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�������պ����ѧѧ�� 2006, Vol. 32 Issue (10) :1174-1179    DOI:
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���, ʷ�ǽ�, �����, ������*
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Experiment of damping characteristic of non-rotating shrouded blade
Hong Jie, Shi Yajie, Liu Shuguo, Zhu Zigen*
School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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Abstract�� A measurement system was designed to accurately measure dynamic responses of non-rotating shrouded blade, in which initial normal load can be put on the friction interface by a load disc accurately. The design principle of this system, the loading scheme and the test errors were described. The dynamic response of the first bending mode of the shrouded blade with different shroud contact angles and shroud places were measured under various initial normal loads on the interface and different exciting force. The effects of the initial normal load, shroud contact angle and shroud place on the friction damping were analyzed from the test data. The results indicate that there is an optimal preload under which the shroud contact can provides maximal performance in dissipating vibratory energy for a given exciting force; and the relative displacement between the interfaces larger, the dissipating vibratory energy more. The design of shroud contact angle and place should obey this rule.
Keywords�� dry friction   vibration   damping   blade   shroud   experiment     
Received 2006-06-01;
About author: �� ��(1965-),��,������,����, hongjie@buaa.edu.cn.
���, ʷ�ǽ�, �����, ������.��͹��ҶƬ����ת״̬������������[J]  �������պ����ѧѧ��, 2006,V32(10): 1174-1179
Hong Jie, Shi Yajie, Liu Shuguo, Zhu Zigen.Experiment of damping characteristic of non-rotating shrouded blade[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2006,V32(10): 1174-1179
http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2006/V32/I10/1174
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