弹性元件动刚度测量台架设计及优化

Design and optimization of dynamic stiffness measuring bench for elastic elements

为测量弹性减振元件传递动刚度,基于ISO 10846系列标准中的间接法测量原理,设计弹性减振元件传递动刚度测量台架;针对给定的有效测试频率上、下限确定阻滞质量块;基于有效测试条件,得到解耦弹簧选取依据。利用建立的台架试验研究某型挠性接管传递动刚度,测量结果在200~300 Hz频段内出现非正常波动。建立测量台架的有限元分析模型,数值研究表明,该波动是由于阻滞质量块与解耦弹簧之间的整体式过渡板存在局部模态。因此,对测量台架进行优化设计,结果表明,采用非整体式过渡结构可有效消除测量台架对测试结果的影响。

In order to measure the dynamic transfer stiffness of elastic vibration dampers,based on the indirect method measurement principle in ISO 10846 series standards,a dynamic transfer stiffness measurement bench of elastic damping elements was designed.Block mass was determined for a given effective test frequency;decoupling spring was selected based on effective test conditions.A study was performed on dynamic transfer stiffness of a certain type of flexible pipe by the established measuring bench.Measurement results show that the abnormal fluctuation occurs in the frequency band of 200-300 Hz.A finite element analysis model of the measurement bench was established,and numerical studies show that the fluctuation is due to the local mode of the integral transition plate between the block mass and the decoupling spring.Therefore,the optimization design of measuring bench was conducted.Results show that the non-integral transition structure can effectively eliminate the influence of the measurement bench on the test results.