地震载荷下家用救生舱的瞬态动力学分析

Transient dynamic analysis of the family refuge chamber under the seismic load

针对家用救生舱舱体的整体抗震性能对其结构稳定性及舱内人员安全的直接影响,利用ANSYS Workbench有限元软件对一种家用救生舱的舱体进行了瞬态动力学分析,得到了舱体位移形变云图。借助于位移形变云图分析地震过程中舱体的最大位移形变以及响应的时间点,判断舱体是否满足设计要求,找出了舱体的薄弱环节并提出了改进意见。建立了一个多目标优化设计模型,将救生舱舱体厚度、加强筋尺寸作为优化变量,将救生舱质量、最大等效应力和最大总形变量作为优化目标,利用Pro/E与AWE协同优化技术对舱体进行了优化,并对优化后的救生舱重新进行了瞬态动力学模拟分析。研究结果表明,优化后的救生舱整体强度和刚度均得以提高,对家用救生舱的设计和抗震能力的评价具有理论指导意义。

Aiming at the direct effect of family refuge chamber cabin＇s anti-seismic performance on the structural stability and safety of the trapped inside,transient dynamic analysis of the cabin was analyzed by ANSYS Workbench finite element software based on the trait of seismic load. According to the displacement nephogram of the cabin,the maximum displacement and its response time was analyzed which could verify if the cabin meet the need of design. Further the weak part of cabin was found and the suggestion for improvement was adopted. The cabin thickness and the stiffener sizes were chosen as variables. The quality,the maximum stress and the maximum total deformation were chosen as optimization objective. So the multi-objective optimization model was built. Finally the cabin was optimized by Pro / E and AWE cosimulation optimization and optimized structure was analyzed again by transient dynamic analysis. The analyzing results indicate that both the strength and stiffness of the optimized structure are improved effectively. The research is valuable and helpful for the rescue capsule design and the anti-impact ability evaluation.