Stochastic Reliability Metholdology for Complex Structures with Uncertainties

具有不确定性的复杂结构的随机可靠性方法

• 批准号: 8818648
• 负责人: Adriene Jefferson
• 金额: $ 12.6万
• 依托单位: Purdue Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-11-01 至 1992-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8818648&HistoricalAwards=false
• 关键词: Stochastic; Reliability; Metholdology; Complex; Structures

This project is to formulate a stochastic finite element procedure to study the static and dynamic behaviors of complex structures, with emphasis on thin shell structural uncertainties under random earthquake load. Structural uncertainties such as initial geometric imperfections, material properties, boundary conditions, and structural damping coefficients, etc. and random loads are considered. The main objectives are: (1) to extend the formulation of an existing curved quadrilateral thin shell element with deterministic imperfections and geometrical and material nonlinearities to include random imperfections and other structural uncertainties; (2) to codify the formulation to study the combined effects of several structural uncertainties on static analysis; (3) to develop a solution procedure within the framework of stochastic finite element approach and equivalent linearization technique, which simultaneously accounts for the effects of several structural uncertainties in spatial domain and temporal random loadings; (4) to study the dynamic response and dynamic buckling behaviors of thin complex structures subjected to earthquake load. The effort will lead to the development of a design methodology reliability analysis of practical complex structures with structural uncertainties subjected to random earthquake load.

本计画将建立一个随机有限元程序， 研究复杂结构的静态和动态行为， 随机载荷作用下薄壳结构不确定性 地震荷载 结构不确定性，如初始几何缺陷， 材料特性、边界条件和结构阻尼 系数等和随机载荷。 主要目标是：（1）扩大一个 现有的确定性曲四边形薄壳单元 缺陷以及几何和材料非线性，包括 随机缺陷和其他结构不确定性;（2） 编纂公式，以研究几种 结构静力分析的不确定性;（3）制定解决方案 随机有限元法 方法和等效线性化技术，同时 解释了空间中几种结构不确定性的影响， 域和时间随机载荷;（4）研究动态 薄壁复杂结构的动力响应和动力屈曲特性 承受地震荷载。 这项工作将导致设计方法的发展 具有结构可靠性的实际复杂结构的可靠性分析 随机地震荷载下的不确定性。