基于粘弹性阻尼层随机性自由阻尼层板简谐响应分析

Analysis of harmonic response of unconstrained damped plate based on randomness of viscoelastic damping layer

基于粘弹性阻尼层材料参数和几何参数的随机性,用MonteCarlo直接抽样法对自由阻尼层板的简谐响应进行了分析研究.分别考察了粘弹性材料的贮存模量、损耗因子以及阻尼层厚度的随机性对复合结构简谐响应的振幅和相位差的影响.计算结果表明,共振时阻尼层的随机性对振幅和相位差的影响很大,非共振时影响不大.

The analysis of the harmonic response of the unconstrained damped plate based on randomness of viscoelastic damping layer is studied using Monte Carlo method. The random variable is normal distribution in this analysis. The influences of real modulus and loss factor of viscoelastic material and thickness of damping layer on the amplitude and the phase of structural response are analyzed. Numerical examples show that the influence of randomness of damping layer is very notable at resonant frequency.