北京航空航天大学学报 ›› 2011, Vol. 37 ›› Issue (4): 439-445.

• 论文 • 上一篇    下一篇

力限振动试验条件设计方法

莫昌瑜, 袁宏杰   

  1. 北京航空航天大学 可靠性与系统工程学院, 北京 100191
  • 收稿日期:2010-01-25 出版日期:2011-04-29 发布日期:2011-04-29
  • 作者简介:莫昌瑜(1985-),男,海南文昌人,硕士生,moyu_0513@163.com.

Design method for specification of force-limited vibration testing

Mo Changyu, Yuan Hongjie   

  1. School of Reliability and Systems Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2010-01-25 Online:2011-04-29 Published:2011-04-29

摘要: 给出了一种基于复杂二自由度模型的力限振动试验条件设计方法.该方法应用动态子结构法计算试验件结构和支持结构的模态有效质量和剩余质量,根据模态有效质量在频域上的分布情况确定不同频带内振动系统的复杂二自由度模型参数,结合支持结构激励条件给出试验件与支持结构接触面的力谱和加速度谱,在此基础上进行包络,得到力限振动试验剖面.仿真结果表明,由该方法给出的力限振动试验条件,与传统加速度试验条件相比,能更加真实地反应试验件的振动环境.

Abstract: The method based on the complex two degrees of freedom system(TDFS) mode to design the specification of force-limited vibration testing was proposed. In the method, dynamic sub-structure was adopted to calculate modal effective mass and modal residual mass of specimen structure and supporting structure.The complex TDFS model parameter of vibration system in different frequency bands was defined according to the distribution of mode effective mass in frequency domain.The force spectrum and acceleration spectrum of contact surface between specimen and supporting structure was defined with the excitation condition of supporting structure. Spectrum envelope is the force-limited vibration test profile. Simulation results demonstrate that the force-limited vibration test conditions defined by this method is much more reality on vibration environment than conventional acceleration test condition.

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