复杂零件结构设计的概念单元方法

发布时间：2018-05-26 22:45

本文选题：机械零件 + 结构　；参考：《机械工程学报》2016年07期

【摘要】：提出复杂零件结构设计的概念单元方法,即几何与物理模型、概念构型与单元、强度与刚度、工艺与造型四部分。分析了复杂零件的应用场合和结构特点,建立几何实体与物理模型,包含联接与安装部位,设置工况载荷与约束,定义设计区域与非设计区域;采用结构拓扑优化方法获得在若干工况下零件实体内部的传力路线,综合多工况下传力路线和相关因素,构造出复杂零件结构的概念模型,并结合零件的载荷形式,综合考虑制造工艺性,选择合适的零件结构单元;依据零件的强度或刚度要求,使零件壁板和结构单元具有满足性能要求的尺度;同时,兼顾零件结构工艺性和视觉美学效果等因素,对零件结构形状和尺度进行工艺和造型再设计;以加工中心立柱和三级齿轮减速器箱体为例展示了结构设计过程,通过合理布置零件内部筋板、单元的结构形式和尺寸,为复杂零件的轻量化和科学合理结构设计提供有效方法。
[Abstract]:A conceptual element method for structural design of complex parts is presented, which consists of four parts: geometric and physical model, conceptual configuration and element, strength and stiffness, process and modeling. This paper analyzes the application situation and structural characteristics of complex parts, establishes the geometric entity and physical model, including the connection and installation position, sets up the working load and constraints, and defines the design area and non-design area. The method of structural topology optimization is used to obtain the internal force transfer route of parts under several working conditions. The conceptual model of complex parts structure is constructed by synthesizing the load transfer routes and related factors under multiple working conditions, and combined with the load form of the parts. According to the strength or stiffness of the part, the wall plate and the structure unit of the part have the scale to meet the requirement of the performance, at the same time, The structural shape and scale of the parts are redesigned by taking into account the structural technicality and visual aesthetic effect of the parts, and the structural design process is demonstrated by taking the machining center column and the three-stage gear reducer box as an example. The structural form and size of the elements are arranged reasonably to provide an effective method for the lightweight and scientific structural design of the complex parts.
【作者单位】：大连理工大学机械工程学院;
【基金】：国家自然科学基金资助项目(51275067)
【分类号】：TH122

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