基于整车路噪性能提升的轮胎优化设计

Optimization Design of Tire for Enhancing Vehicle Road Noise Performance

为提升整车路噪性能,本文中基于虚拟试车场技术和代理模型优化方法对轮胎参数进行了优化。通过集成试验场扫描所得路谱、CDTire轮胎模型和整车声固耦合模型,建立了整车路噪仿真环境。采用最优拉丁超立方采样、Kriging模型和多岛遗传算法构造了优化模型。以轮胎关键物理参数为设计变量,驾驶员外耳声压级均方根为优化目标,测点三向合成加速度均方根为约束,对轮胎进行优化。优化后在测点振动满足要求前提下,整车全频段噪声得到有效改善。

In order to enhance the road noise performance of vehicle,an optimization on tire parameters is conducted in this paper based on virtual proving ground(VPG)technique and metamodel⁃based optimization meth⁃od.The vehicle road noise simulation environment is established through integrating the road spectrum obtained by VPG scanning,CDTire model and vehicle sound⁃structure coupling model.An optimization model is constructed by combining optimal Latin hypercube sampling,Kriging surrogate model and multi⁃island genetic algorithm,with the key physical parameters of tire as design variables,the root mean square of sound pressure level at driver's outer ear as the objective of optimization and the root mean square of three⁃direction resultant acceleration at the measured points as the constraints,an optimization on tire is carried out.After optimization,the vehicle noise in the whole fre⁃quency range is effectively improved while the vibration at the measured points meeting the requirements.