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On the Dynamical Tendency of Intuitively Designed Shapes

论直观设计形状的动态倾向

基本信息

批准号：
09838010
负责人：
KUBO Mitsunori
金额：
$ 1.79万
依托单位：
Chiba University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09838010/
关键词：
Intuitive Shape Grip Cantilever beam Finite Element Method Principal Stress Structural Dynamics Design

项目摘要

In various simple objects, we can find shapes that effectively avoid stress concentration. These shapes can be observed in the structural elements of objects, and these elements show some simple form. Such elements can be found in the design of many historical products such as agricultural tools, machine tools, and classic cars as well as modern machines, Most of the elements have been designed intuitively with some knowledge obtained from experience in the given situation. One of the dynamical characteristics observed in the stress distribution of the shapes is stress coherence.As a case study, some shapes for beer mug handles were designed intuitively, and the characteristics of the shapes were examined using finite element analysis. As a result, it was demonstrated that there is a clear relationship between the aesthetic desirability of shapes and stress coherence. It was further suggested that a computer aided design system intended to reproduce the structural characteristics which induce such coherence will be able to design complex forms numerically. If a design system is able to produce shapes displaying coherence, coordination of sense of design and the design process can be expected as well as avoidance of stress concentration.Finally, we tried to propose a shape design method which would imitate the process of growth found in nature, which is generally a mechanism that avoids stress concentration. This method could then become one of the basic system for designing shapes containing stress coherence.

在各种简单的物体中，我们可以找到有效避免应力集中的形状。这些形状可以在物体的结构元素中观察到，这些元素表现出某种简单的形式。这些元素可以在许多历史产品的设计中找到，如农业工具、机床、经典汽车以及现代机器。大多数元素都是根据给定情况下的经验获得的一些知识直观地设计的。形状应力分布的动态特性之一是应力一致性，以啤酒杯手柄为例，直观地设计了形状，并利用有限元分析方法对形状的特性进行了检验。结果表明，形状的审美需要和应力连贯性之间存在明显的关系。还有人建议，旨在再现导致这种连贯性的结构特征的计算机辅助设计系统将能够用数字设计复杂的形式。如果设计系统能够产生具有连贯性的形状，那么设计感和设计过程的协调就可以预期，并且可以避免应力集中。最后，我们尝试提出一种形状设计方法，它将模仿自然界中发现的生长过程，这通常是一种避免应力集中的机制。该方法可以成为设计具有应力相干性的形状的基本系统之一。