作　　者： (刘刚）; (王悦东）; (方吉）; (王剑）;

机构地区： 大连市大连交通大学交通运输工程学院,辽宁省116028

出　　处： 《农业装备与车辆工程》 2017年第9期25-30,共6页

摘　　要： 为分析焊接结构在动态载荷下的疲劳强度,基于ANSYS瞬态分析的动态结构应力计算方法 ,充分考虑其自身振动对焊缝寿命的影响,施加交变载荷,利用有限元分析软件ANSYS进行瞬态响应分析,获得其动态结构应力,再根据主S-N曲线疲劳预测理论获得焊接结构的疲劳寿命。对比分析静态载荷作用下的焊接结构在BS标准和美国ASME标准计算得到的焊接结构疲劳寿命,动态结构应力法能更准确预测焊缝的疲劳寿命。 In order to analyze the fatigue strength of welded structures under dynamic loading, based on the dynamic structural stress calculation method of ANSYS transient analysis, we need to give full consideration to the impact of its vibration on weld life. The finite element analysis software ANSYS is applied to analyze the transient vibration, and the dynamic structure stress is obtained. Then the fatigue life of welded structure is obtained by using the theory of the fatigue prediction of the main S-N curve. Comparative analysis of the fatigue life of welded structures calculated and obtained under static loading respectively in the BS standard and the ASME standard of the United States shows that the dynamic structural stress method is more close to the real situation, more feasible.

关 键 词： 焊接结构 瞬态分析 动态结构应力 主 曲线