动态密封状态下汽车风噪性能不确定性研究

doi:10.19562/j.chinasae.qcgc.2021.11.010

Abstract

Abstract:

The analysis and optimization methods of interval uncertainty of vehicle interior wind noise performance under dynamic seal condition are proposed in this paper. Firstly， the statistical energy model of the vehicle is established， the wind noise loads after spectrum decomposition are applied onto the model to complete the calculation of interior wind noise. Then， the transmission losses of sealing strips under different compression conditions are measured， and the upper and lower bounds of the transmission losses of sealing strips are calculated according to the change of the compression amounts of sealing strips during vehicle driving to fulfill the description of uncertain variables. Finally， based on interval perturbation theory， the variation range of interior wind noise pressure level is analyzed， a robust optimization model is established， and the central value and the radius of the perturbation interval of wind noise pressure level are optimized. The results of calculation examples show that the method proposed can reduce the interior noise level and its fluctuation amplitude on the premise of ensuring the mass of relevant parts basically unchanged， apparently enhancing the robustness of the system.

Key words: dynamic seal, wind noise, interval model, uncertainty

Zuofeng Pan,Yuwei Deng,Yaodong Hao,Lili Su,Jianghua Deng. Study on Uncertainty of Vehicle Wind Noise Performance Under Dynamic Seal Condition[J].Automotive Engineering, 2021, 43(11): 1645-1652.

Figures/Tables 16

参数	优化前	优化后
$a 1$ /%	40	8
$a 2$ /%	42	80
$a 3$ /%	38	66
$a 4$ /%	75	80
$a 5$ /%	45	42
$t 1$ / mm	4	4.6
$t 2$ / mm	4	3.2

References 12

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项目	压缩量下限/mm	压缩量上限/mm
前门车门密封条	3.2	5.0
前门车身密封条	1.5	3.0
后门车门密封条	4.2	5.0
后门车身密封条	2.4	3.0

参数	数值
种群规模	24
遗传代数	40
交叉概率	0.9
交叉分布指数	10.0
突变分布指数	20.0

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Study on Uncertainty of Vehicle Wind Noise Performance Under Dynamic Seal Condition

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