摘要
为解决传统概率可靠性在解决流固耦合问题方面的不足,研究了结构不确定参量用超椭球凸集模型和区间变量共同描述下的非概率共振可靠性问题。针对隐式极限状态函数难以求解的问题,引入Kriging模型和超立方抽样技术应用于非概率可靠性分析。该方法用Kriging模型作为近似模型描述原结构,并在计算过程中不断更新近似模型。考虑管道与液体之间的耦合作用,利用有限元软件对所建立的简单管道系统进行模态计算并且结合防共振理论进行充液管路系统的流固耦合振动非概率可靠性分析,用优化的方法计算可靠性指标。工程算例分析表明该方法的合理性,能完善流固耦合管道系统的防共振可靠性分析方法与理论。
To improve the evaluation of reliability,a non-probabilistic reliability method was used to analysis the resonance of fluid-filled pipeline systems.The uncertain parameters of structures were described by both ellipsoidal modes and interval parameters.Kriging model and lating hypercube sampling technique were employed to settle the problem that implicit limit state functions were not easily be solved.The Kriging model,as an approximate model,was introduced to represent the original structure and was update gradually in the computation.Considering the fluid-structure interaction（FSI）,and by using the FEM software,a fluid-filled pipeline system was modeled and the system＇s modal was analyzed.Then, after the anti-resonance reliability theory was presented to process the nonprobabilistic reliability of the FSI pipeline system,optimization method was used to calculate the parameter reliability.An example was introduced to demonstrate the validity and efficiency of the method.And it is shown that the proposed method has the capability to improve the anti-resonance design and the reliability estimation of fluid-filled pipelines.
出处
《振动工程学报》
EI
CSCD
北大核心
2012年第2期117-123,共7页
Journal of Vibration Engineering
基金
高等学校学科创新引智计划资助项目(B07050)
国家自然科学基金资助项目(50905142)
西北工业大学基础研究基金资助项目(JC201114)
关键词
非概率可靠性
充液管道
流固耦合
共振可靠度
KRIGING模型
non-probabilistic reliability
fluid-filled pipeline
fluid-structure interaction（FSI）
resonance reliability
Kriging model
