基于灵敏度分析中心组合设计的乘用车发动机舱温度场优化

doi:10.19562/j.chinasae.qcgc.2020.03.006

Abstract

Abstract: Aiming at the overheat problem of a car driving shaft shroud, an optimization on the temperature field in engine compartment is conducted based on sensitivity analysis and central composite design method. Firstly, the CFD simulation of engine compartment is performed to find out the causes. Then, the main influencing factors are found by sensitivity analysis. Next, model for predicting the surface temperature of driving shaft shroud is established using central composite design method and quadratic regression equation, and the optimal combination of main influencing factors are found. Finally simulation and real vehicle test are carried out for verification. The results indicate that the surface temperature of driving shaft shroud reduces to below the limit value, effectively solving its overheat problem

Key words: underhood temperature field, sensitivity analysis, central composite design, simulation, test

Wang Qidong, Zhang Jie, Zhang Min. Sensitivity Analysis and Central Composite Design[J].Automotive Engineering, 2020, 42(3): 315-322.

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Sensitivity Analysis and Central Composite Design

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