Virtual vibration test rig for fatigue analysis of dozer push arms  

作　　者：Lei Hou Weibin Li Wenyan Gu Zizheng Sun Xiangqian Zhu Jin-Hwan Choi 

机构地区：[1]Key Laboratory of High-Efficiency and Clean Mechanical Manufacture of MOE,National Demonstration Center for Experimental Mechanical Engineering,School of Mechanical Engineering,Shandong University,Jinan,China [2]Rizhao Research Institute of Shandong University,Rizhao,China [3]School of Aerospace Engineering,Xiamen University,Xiamen,China [4]School of Qilu Transportation,Shandong University,Jinan,China [5]Department of Mechanical Engineering,Kyunghee University,Seoul,South Korea

出　　处：《International Journal of Mechanical System Dynamics》2024年第3期278-291,共14页国际机械系统动力学学报（英文）

基　　金：Shandong Province Science and Technology SMES innovation ability improvement project and Rizhao Key Research and Development Project,Grant/Award Number:2022TSGC2504;National Natural Science Foundation of China,Grant/Award Number:52378402;Shandong Provincial Natural Science Foundation Youth Project,Grant/Award Numbers:ZR2022QE021,ZR202211100077;Taishan Scholar Project,Grant/Award Number:tsqn202312024。

摘　　要：To obtain accurate fatigue life results for construction machinery components,acquiring load spectra is crucial,as their authenticity and validity directly determine the precision of the analysis.In working conditions,component attitudes change continuously,but they remain static on the vibration test rig(VTR),so the acquired target signals should match with the actual component attitudes in the driving signal generation.This paper proposes an efficient and economical simulation-based virtual VTR for fatigue analysis of dozers.First,the relationship between the push arm rotation angle and the cylinder stroke is established,since the cylinder strokes can be measured easily in data acquisition experiments.Second,load decomposition is used to determine the attitude relationship between virtual VTR conditions and actual conditions,and target signals are calculated based on this attitude relationship and measured data.According to the system's frequency response function,the driving signals are iterated until the system's response signals converge with the target signals.Finally,the iteratively obtained load spectra are utilized for fatigue life analysis.The results show that the virtual VTR can effectively and accurately obtain the results of fatigue analysis and has engineering application significance.

关 键 词：virtual vibration test rig driving signal generation component attitudes fatigue analysis dozer push arm 

分 类 号：TH11[机械工程—机械设计及理论]