Improved operational transfer path analysis

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (12) : 196-202.

LIAO Xuhui,DAI Xudong,CHEN Lele,LIAO Lianying,MENG Haodong,ZHAO Jingbo

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Abstract

Transfer path analysis (TPA) provides a good way to solve many vibration and noise problems in engineering, but it also has the disadvantages of low efficiency and tedious testing process.As an improved TPA method, OTPA (operational transfer path analysis) is favorable in the industry due to its advantages of simple operation and high test efficiency.However, OTPA reduces test accuracy although it can improve test efficiency.In addition, the definition of the transfer path in OTPA is very different from classical TPA.In order to improve the existing OTPA, a novel method that uses the differences of coupling point responses between the active and passive sides to replace the reference point responses was proposed.Theoretical analysis and an experiment both show that the proposed method can improve the test accuracy of OTPA without additional work.More importantly, the physical meaning of the transfer path in the proposed method is consistent with that in the classical TPA.

Key words

operational transfer path analysis / transmissibility / response / singular value decomposition / artificial excitation

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LIAO Xuhui,DAI Xudong,CHEN Lele,LIAO Lianying,MENG Haodong,ZHAO Jingbo. Improved operational transfer path analysis[J]. Journal of Vibration and Shock, 2021, 40(12): 196-202

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