颗粒阻尼器损耗因子外因特性研究

Study on External Features of Particle Damping Loss Factor

对稳态能量流法测量阻尼损耗因子的原理进行了推导,采用稳态能量流法对某型颗粒阻尼器的阻尼损耗因子进行了实验研究。对粘贴有该颗粒阻尼器的钢板进行了振动仿真分析与实验相结合的研究,验证了稳态能量流法测量损耗因子方法的正确性。实验结果表明,该颗粒阻尼器的阻尼损耗因子随加速度变化呈现明显的"分段表征"特性,随频率变化呈现明显的"山脊"特性。对颗粒阻尼器表现出该特性的原因进行了理论分析。

The principle of steady-state energy flow method to measure the damping loss factor was derived.Through this method,a certain type of particle damper damping loss factor was carried on the experimental study.The vibration simulation of steel plate which was pasted with particle damper was compared with experimental research.The experimental results of the steady-state energy flow method show that,the particle damper damping loss factors vary with the changes of acceleration and present the obvious＂piecewise representation＂features.At the same time,the damping loss factors vary with the changes of the frequency and present the obvious＂ridge＂features.The reasons of these features were analyzed in theory.