleigh-Ritz method,the dynamic responses of the structure under external load were calculated.The isolation characteristics of single step arranged isolation mass,several steps arranged isolation masses and rectangular loop isolation masses band were discussed.The effects of structural parameters of isolation mass on its vibration isolation performance were also discussed.Computation and analysis results show that,the isolation effect of isolation mass is significant when the structure is under middle or high frequencies excitation.The vibration isolation performance can be improved by increasing the isolation mass or the section height with no mass change.