CAJ | 학술논문

连杆在发动机工作过程中承受复杂的载荷.通过运动学和动力学分析获得连杆的载荷和边界条件,建立有限元模型.将复杂的连杆载荷分解为预紧工况、装配工况、爆压工况和惯性工况实施有限元计算,对其各种指标进行评价.将预紧工况、装配工况和惯性工况计算结果叠加,评价杆身与大头盖接触面的压力分布.最后采用基于有限元计算结果的疲劳分析方法获得连杆的疲劳安全因子分布,评价其疲劳特性.根据分析结果对连杆进行改进,获得了良好的效果.实践证明,该方法能有效地指导连杆的设计工作.
련간재발동궤공작과정중승수복잡적재하.통과운동학화동역학분석획득련간적재하화변계조건,건립유한원모형.장복잡적련간재하분해위예긴공황、장배공황、폭압공황화관성공황실시유한원계산,대기각충지표진행평개.장예긴공황、장배공황화관성공황계산결과첩가,평개간신여대두개접촉면적압력분포.최후채용기우유한원계산결과적피로분석방법획득련간적피로안전인자분포,평개기피로특성.근거분석결과대련간진행개진,획득료량호적효과.실천증명,해방법능유효지지도련간적설계공작.
Linkage bears complex dynamic loads during the running of engine.Therefore, it' s very useful to predict the fatigue strength of linkage using simulation method in the process of concept design.Loads and boundary conditions of linkage are concluded by using kinematics and dynamics analysis, and then a finite element model is constructed.Several simulation cases are performed, and the results are evaluated separately and combined to predict the stiffness and strength of linkage.Finally, fatigue strength analysis is performed based on FEA results.The method turns out to be very effective in practice.