Structural vibration response prediction based on Blocked force method

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (21) : 126-131.

LIU Niansi1, WENG Jiansheng1, ZHENG Zijian2

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Abstract

Vibration-noise source characteristics recognition is an important task in development of automobiles.Here, aiming at limitations of acquiring excitation in traditional transfer path analysis (TPA) method, a novel TPA method based on the Blocked force method was proposed to directly measure equivalent force and replace excitation source for structural vibration analysis.The Blocked force method was derived theoretically to verify the correctness of its theory.The method was used to study the structure-borne noise problem caused by working excitation of an electronic brake booster(EBB).Results showed that vibration responses of its front panel predicted with this method agree well with measured values in tests; the engineering feasibility of the proposed method is verified;the study results provide a theoretical basis for the optimization of EBB structure-borne noise in vehicle development.

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transfer path analysis / structure-borne noise / Blocked force / response prediction

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LIU Niansi1, WENG Jiansheng1, ZHENG Zijian2. Structural vibration response prediction based on Blocked force method[J]. Journal of Vibration and Shock, 2020, 39(21): 126-131

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