圆柜内机缓冲衬垫多目标优化设计

Multi-objective Optimization Design of Cushion for Inner Unit of Circular Cabinet Air Conditioner

中文关键词: 有限元分析  多目标优化  Kriging模型  最优空间填充设计

英文关键词: finite element analysis  multi-objective optimization  Kriging model  optimal space filling design

中文摘要:

      目的 基于有限元软件研究圆柜内机包装件静态载荷下的力学特性，并进行多目标优化设计。方法 利用CREO建立三维模型、ANSYS Workbench建立有限元模型，对圆柜内机包装件进行静力学分析。以上缓冲衬垫的5条筋条厚度和2侧壁厚作为设计变量，以上缓冲衬垫的质量、包装件的最大变形量和最大等效应力作为目标函数建立优化模型。基于OSF试验设计方法和Kriging模型，采用多目标遗传算法进行多目标优化设计。结果 优化前的包装件最大变形量为1.511 3 mm，最大等效应力为0.327 6 MPa。优化后包装件的筋条和侧壁厚度显著降低，上缓冲衬垫质量减少了27%，整体强度无显著降低。结论 建立的多目标优化设计方法合理且Kriging模型精度较高，在保证缓冲防护效果的基础上，实现了轻量化设计，降低了包装成本。

英文摘要:

      Thework aims to study the mechanical characteristics of the inner package of circular cabinet air conditioner under static load based on the finite element software, and carry out multi-objective optimization design. A three-dimensional model was established by CREO and a finite element model was established by ANSYS Workbench to carry out static analysis on the inner package of circular cabinet air conditioner. The multi-objective optimization model was established with the thickness of 5 ribs and 2 side walls of the upper cushion as design variables and the mass of the upper cushion, maximum deformation and maximum equivalent stress of the package as the objective functions. Based on OSF experiment design method and Kriging model, multi-objective optimization design was carried out by multi-objective genetic algorithm. The maximum deformation of the package before optimization was 1.511 3 mm, and the maximum equivalent stress was 0.327 6 MPa. After optimization, the thickness of the ribs and side walls of the package decreased significantly, the mass of the upper cushion decreased by 27%, and the overall strength did not decrease significantly. The multi-objective optimization design method established is reasonable and the Kriging model has high accuracy. On the basis of ensuring the cushioning protection effect, the lightweight design is realized and the packaging cost is reduced.