摘要
多输出点柔性机构在微夹持和微定位领域应用广泛,但其多个输出点的协调变形要求往往被忽视。因此提出一种多输出点协调变形柔性机构拓扑优化设计的新方法。首先,将协调变形条件作为优化约束条件,建立基于固体各向同性材料插值模型的多输出点柔性机构协调变形优化模型,可以较为精确的控制目标输出点的位移,从而使机构按照规划路径运动满足特殊需求。其次,针对协调变形约束削弱机构变形能力的问题,将机构的支撑条件作为设计变量融合到结构优化中,建立多输出点协调变形柔性机构结构与支撑的综合拓扑优化模型及数学求解模型,通过改进的移动渐近算法,求得多输出点柔性机构结构与支撑的综合最优布局。最后,通过数值算例验证了方法的正确性。
In the field of micro-gripper and micro-positioning,multi-output-point compliant mechanisms have been widely applied.But the multi-output-point compatible deformation demand is often ignored.We present a new optimization method of multi-output-point compatible deformation compliant mechanisms.First,we consider compatible deformation as an optimization constraint and establish the optimization model based on the solid isotropic microstructures with penalization（SIMP）.This method can control the target point displacement more precisely,so that the mechanism can follow the predetermined moving path and meet the specific needs.Taking into account the compatible problems weakens the compliant mechanisms deformation capability,so the support conditions are introduced as a new set of design variables.We establish the structure and supports topology optimization model and mathematics solution model of multi-output-point compatible deformation compliant mechanisms.Through the method of moving asymptotes algorithm（MMA）,the best structure and support conditions are obtained.These methods are demonstrated to be valid through the numerical examples.
出处
《机械科学与技术》
CSCD
北大核心
2011年第5期751-755,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(50675175)
高等学校博士学科点专项科研基金项目(20096102110017)资助
关键词
柔性机构
拓扑优化
支撑优化
多输出点
协调变形
compliant mechanisms
topology optimization
support optimization
multi-output-point
compatible
