自动扶梯桁架结构的有限元轻量化分析

针对自动扶梯式电梯在安全性能和轻量化设计上的矛盾,首先,运用有限元方法计算了原设计中自动扶梯的结构强度和刚度性能,分析了原设计中存在的不足；然后,结合结构参数对性能影响的灵敏度分析,提出了结构改进设计的主要对象；最后,在改善结构强度和刚度性能的基础上,应用优化设计技术对电梯桁架结构的板材厚度进行了优化分析.研究结果表明,重新设计后的电梯桁架结构的强度提高了21.1％,刚度提高了24.6％,极大地改善了结构性能；同时,结构质量减轻了7.2％,取得了轻量化的效果.

Lightweight analysis of automatic escalator truss structure with FEM

Aiming at the contradictions of the escalator elevator safety performance and lightweight design, escalator structural intensity and stiffness characteristics were firstly analyzed and validated by the finite element method. The problems in the original design were found. Then, combined with the sensitivity analysis on the performance of structural parameters, the main objects to improve the structure were put forward. Finally, on the basis of improved structure performance, the optimization technology was applied to improve the structure strength and stiffness properties. The thickness of elevator truss plate was optimized. The results indicate that the structure strength of elevator truss is increased by 21.1%, the stiffness is increased by 24.6%, the structure performance has been ameliorated obviously. And structure＇s weight is reduced by 7.2%.