摘要
为了提高柔顺机构的操作精度和工作性能,需要对其频率特性进行研究.基于有限元方法,建立柔顺机构的动力学方程,得到系统各阶固有频率和模态.并在此基础上,给出了机构固有频率灵敏度的计算方法.算例结果表明,柔顺机构频率特性与各设计参数间存在着特有的内在关系,最后说明了该方法对柔顺机构频率特性分析的可行性和有效性.
To improve the performance and operation accuracy of compliant mechanisms, a lot of work needs to be done to further the study of frequency characteristics analysis of compliant mechanisms. The dynamic equation of compliant mechanism based on the finite element method is developed, and the natural frequencies and modes are derived at first. A method for calculating the sensitivity of natural frequency is then presented. The numerical example result shows that the design parameters have impact on the frequency characteristics of compliant mechanisms, and also indicates that the method for frequency characteristics analysis of compliant mechanisms is effective and efficient.
出处
《北京工业大学学报》
EI
CAS
CSCD
北大核心
2008年第1期20-25,共6页
Journal of Beijing University of Technology
基金
北京市教委科技发展计划项目(KM200610005003)
国家自然科学基金(50575002)
北京市自然科学基金(3062004)
北京市属市管高等学校人才强教计划资助项目(PHR(IHLB))
关键词
柔顺机构
有限元
固有频率
灵敏度
compliant mechanisms
finite element method
natural frequencies
sensitivity
