Browse Publications Technical Papers 2019-01-1418
2019-03-25

Target Setting for the Stiffness of Local Mounting Area in the Vehicle Body for NVH and R&H 2019-01-1418

Performance criterion of local stiffness in BIW for NVH and R&H are presented in this study. A process to develop the local stiffness of the vehicle body has been established for the performances. For R&H performance, not only suspension bush stiffness but local stiffness in BIW structure are important. However, there is no good standard to describe R&H performance using BIW local stiffness. In this paper, a new evaluation standard for local stiffness in BIW is developed and verified considering actual vehicle driving condition for R&H performance. Also, new local stiffness target in BIW for vibration transmissibility is presented. The new stiffness target is developed considering optimal relation between connecting bush stiffness and BIW local stiffness. It is shown that the interior noise of the vehicle is reduced by applying the local stiffness target, which is verified through several cases.

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