Development of Optimization Method for Redundant Structure Based on Reliability Assessment Considering Damage of Collapse Mode

考虑倒塌模式损伤的基于可靠性评估的冗余结构优化方法研究

• 批准号: 03650364
• 负责人: MURAKAWA Hidekazu
• 金额: $ 0.58万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03650364/
• 关键词: Reliability Assessment; Optimum Design; Damage of Collapse Mode; Significance of Optimization; Large Scale Structure; MonteCarlo Simulation; Learning Algorithm; Hierarchical Optimization; 非正規乱数; 致命度; 冗長構造物; 安全率; 信頼性指標; 信頼性の配分; 初期破損; 最終強度

The fundamental philosophy of structural design can be divided into two according to the criterion which defines the failure of a structure. One is the allowable stress design based on the initial failure of individual member. The other is the design based on the ultimate strength of a structure. The design or the assessment of the safety of the structure can be further divided into deterministic and probabilistic approaches. However, regardless of these differences, the general goal of the design is an optimization of the structure with maintaining sufficient reliability.In this research, optimum designs of truss structures based on the deterministic and the probabilistic estimation of the strength for both the initial failure and the ultimate failure criteria are studied. Especially, a new probabilistic optimization method based on the ultimate strength is proposed. It employs the idea of optimum distribution of safety indices for each failure mode. Further, the significance of the optimum design based on the reliability is discussed through the comparison with deterministic approaches. Also, to deal with large scale structures, a hierarchical optimization method using MonteCarlo simulation with learning algorithm is proposed.

根据定义结构失效的标准，结构设计的基本原理可以分为两种。一种是基于单个构件初始破坏的许用应力设计。另一种是基于结构极限强度的设计。结构安全性的设计或评估可进一步分为确定性方法和概率方法。然而，尽管有这些差异，设计的总体目标是在保持足够的可靠性的情况下对结构进行优化。在本研究中，研究了基于初始失效和最终失效准则的强度的确定性和概率估计的桁架结构的优化设计。提出了一种新的基于极限强度的概率优化方法。它采用了对每种失效模式的安全系数进行优化分配的思想。通过与确定性方法的比较，讨论了基于可靠性的优化设计的意义。针对大型结构，提出了一种基于蒙特卡罗模拟和学习算法的递阶优化方法。

项目成果

Hidekazu MURAKAWA, Yukio UEDA and Kazuya NAGI: "hierarchical optimization method Using MonteCarlo Simulation with learning algorithm" Journal of Kansai Society of Naval Architects.

Hidekazu MURAKAWA、Yukio UEDA 和 Kazuya NAGI：“利用蒙特卡罗模拟和学习算法的分层优化方法”关西造船学会杂志。

村川 英一: "信頼性評価に基づく最適設計の意義に関する一考案" 関西造船協会誌. 218. 263-274 (1992)

Eiichi Murakawa：“关于基于可靠性评估的优化设计的重要性的想法”关西造船协会杂志 218. 263-274 (1992)。

Hidekazu MURAKAWA, Yukio UEDA, Shouji YAMAGATA and Kazuya NAGI: "Significance of Optimum Design Based on Reliability" Journal of Kansai Society of Naval Architects. No.218. 263-274 (1992)

Hidekazu MURAKAWA、Yukio UEDA、Shouji YAMAGATA 和 Kazuya NAGI：“基于可靠性的优化设计的意义”关西造船学会杂志。

村川 英一: "信頼性評価に基づく最適設計の意義に関する一考察" 関西造船協会誌. 218. 263-274 (1992)

Eiichi Murakawa：“基于可靠性评估的优化设计意义的研究”关西造船协会杂志218。263-274（1992）。

村川 英一,上田 幸雄,山形 祥司,奈木 一也: "信頼性評価に基づく最適設計の意義に関する一考察" 関西造船協会誌. (1992)

Eiichi Murakawa、Yukio Ueda、Shoji Yamagata、Kazuya Naki：“基于可靠性评估的优化设计意义的研究”关西造船协会杂志（1992）。