某型舰船危险部位结构可靠性分析

发布时间：2018-03-29 13:07

本文选题：开口结构　切入点：随机有限元　出处：《舰船科学技术》2016年13期

【摘要】：在响应面随机有限元法和结构可靠性理论的基础上,利用有限元软件Ansys建立某型舰船开口结构的梁板模型,采用改进的一次二阶矩法与分枝限界法、概率网络评估技术分析了开口结构在组合载荷作用下的可靠性。以结构的最危险点应力为输出变量,通过敏度分析忽略最大应力不敏感的变量拟和响应面方程。利用随机有限元和CAE软件结合开展结构系统的可靠性研究,避免了大型结构寻找失效模式的困难,使可靠性分析的效率得到极大提高。
[Abstract]:Based on the response surface of stochastic finite element method and the reliability theory, establish the model of beam slab opening structure of a ship by using finite element software Ansys, using a modified two order moment method and branch and bound method, probabilistic network evaluation technique of opening structure under the action of load bearing reliability in the portfolio. The danger point stress as the output variable, through sensitivity analysis ignores the maximum stress sensitive variables and pseudo response surface equation. Combining with the research of reliability on the structure of the system by using stochastic finite element method and CAE software, to avoid the large structure for the failure mode is difficult, which makes the reliability analysis efficiency is improved greatly.

【作者单位】：海军装备研究院;
【分类号】：U661.4

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