【摘要】 为了改善车用散热器易损区域应力分布状态,以21XHP系列散热器为研究对象,通过三维建模、有限元求解等方法对散热器易损区域分析,结果表明,散热器水室两侧加强筋、主片两侧、扁管和主片焊接部位为应力集中区域。并模拟散热器实际工况进行压力交变实验,实验结果表明,仿真所得散热器易损区域分布与实验结果相符,提出对散热器水室两侧加强筋加高加宽、主片加厚、翅片加密等解决方案。最后采用两参数威布尔分布对失效散热器实验数据进行分析,得出散热器失效阶段属于早期耗损故障期,为散热器材料出现高周疲劳所致,需提高材料的屈服强度,减少腐蚀介质等。更多还原

【Abstract】 In order to improve the stress distribution in the vulnerable area of the radiator, the radiator products of the 21 XHP series, as the research object, the vulnerable area of the radiator was analyzed using 3 D modeling and finite element analysis. Simulation results show that the vulnerable areas are near the stiffeners on both sides of the tank, on both sides of the header, the position of the tube and the welding parts of the header. Then the alternating pressure experiments to radiators were carried out to simulate the actual working conditions and the result showed that the finite element analysis conformed to reality. Furthermore, specific solutions were proposed to solve the problems, such as heightening and widening the tank, adding fins and thickening the header and so on. The two-parameter Weibull distribution was also used to analyze the failure of radiators. Data indicated that the failure time of radiators belonged to the early wear failure period, which was caused by high-cycle fatigue of radiator material. The yield strength of materials should be increased and the corrosion medium reduced.更多还原