Tire parameter optimization method based on improvement of road noise performance of whole vehicle

Abstract

The invention provides a tire parameter optimization method based on improvement of road noise performance of a whole vehicle. The tire parameter optimization method comprises the following steps: calculating NVH road surface power spectral density; establishing a real physical tire model; building a whole vehicle acoustic-solid coupling model; obtaining vehicle noise and vibration response underan initial design scheme of a tire; constructing a tire model sample pool; constructing a display mathematic relation between key physical parameters of the tire and full-band noise and vibration response of a whole vehicle measuring point; defining and solving a tire optimization problem to obtain a measuring point noise response optimization value; linearizing a tire model corresponding to an optimal design scheme, and then performing simulation to obtain a whole vehicle measuring point noise and vibration response simulation result; generating supplementary sample points and adding the supplementary sample points into the tire model sample pool; and calculating an error between the full-band noise optimization value and the simulation value of the whole vehicle measuring point. A tire key physical parameter optimization design oriented to NVH improvement of the whole vehicle road noise is effectively realized, tire trial-manufacture turns and whole vehicle road test times are reduced, cost is saved, and a research and development period is shortened.

Description

technical field [0001] The invention belongs to the technical field of automobile NVH, and in particular relates to a method for optimizing tire parameters based on improvement of vehicle road noise performance. Background technique [0002] The NVH (Noise, Vibration, Harshness) performance of an automobile is the most direct feeling of the user to the vehicle product. Its level reflects the manufacturing quality of the automobile and determines the market trend of the product. The NVH issue has always been one of the key concerns of the domestic and foreign automotive industries. Among them, the road noise is due to the vibration and noise generated by the tires being excited by the unevenness of the road surface at about 5-60 Hz, which is transmitted to the interior of the car and mainly generated by the body panels. sense. For electric vehicles, due to the absence of engine excitation noise, the contribution of road noise to the vehicle noise level is more prominent. T...

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Problems solved by technology

However, the current research mainly examines the NVH characteristics of the tire itself, such as natural frequency and damping ratio, from the perspectives of tire structure and operating conditions, and fails to establish a relationship between the tire and the road noise response of the vehicle. How to quantify the adjustment of key physical parameters of the tire for the vehicle The contribution of vibration and noise reduction to assist tire design is yet to be studied

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