基于振动响应的隔振系统力传递率间接估算方法

摘要

In engineering, vibration level difference and force transmissibility are usually utilized to evaluate the performance of isolation systems. Vibration level difference can be readily derived from the responses measured at the top and the bottom of the isolator, while there are lots of obstacles in force measurement. In this paper, based on the known vibration responses at both ends of the isolator, an indirect method was proposed that can be applied to obtain the excitation force of the vibrating machines and the force transmission of the isolator. Numerical results are presented to validate the effectiveness of the proposed method. Compared with the direct measurement by means of force sensors, this method is a more concise, and can ensure the accuracy for force transmission estimation.%工程中，常用振级落差和力传递率来表征隔振系统的隔振效果。振级落差可以由实验测得的隔振器上下端的振动响应，直接计算获取；相比之下，直接测量系统力在实际应用中存在诸多难点。为此，提出一种间接估算方法，以隔振器两端的振动响应作为输入，设备激励力及隔振器传递力，并通过有限元模型对该方法的正确性做出验证。相比于使用力传感器直接进行实验测试，该方法更为简洁，且能够对力传递率做出准确的估算，具有一定的工程实用价值。