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以装载机板焊驱动桥壳为研究对象,首先建立桥壳的有限元分析模型,然后运用有限元分析软件ANSYS对其进行强度分析,建立残余应力-疲劳强度修正数学模型,并将运用X射线残余应力测试技术测量所得的桥壳残余应力通过修正数学模型进行强度分析的结果修正,最后将强度修正结果导入根据基于残余应力修正的应力-寿命数学模型编制的名义应力法和局部应力应变法疲劳寿命计算软件中,对桥壳的疲劳寿命进行求解,所得结果与桥壳疲劳寿命台架试验数据较为接近,表明通过基于残余应力修正疲劳强度原理的装载机板焊桥壳疲劳寿命分析方法增加了分析数据的可靠性。
In this paper, the finite element analysis model of the axle housing is established firstly, and then the strength analysis of the axle housing is carried out by using the finite element analysis software ANSYS. The mathematical model of the residual stress-fatigue strength correction is established. The X-ray Residual stress test technology to measure the resulting bridge shell residual stress through the revised mathematical model for strength analysis of the results of the amendment, and finally the strength correction results were imported based on residual stress correction of stress - life mathematical model prepared by the nominal stress method and the local stress-strain fatigue Life calculation software, the fatigue life of the axle housing is solved, and the results obtained are close to the fatigue life test data of the axle housing, which shows that the method of fatigue life analysis based on the fatigue strength principle of the loader plate welding axle housing based on the residual stress increases Analyze the reliability of the data.