北京航空航天大学学报 ›› 2009, Vol. 35 ›› Issue (6): 697-700.

• 论文 • 上一篇    下一篇

基于有限元法的主动隔振单元建模分析

高艳蕾, 李 琳   

  1. 北京航空航天大学 能源与动力工程学院, 北京 100191
  • 收稿日期:2008-05-05 出版日期:2009-06-30 发布日期:2010-09-16
  • 作者简介:高艳蕾(1976-),女,辽宁沈阳人,博士生,GYL2005_606@163.com.
  • 基金资助:

    国家自然科学基金重点资助项目(60534020)

Modeling of active vibration isolation module with finite element method

Gao Yanlei, Li Lin   

  1. School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2008-05-05 Online:2009-06-30 Published:2010-09-16

摘要: 针对大载荷对象低频微振动主动振动控制平台的设计问题,提出一种基于模块拼装思想的主被动混合隔振平台结构方案,模块化设计大大简化了主动振动控制平台的设计难度,使得拼装后的平台具有承载能力强、精度高等优点,由于所用模块单元结构形式完全相同,组合后的主动隔振平台的特性完全取决于单元的特性;以主动隔振单元为研究对象运用有限元法建立其动力学模型,模型中包含以位移向量形式表示的外界激振项和以力向量形式表示的主动控制项,当上述两项为零时,可以通过求解动力学模型得到主动隔振单元的固有特性;利用ANSYS商用软件进行主动隔振单元的模态分析,对比结果验证了该动力学模型的正确性.

Abstract: Aiming at the design of the active micro-vibration control platform with large payloads at low frequency, one kind of the active vibration control platform using modularity design was proposed, which showed the characteristics of the strong carrying capacity and high isolation precision. Modularity simplifies the active vibration isolation platform design greatly. Using four modules the active vibration isolation platform can isolate the vibration of six degrees of freedom, by which a device of two tons can be isolated from vibrations. Because the module has the same construction form, the active vibration isolation platform-s characteristic is decided completely by the module-s characteristic. The finite element method was used to building the dynamic model of the active vibration isolation module, which contained the displacement vector for outside excitation and the force vector for actuator-s control force, when the above two vectors were zero, inherent characteristics of the active vibration isolation module were obtained by solving the dynamics model. Then validity of the dynamic model was illustrated by comparison with the results of the modal analysis by ANSYS software.

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