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初偏心影响下的水下高速运动体的抗弯稳定性及可靠性分析
引用本文:安伟光,顾永维,安海.初偏心影响下的水下高速运动体的抗弯稳定性及可靠性分析[J].兵工学报,2008,29(7):824-828.
作者姓名:安伟光  顾永维  安海
作者单位:哈尔滨工程大学,航天工程系,黑龙江,哈尔滨,150001;哈尔滨工程大学,航天工程系,黑龙江,哈尔滨,150001;海洋石油工程股份有限公司,天津,300045
摘    要:针对有初偏心的水下高速运动弹性体的抗弯稳定性问题,建立了一个简化的力学模型。基于小挠度下杆所承受载荷的微分方程,确定了水下高速运动弹性体的弯曲失稳的临界载荷,得到了临界载荷与初始偏心之间的关系。在此基础上进行了结构的可靠性分析,得到了结构的可靠性指标和失效概率。最后,通过算例,说明该方法的有效性。

关 键 词:固体力学  高速运动体  初偏心  抗弯稳定性  弹性体  结构可靠性

Analysis of Antibending Stability and Reliability of an Elastic Body with Initial Eccentricity at High Speed Motion Underwater
AN Wei-guang,GU Yong-wei,AN Hai.Analysis of Antibending Stability and Reliability of an Elastic Body with Initial Eccentricity at High Speed Motion Underwater[J].Acta Armamentarii,2008,29(7):824-828.
Authors:AN Wei-guang  GU Yong-wei  AN Hai
Affiliation:1. School of Civil Engineering, Harbin Engineering University, Harbin 150001,Heilongjiang, China; 2. Offshore Oil Engineering Co.LTD, Tianjin 300045, China
Abstract:Taking aim at the anti bending stability of an elastic body with initial essentricity at high speed motion underwater, a simplified mechanical model was established. Based on the differential e- quation of load-bearing of small deflection bar, the critical load of bending unstability of the elastic body was confirmed, and the relation between the critical load and the initial eccentricity was ob?tained .On the above basis, the structural reliability analysis was carried through, and the reliability index and the probability of iailure of the structure were obtained. The example was given to demon?strate the efficiency of tnis method.
Keywords:solid mechanics    body at high speed motion    initial eccentricity    buckling stability    elastic body    structural reliability  
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