Uncertainty-Based Optimal Structural Design

基于不确定性的优化结构设计

• 批准号: 9522654
• 负责人: Chris Pantelides
• 金额: $ 11.24万
• 依托单位: University of Utah
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-09-15 至 1999-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9522654&HistoricalAwards=false
• 关键词: Uncertainty; Based; Optimal; Structural; Design

9522654 Pantelides The concept of convex modeling provides an attractive alternative for analysis of uncertainty in systems for which a limited amount of information is available. The optimization algorithms to be developed will be used for minimizing the volume of a structural system under uncertain static loads, self-strained uncertainties such as fabrication errors, temperature gradients, support settlements, and a combination of the above uncertainties. Constraints on the joint displacements and member stresses will be imposed. Another type of problem with uncertainty is that of minimizing the volume of a structural rotational or transnational supporting springs. Constraints on member stresses and joint displacements are imposed. A different type of problem is one of minimizing the amplitude of the primary structure equipped with a dynamic absorber when uncertainties exist in the damping and frequency characteristics of the vibration absorber and the primary structure. The optimum design of structures with uncertain structural properties, under uncertain earthquake excitations will also be performed. Finally the minimum volume design of structures with uncertain soil- structure interaction properties, under uncertain earthquakes will be performed.

小行星9522654 凸模型的概念提供了一个有吸引力的替代系统中的不确定性分析的信息是有限的。 将开发的优化算法将用于在不确定的静载荷、自应变不确定性（如制造误差、温度梯度、支撑沉降以及上述不确定性的组合）下最小化结构系统的体积。 将对接头位移和构件应力施加约束。 另一种不确定性问题是使结构旋转或跨国支撑弹簧的体积最小化。 对构件应力和接头位移施加约束。 另一种类型的问题是，当减振器和主结构的阻尼和频率特性存在不确定性时，使配备有动力减振器的主结构的振幅最小化。 在不确定的地震激励下，具有不确定结构特性的结构的优化设计也将被执行。 最后，对不确定地震作用下土-结构相互作用特性不确定的结构进行最小体积设计。