扭杆式坦克悬挂系统的强度分析

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.

Strength Analysis on Torsion Bar Suspension System of Tank

A suspension system is the important part of a tank or an armored vehicle. However, there is a high attrition or failure rate of the suspension system of some tanks. Therefore, strength on the suspension system of tanks is analyzed in this paper. Aiming to a shortcoming of the available design theory of the suspension system, the relation between displacement and loading on the loaded wheel is obtained by applying the second Castigli-ano theorem and Mohr method in engineering mechanics and by considering the effect of variable section of the balance elbow on the stress state. Furthermore, the stress on a key point is given. Based on theoretical analysis, a simplified, an improved and a practical models are established step by step and the finite element software is used for the 3-D numerical simulation. The stress and the displacement fields of suspension system are computed. The results of theoretical analysis and the numerical simulation show that the mechanical model describes the suspension system reliably and the model of finite element is very effective to the strength computation of the suspension system. The regions of stress concentration obtained agree well with the practical failure ones. By using the numerical results, further fatigue analysis can be implemented.