Dynamic analysis and structure optimization on trapezoidal wave generator for eliminating the over deviation of the residual wave in shock test measurement

Wen, Jingjing, Yao, Houpu, Wu, Bin, Ji, Ze ORCID: https://orcid.org/0000-0002-8968-9902, Wen, Lihua, Xu, Man, Jin, Yi and Yan, Xunliang 2021. Dynamic analysis and structure optimization on trapezoidal wave generator for eliminating the over deviation of the residual wave in shock test measurement. Measurement 182 , 109665. 10.1016/j.measurement.2021.109665

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Abstract

In this work, a new separate-style trapezoidal wave generator (TWG) is designed to alleviate the over deviation of residual waves in trapezoidal shock waveform generation processes. Firstly, a hypothesis is proposed that this over deviation is caused by the impact between the piston and the end cover of the TWG by analyzing the dynamic behavior of the TWG during shock tests, and, subsequently, verified with finite element simulation. Then, a dynamic model is established to describe the impact behavior between the piston and the end cover based on the 1D continuous rod theory. Several parameters, including the impact velocity, the attached mass, the piston weight, the stiffness of the inner cushion, the piston rod length, and the piston rod diameter, are analyzed to estimate this impact behavior. Lastly, the separate-style TWG is designed by implementing a simple and effective modification on the traditional TWG in accordance with the parameters’ analysis.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	Elsevier
ISSN:	0263-2241
Date of First Compliant Deposit:	7 June 2021
Date of Acceptance:	25 May 2021
Last Modified:	07 Nov 2023 06:30
URI:	https://orca.cardiff.ac.uk/id/eprint/141775

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