不同环境温度下橡胶隔振器振动性能研究

通过振动台对橡胶隔振器施加正弦扫频基础激励,测得了隔振器系统高低温环境下隔振器系统主振方向的动刚度和阻尼比;并分析了计算动刚度和阻尼比的近似公式引起的相对误差。结果表明,随着环境温度的升高,该隔振器的动刚度逐渐降低,阻尼比也逐渐降低。在常温和高温测试结果的处理中,近似公式引起的相对误差在可接受范围内。然而在低温环境下,近似公式引起的相对误差较大,此时建议采用推导的精确公式求解动刚度和阻尼比。

Research on Dynamic Character of Rubber Vibration Isolator within Different Temperature Range

A sine sweep vibration excitation was applied to one type of rubber vibration isolator by vibration table. The dynamic stiffness and damping ratio of the isolator in the major vibrating direction within different temperature range were measured. The relative errors caused from approximate formulas for calculating the dynamic stiffness and damping ratio were analyzed. The results showed that the dynamic stiffness and damping ratio of the isolator declined gradually along with the increasing of environment temperature. The relative errors caused from approximate formulas were acceptable within normal and high temperature range. However, the relative errors were relatively large in low temperature. To accurately calculate the dynamic stiffness and damping ratio, improved method was derived in this paper.