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�������պ����ѧѧ�� 2004, Vol. 30 Issue (06) :520-523    DOI:
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Analysis of wave propagation in the built-up structures of rod-beam and beam-beam
Xing Yufeng, Wang Lijuan*
School of Aeronautic Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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Abstract�� The impact problems of a rod on a Timoshenko beam and a Timoshenko beam on another Timoshenko beam were analyzed by means of the indirect mode superposition method(IMSM). A rod on a beam and a beam on another beam are both typical built-up structures. The displacement compatible equations of the two problems were established by IMSM on the basis of the individually obtainedmode functions and frequencies of impactors and targets, and solved by numerical integration step by step. The numerical analysis by making use of dimensionless variables show the propagation of the longitudinal waves along rod, and the longitudinal and transverse waves along beam, and the mutual transition and reflection between the longitudinal waves and the transverse waves in the impact built-up structures in detail.
Keywords�� wave propagation   composite structures   beams   collisions   mode superposition method     
Received 2003-01-20;
About author: ������(1964-),��,���ֳ�����,����, xingyf@buaa.edu.cn.
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Xing Yufeng, Wang Lijuan.Analysis of wave propagation in the built-up structures of rod-beam and beam-beam[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2004,V30(06): 520-523
http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2004/V30/I06/520
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