基于“互联网+”电梯轿厢模块化结构变异设计

Variant design for modular structures of elevator cars based on"internet+"

【目的】为了满足用户对低能耗、轻量化电梯轿厢模块化结构的快速定制化需求,搭建了一种“互联网+”轿厢模块化结构变异设计框架。【方法】首先,在B/S架构下,采用Vue技术开发用户自定义设计数据采集前端,获取用户定制化设计需求,并通过Springboot技术开发模块化结构变异设计后端,搭建前后端分离的Web框架,实现前后端数据的双向绑定。其次,在后端引入一种考虑应力约束的高比刚度拓扑优化设计方法,以轿厢结构强度和体积分数为用户自定义约束条件,以轿厢模块化结构刚度最大化为优化目标,采用移动渐进线优化算法为求解器,驱动轻量化电梯轿厢模块化结构的快速定制化变异设计。然后,在优化方法中引入Heaviside函数,以保证设计结果具有清晰的几何边界。最后,以某型背包电梯轿厢架为例,在用户自定义界面设定轿厢结构的几何与力学边界参数,开展创新型轻量化轿厢架结构的变异设计,并对其进行有限元仿真分析。【结果】在给定设计需求的前提下,结构变异过程稳定、收敛性强,所设计的结构几何边界清晰;在相同的力学边界条件并满足材料的2倍最小安全系数条件下,所设计的轿厢架结构的质量比原有结构的下降了16.09%,其结构变形满足实际应用需求,其比刚度得到了显著提升,验证了所搭建结构变异设计框架的有效性。【结论】所搭建的设计框架能在保证结构强度的前提下提高结构的比刚度,可有效应用于轻量化电梯轿厢模块化结构的快速定制化设计,缩短了轿厢模块化结构的设计周期,丰富了轿厢模块化结构的设计手段。

[Purposes]In order to meet the customized requirements of low energy-consumption and light-weight elevator car,a variation design framework of modular car structure based on"Internet+"is constructed.[Methods]First of all,under the B/S architecture,Vue technology was used to develop user-defined design data acquisition front-end to obtain customized design requirements,and Springboot technology was used to develop modular structure variation design back-end.A Web framework for front-end separation was built,which can realize bidirectional binding of front-end and back-end data.Secondly,a topology optimization design method for high-specific stiffness considering stress constraints was embedded in the back end.The strength and volume fraction of the car structure was considered as user-defined constraints,and the maximum stiffness of the car modular structure was optimized as the optimization goal.The moving asymptotic optimization algorithm was used as the solver to drive the rapid customized variation design of the lightweight car modular structure.Then,the heavyside function was introduced into the optimization method to ensure that the design results have clear geometric boundaries.Finally,taking a certain type of backpack elevator car frame as an example,the geometric and mechanical boundary parameters of the car structure were set in the user-defined interface to carry out the variation design of the innovative lightweight car frame structure,and the finite element simulation analysis was carried out.[Findings]Under the premise of given design requirements,the structural variation process was stable and convergent,and the geometric boundary of the designed structure was clear.Under the same mechanical boundary conditions and meeting the 2 times minimum safety factor of the material,the mass of the designed car frame structure reduced 16.09%comparing with the original structure.The structural deformation was ensured to meet the practical application requirements,and the specific stiffness was significantly improved,which verified the effectiveness of the structural variation design framework established in this paper.[Conclusions]The proposed design framework can improve the specific stiffness of the structure under the premise of ensuring the strength of the structure,which can be effectively applied to the rapid customized design of the lightweight elevator car modular structure.It can shorten the design cycle of the car modular structure,and enrich the design means of the car modular structure.