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Sensitivity Analysis of NVH Structure of Car Body Based on Modal Analysis

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3D Imaging Technologies—Multidimensional Signal Processing and Deep Learning

Part of the book series: Smart Innovation, Systems and Technologies ((SIST,volume 236))

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Abstract

Taking a certain brand of car as an example, a finite element model of the sound cavity of the body and the passenger compartment was established. By combining the modal analysis with the acoustic structure coupling of the cabin and the passenger compartment, the sound pressure response is used to analyze the coupled vibration mode of the cabin structure and the indoor acoustic cavity, and the indoor noise level is analyzed. The main sources of internal noise are analyzed through structural sensitivity identification. In addition, this article proposes an improved scheme to effectively reduce the noise inside the vehicle. This article is based on a household SUV. Through modal analysis and dynamic frequency response analysis, the internal noise caused by structural vibration is studied, and suggestions for improving the body parts are put forward to reduce the internal noise level.

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Acknowledgements

This project is supported by National Natural Science Foundation of China (Grant No. U1934202).

This project is supported by National Natural Science Foundation of China (Grant No. 51975485).

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Correspondence to Yongqiang Liu .

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Liu, Y., Liu, X., Dou, L., Luan, Y., Shi, L., Zheng, G. (2021). Sensitivity Analysis of NVH Structure of Car Body Based on Modal Analysis. In: Jain, L.C., Kountchev, R., Tai, Y. (eds) 3D Imaging Technologies—Multidimensional Signal Processing and Deep Learning. Smart Innovation, Systems and Technologies, vol 236. Springer, Singapore. https://doi.org/10.1007/978-981-16-3180-1_11

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