Abstract:

Employing the frequency hardening coefficient in the nonlinear dynamic system consisting of mobile hard disks with rubber isolator, a set of nonlinear differential equations for this system is established. The corresponding model for numerical simulation is constructed. The dynamic responses for different pulse durations and pulse magnitudes of acceleration are computed with this model. The influences of pulse signal parameters on the isolation effect are analyzed and discussed. Theoretical analysis and numerical simulation show that the model presented here is more reasonable than the traditional linear dynamic model. Furthermore, this model is simple and convenience for tation. It can be used to determine the natural frequencies of nonlinear vibration-tion system effectively.

Key words: rubber isolator, nonlinear, semi-sinusoidal impulse, simulation, impulse response

摘要：

在橡胶隔振移动硬盘构成的非线性系统中引入了频率硬化系数，建立了非线性振动微分方程，并构造了相应的仿真计算模型。使用该模型计算了具有不同脉冲加速度幅值和脉冲时间宽度的冲击响应，分析并讨论了脉冲信号参数对隔振效果的影响。理论分析与数值模拟表明：与传统的线性振动模型相比，引入频率硬化系数的橡胶隔振模型更符合实际，且具有良好的冲击响应。仿真模型简单，计算方便，可以用于快速确定非线性隔振系统的固有频率。

关键词: 橡胶隔振器, 非线性, 半正弦脉冲, 仿真, 冲击响应