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机械约束对缸盖热疲劳模拟试验的影响

, PP. 1450-1454

Keywords: 动力机械工程,发动机缸盖,机械约束,热疲劳试验,热应力对比试验

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Abstract:

为研究机械约束对缸盖热状态的影响,自行搭建了可以进行带机械约束的缸盖热疲劳模拟试验台,并以某型号的缸盖为例进行了有机械约束和无机械约束的缸盖热疲劳对比试验。试验结果表明:未施加机械约束的缸盖应力测点最大热应力相对误差比有机械约束高20%,平均相对误差则高于10%,说明在缸盖热疲劳模拟试验研究中机械约束的影响是不可忽视的。

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