Design and optimization of dynamic stiffness measuring bench for elastic elements

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (12) : 326-332.

GONG Jingfeng, YANG Yangyang, XUAN Lingkuan, LIU Zhen

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Abstract

In order to measure the dynamic transfer stiffness of elastic vibration dampers. Based on the indirect method measurement principle in ISO 10846 series standards, the dynamic transfer stiffness measurement bench of elastic damping elements is designed. Determination of block mass for a given effective test frequency; selection of decoupling spring based on effective test conditions. Study on dynamic transfer stiffness of a certain type of flexible pipe by the established measuring bench. The measurement results show that the abnormal fluctuation occurs in the frequency band of 200 Hz ~ 300 Hz. A finite element analysis model of the measurement bench is 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. The results show that the non-integral transition structure can effectively eliminate the influence of the measurement bench on the test results.

Key words

elastic element / flexible pipe / indirect method / dynamic transfer stiffness / bench design

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GONG Jingfeng, YANG Yangyang, XUAN Lingkuan, LIU Zhen. Design and optimization of dynamic stiffness measuring bench for elastic elements[J]. Journal of Vibration and Shock, 2023, 42(12): 326-332

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