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�������պ����ѧѧ�� 2011, Vol. 37 Issue (4) :439-445    DOI:
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Design method for specification of force-limited vibration testing
Mo Changyu, Yuan Hongjie*
School of Reliability and Systems Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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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.
Keywords�� complex TDFS   force-limited   modal effective mass     
Received 2010-01-25;
About author: Ī���(1985-),��,�����IJ���,˶ʿ��,moyu_0513@163.com.
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Ī���, Ԭ���.����������������Ʒ���[J]  �������պ����ѧѧ��, 2011,V37(4): 439-445
Mo Changyu, Yuan Hongjie.Design method for specification of force-limited vibration testing[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2011,V37(4): 439-445
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