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针对目前悬挂系统设计理论的不足,运用工程力学中的卡氏第二定理和莫尔法求出负重轮行程与所 受载荷之间的理论关系,并考虑了平衡肘的变截面对应力状态的影响,进而得到系统内关键点处的应力值;在理 论分析的基础上,由简单到复杂,分别建立了初步模型、修正模型和最终的实体模型。应用有限元软件对悬挂系 统进行三维数值模拟,计算了悬挂系统的应力场和位移场。理论分析和数值模拟的结果表明:悬挂系统力学模型 较好地描述了悬挂系统的实际情况;有限元计算模型对于扭杆式悬挂系统强度计算非常有效,所得应力集中区与 实际失效情况基本一致;应用本研究结果,可对悬挂系统作进一步的疲劳分析。
Aiming at the shortcomings of the current suspension system design theory, the theoretical relationship between the load-bearing and the stroke of the overhead traveling wheel is obtained by applying the second Karzman’s theorem in mechanics of mechanics and the Mohr’s law, and considering the stress state of the variable section of balance elbow And then get the stress value at the key point in the system. Based on the theoretical analysis, the preliminary model, the revision model and the final solid model are established respectively from simple to complex. The finite element software is used to carry out three-dimensional numerical simulation of the suspension system, and the stress field and displacement field of the suspension system are calculated. The results of theoretical analysis and numerical simulation show that the mechanical model of the suspension system can describe the actual situation of the suspension system well. The finite element model is very effective for the strength calculation of the torsion bar suspension system. The stress concentration area obtained is basically consistent with the actual failure situation. Application of the results of this study, the suspension system for further fatigue analysis.