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�������պ����ѧѧ�� 2011, Vol. 37 Issue (12) :1484-1489,1509    DOI:
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������1, ����1, ������2, ��־ƽ1*
1. �������պ����ѧ ���տ�ѧ�빤��ѧԺ, ���� 100191;
2. �������϶����������޹�˾, ���� 100036
Dynamic buckling failure analysis of rod with uncertain initial geometrical imperfection
Wang Xiaojun1, Wang Lei1, Ma Lihong2, Qiu Zhiping1*
1. School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;
2. Guodian United Power Technology Co.Ltd, Beijing 100036

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ժҪ �ɳ�ʼ����ȱ��������Ľṹ�����غɽ�����߿ɴ�70%.������������ԭ��ʹ�ýṹ��ʼ����ȱ���������в�ȷ����,�����ֲ�ȷ�����ֱ�Ȼ�ᵼ�½ṹ���������붯̬������Ӧ�IJ�ȷ����.�о��˶��������º��в�ȷ����ʼ����ȱ�ݸ˵Ķ�̬����ʧЧ����.���ڻ����Ӷȶ����˶�̬������ȫ����.�����������������͹ģ�ͷ���,�����˾��в�ȷ����ʼ����ȱ�ݸ˵Ļ��ڻ���λ�ƵĶ�̬������ȫ���ӵ��������,����Ϊ�жϾ��в�ȷ����ʼ����ȱ�ݸ˽ṹ�Ķ�̬����ʧЧ�����ṩ����Ҫ����.
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Abstract�� It can be found from some data that the buckling load of structure may decrease by 70 percent due to the existence of initial geometric imperfection.The initial geometric imperfection may be uncertain due to the manufacture errors and so on, so this will lead to the uncertainty of the buckling load or the dynamic buckling response of structure. The problem of dynamic buckling failure of rod with uncertain initial geometrical imperfection under the axial dynamic loading was studied. The safety factor was defined based on the integral deflection. The uncertain initial geometrical imperfection was described by interval analysis and convex models respectively, and then the least favorable estimation on the dynamic buckling safety factor of rod was evaluated based on the integral displacements. The results are significant for judging the dynamic buckling failure analysis of rod with uncertain initial geometrical imperfection.
Keywords�� dynamic buckling of rod   initial geometrical imperfection   uncertainty   interval analysis method   convex model method     
Received 2010-06-25;

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About author: ������(1978-),��,�����ɽ��,������,XJWang@buaa.edu.cn.
������, ����, ������, ��־ƽ.��ȷ����ʼ����ȱ�ݸ˶�̬����ʧЧ����[J]  �������պ����ѧѧ��, 2011,V37(12): 1484-1489,1509
Wang Xiaojun, Wang Lei, Ma Lihong, Qiu Zhiping.Dynamic buckling failure analysis of rod with uncertain initial geometrical imperfection[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2011,V37(12): 1484-1489,1509
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