含非线性大变形构件的柔顺机构建模与分析

李鹏飞,曹博宇,汪振宇,赵晨,王立鹏

振动与冲击 ›› 2019, Vol. 38 ›› Issue (11) : 110-115.

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (11) : 110-115.
论文

含非线性大变形构件的柔顺机构建模与分析

  • 李鹏飞,曹博宇,汪振宇,赵晨,王立鹏
作者信息 +

Modeling and analysis for compliant mechanisms with nonlinear large deformation components

  • LI Pengfei, CAO Boyu, WANG Zhenyu, ZHAO Chen, WANG Lipeng
Author information +
文章历史 +

摘要

柔顺机构的大范围运动引起柔性构件产生几何非线性大变形,使得机构的建模与分析变得困难。本文分别采用椭圆积分法和绝对节点坐标法(ANCF)建立柔顺机构的力学模型,获得了机构运动过程中柔性构件的变形和驱动力的变化规律。以一种固定—导向柔顺梁为例,仿真与实验结果验证了以上方法的有效性;以一种柔顺双稳态机构为例,仿真结果验证了ANCF法对复杂柔顺机构动力学特性分析的有效性;通过以上两种方法的建模与分析过程对比,ANCF法对柔顺机构建模与分析更具有适应性。

Abstract

Geometrical nonlinear large deformations of flexible components caused by large scale motion of compliant mechanisms make it be difficult to model and analyze a compliant mechanism. Here, basic principles of the elliptic integral method (EIM) and the absolute nodal coordinate formulation (ANCF) were introduced, and two mechanical models of a compliant mechanism were established using EIM and ANCF, respectively to get variation laws of deformation and driving force of flexible components in motion process of the compliant mechanism. A fix-guided compliant mechanism was taken as an example, its simulation and test results verified the effectiveness of the above two methods. A dual-stable state compliant mechanism was taken as an example, and its simulation results verified the effectiveness of ANCF for dynamic characteristics analysis of complex compliant mechanisms. Through comparing modeling and analysis processes of the above two methods, it was shown that ANCF is more suitable for modeling and analysis of compliant mechanisms.

关键词

柔顺机构 / 非线性大变形 / 绝对节点坐标法 / 椭圆积分法

Key words

Compliant mechanism / Nonlinear larger deformation / ANCF / EIM

引用本文

导出引用
李鹏飞,曹博宇,汪振宇,赵晨,王立鹏. 含非线性大变形构件的柔顺机构建模与分析[J]. 振动与冲击, 2019, 38(11): 110-115
LI Pengfei, CAO Boyu, WANG Zhenyu, ZHAO Chen, WANG Lipeng. Modeling and analysis for compliant mechanisms with nonlinear large deformation components[J]. Journal of Vibration and Shock, 2019, 38(11): 110-115

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