基于约束的参数化设计研究现状及其发展

分析基于约束参数化设计的研究现状 ,介绍在线参数化和离线参数化两种设计方法 ,比较各种参数化方法的优缺点 ,指出目前参数化设计中存在的一些问题 。

基于比例与尺度约束的NC机床形态设计研究

在 NC机床的形态设计中 ,必须按照工业设计中美学原则来规范设计方案。在充分研究美学原则“比例与尺度”的特点和要求的基础上 ,提出了约束造型的方法 。

座椅静态舒适性控制方法研究

大部分时间座椅是随着整车运动的过程进行振动运动,给驾乘者提供乘驾体验。其静态的舒适性对驾乘者的肌肉疲劳程度和身体健康有很大影响:直线行驶过程中的姿态保持性,转弯过程中的侧向支撑性等。本文通过对汽车座椅静态舒适性控制方法的分析,得出座椅静态舒适性主要影响因素,可在座椅造型前期、工程设计阶段保证座椅舒适性需求,在整个座椅开发早期得到有效控制。本文包括作者对于汽车座椅静态舒适性的定义、相关造型约束、工程参数、舒适性评价方法等。

Interactive sculpting of product shape based on constraint manipulation in virtual environment

In product concept design, not only designers with professional CAD skills, but also final customers take part in the design and evaluation of product shape styling. Because customers usually lack surface modelling background and are not familiar with concrete operations of commercial CAD systems, it is difficult for them to express their change intentions of product shape through professional CAD tools if they are not satisfied with the current shape design. This paper puts forward a method for creating, dragging and manipulating constraint and load represented in form of icon entity in interactive sculpting of product shape in virtual environment. The method supports customers manipulation of sculpting constraints or loads on sculpting shapes in virtual reality interaction to control the deformation of product shape. Constraints management based on icon entity is similar to spline lofting operation that is familiar to engineers, so users do not need to know surface details or have any professional knowledge of surface modelling, by only using their physical and engineering experience, they can manipulate the sculpting of product shape intuitively.

行李箱盖尾灯支架的设计和工艺方案

汽车白车身行李箱盖尾灯支架与行李箱盖外板之间常采用电阻点焊的连接工艺方案,焊接可达性的要求极大地约束了外观造型(尤其是细长尾灯造型)设计。为寻求更好的解决方案,从设计和工艺2个方面进行创新性尝试,摸索出6种比较成熟可行的结构优化方案和5种连接工艺方式。实践证明,在设计过程中选用这些方案可较好地降低尾灯支架与行李箱盖外板之间的连接工艺对造型的约束。