Transfer path two-level modeling for cab vibration based on OPAX method

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (3) : 72-78.

CHEN Jian, DENG Zhi-qiang, ZENG Wei-jun, SHU Hong-chao, LI Shi-ai, RONG Fang-ming

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Abstract

The basic theory of OPAX method was presented, and transfer path analysis (TPA) for a medium-sized truck cab vibration was done. A two-level TPA model including a powertrain-cab 1st level TP model and a frame-cab 2nd level TP model based on OPAX method was proposed according to structural design features of the truck. The dynamic stiffness, operating load and path contribution of various mount components were obtained with tests and calculations. They were used to correctly judge causes of the cab’s higher vibration level and propose an improved scheme to effectively reduce the cab’s vibration level. The results showed that the improved two-level TPA model can more fit the structure design of the study object and reflect the structure path characteristics in detail; the new model enriches and extends the existing TPA model and provides a reference for the application of OPAX method.

Key words

vehicle NVH / transfer path analysis(TPA) / two-level modeling of TPA / load identification / contribution analysis

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CHEN Jian, DENG Zhi-qiang, ZENG Wei-jun, SHU Hong-chao, LI Shi-ai, RONG Fang-ming. Transfer path two-level modeling for cab vibration based on OPAX method[J]. Journal of Vibration and Shock, 2018, 37(3): 72-78

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