A Study on Reliability Assessment of Plate Structures Based on Collapse Mode Analysis

基于倒塌模态分析的板结构可靠性评估研究

• 批准号: 06452354
• 负责人: OKADA Hiroo
• 金额: $ 4.1万
• 依托单位: Osaka Prefecture University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06452354/
• 关键词: Combined plate & frame structures ;; Bucking and compressive strength ;; Crack damage analysis of joints ;; Structural reliability ;; Ultimate collapse modes ;; Torsional moment ;; High speed container ship ;; Applicability to practical structures

This study is concerned with the reliability assessment of combined plate and beam structures based on collapse mode analysis. Results obtained in this study are summarized as follows :1. A new plate element is developed for efficiently and accurately analyzing thin walled structures such as marine structures composed of many stiffened plate panels with initial imperfection, using selective eigen-functions for large deflection and sectional yield conditions.2. A new system using combined plate and beam elements is presented to offer the expansion of the applicability of the structural reliability-based sensitivity analysis combined with collapse mode analysis.3. The applicabiity of the proposed system is demonstrated through a numerical example applied to a simple box girder with longitudinal stiffeners.4. Features of the structual reliability and sensitivity factors of a high speed container ship under heading and oblique sea conditions are also investigated by applying the newly developed system.5. The analytical result, e.g., for the aft L/4 part of the hull structure under the oblique sea condition shows that effects of in-plane shearing stresses due to torsional moment on the dominant collapse mode including damages of the middle part of the inside shell elements are dominant. These features are good correspondent with results in previous researches.

本文研究了基于倒塌模态分析的板梁组合结构的可靠性评估问题。本研究取得的主要结果如下：1.提出了一种新的板单元，该单元采用大挠度和截面屈服条件下的选择性特征函数，能够高效、准确地分析由多个具有初始缺陷的加筋板组成的薄壁结构，如海洋结构.提出了一种新的板梁组合单元体系，扩展了基于可靠度的灵敏度分析与倒塌模态分析相结合的适用范围.通过一个简单箱梁纵向加劲梁的算例，验证了该体系的适用性.应用该系统，研究了高速集装箱船在航向和斜浪条件下的结构可靠性和灵敏度特性.分析结果，例如，对斜浪条件下船体结构后L/4部分的破坏模式的分析表明，由扭转力矩引起的面内剪应力对包括内壳单元中部损伤在内的主要破坏模式的影响占主导地位。这些特征与前人的研究结果相吻合。

项目成果

Okada, H., et al.: "Case Studies on Structural Reliability of Marine Structures Based on Collapse Mode Analysis" Proc., Int.Conf.for New Ship Technology into 21st Century (Shanhai, China). 299-306 (1994)

Okada, H., et al.：“基于塌陷模式分析的海洋结构结构可靠性案例研究”Proc.，Int.Conf.for New Ship Technology into 21st Century（中国上海）。

Okada, H: "Reliability Analysis System of Welded Steel Structures Based on Collapse Mode Generation and Its Application" Proc., Spring Meeting of the Welding Society of Japan. (to be presented)(in Japanese). (1996)

Okada, H：“基于塌陷模式生成的焊接钢结构可靠性分析系统及其应用”，日本焊接学会春季会议。

H.Okada: "Case Studies on Structural Reliability of Marine Structures Based on Collapse Mode Analysis" Proc.,International Conference fo New Ship Technology into 21st. Century(Shanghai,China). 299-306 (1994)

H.Okada：“基于塌陷模式分析的海洋结构的结构可靠性案例研究”论文集，船舶新技术国际会议21日。

H.Okada: "A Method for Plastic Collapse and Reliability Andlysis of Thin Plate Structures Using Lumped Plasticity Models" Proc.,5th.International Sympisium on Plasticity and Its Current Applications (Sakai,Japan,発表予定). (未定). (1995)

H. Okada：“使用集总塑性模型进行薄板结构塑性塌陷和可靠性分析的方法”，第五届国际塑性及其当前应用研讨会（日本堺市，待发表）。 （1995）

上田幸雄、岡田博雄、正岡孝治: "選択的固有関数による矩形板の座屈荷重推定法" 関西造船協会誌. 223. 133-138 (1995)

Yukio Ueda、Hiroo Okada、Koji Masaoka：“使用选择性特征函数的矩形板的屈曲载荷估计方法”关西造船协会杂志 223. 133-138 (1995)。