车载式应急桥梁的强度分析和优化

Strength Analysis and Optimization of Vehicle-mounted Emergency Bridge

以某公司的一种车载式应急桥梁为对象,基于有限元方法,采用Abaqus和Hypermesh进行联合仿真。首先建立了桥梁的三维模型并合理简化,转换为有限元模型;其次通过特定工况下的静力分析,计算桥体上的最大等效应力和变形,进行了强度校核;最后对桥梁结构进行了拓扑优化,在保证强度条件下减少桥体体积的15%。分析结果表明应急桥体强度满足要求,实现了结构的轻量化。

The finite element method is used for joint simulation of a vehicle-mounted emergency bridge in a company using Abaqus and Hypermesh. The three-dimensional model of the bridge is established and simplified, and converted into a finite element model. The maximum equivalent stress and deformation on the bridge body are calculated by static analysis under specific working conditions, and the strength check is performed. The topology of the bridge structure is optimized. 15% of the bridge volume is reduced under guaranteed strength conditions. The analysis results show that the strength of the emergency bridge body meets the requirements and the weight of the structure is achieved.