STUDIES ON RELIABILITY ANALYSIS SYSTEMS OF SHIP HULL STURCTURES

船体结构可靠性分析系统的研究

• 批准号: 03302038
• 负责人: OKADA Hiroo
• 金额: $ 5.31万
• 依托单位: UHIVERSITY OF OSAKA PREFECTURE
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Co-operative Research (A)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03302038/
• 关键词: Ship hull structures; Buckling and compressive strength; Effects of in-plane stress and lateral pressure; Structural reliability; Ultimate collapse modes; Importance of parameters; Fatigue strength; Corrosion and deterioration; 板・骨組複合構造; 熱荷重; 面内

This study is concerned with structural reliability analysis systems of ship hull structures. Results obtained in this study are summarized as follows :1. Reliability analysis for compressive strengths of stiffened panels under longitudinal bending stress and lateral pressure is performed at various parts of the hull girder. The results for various strength equations are compared from a viewpoint of reliability. Effects of some design parameter sensitivity analysis for the reliability index.2. The features of structural reliability of a large bulk carrier (150,000DWT) based on the collapse mode analysis are investigated by successively applying the newly developed system for plate structures using a spatial membrane element model in the previous studies.3. From the analytical results, effects of shearing stress and lateral pressure on dominant collapse modes including damages of side shell elements and their occurrence probabilities in the fore/aft L/4 parts of the ship hull structure are more remarkable than in the midship part.4. It is also pointed out that anothert results for deteiorated stuctures considering the notional corrosion damage referred to the classNK report report are in comparatively good correspondence to the features of structural damages due to corosion at fore/aft parts of aged bulk carriers.5. A new system for combined frameworks and plate structures is considered to offer the expansion of applicability of structural system reliability of marine structures.6. A method using varying load simulation techniques is also developed for fatigue reliability analysis of marine space structures under nonlinear and irregular wave induced loads.

本文研究的是船体结构可靠性分析系统。主要研究成果如下：1.对加筋板在纵向弯曲应力和横向压力作用下的强度进行了可靠性分析。从可靠性的角度对各种强度方程的结果进行了比较。部分设计参数敏感性分析对可靠性指标的影响。利用前人建立的基于空间膜单元模型的平板结构分析系统，对某大型散货船(150,000吨)进行了基于倒塌模式分析的结构可靠性分析。从分析结果来看，剪应力和侧压力对船体结构首尾L/4部分的主要破坏模式(包括侧壳单元的损伤及其发生概率)的影响比船中部分更为显著。还指出，考虑ClassNK报告中提到的概念腐蚀损伤的另一种结构损伤结果与老龄散货船首尾部分腐蚀引起的结构损伤特征具有较好的一致性。提出了一种新的框架-板组合结构体系，为海洋结构体系可靠性的适用范围提供了扩展。提出了一种基于变载荷模拟技术的船用空间结构在非线性和不规则波浪载荷作用下的疲劳可靠性分析方法。

项目成果

岡田博雄、他: "浮体係留式原油生産システムと軽量化船の構造信頼性評価に閲する研究" 第11回海洋工学シンポジウム論文集 (日本造船学会). 217-224 (1992)

Hiroo Okada等：“浮式系泊原油生产系统及轻型船舶的结构可靠性评估研究”第11届海洋工程学会论文集（日本造船学会）217-224（1992）。

Yao, T., et al.: "Progressive Collapse Analysis of a Ship's Hull under Longitudinal Bending (2nd, Report)" Journal of the Society of Naval Architects of Japan. 449-461 (1992)

Yao, T., et al.：“纵向弯曲下船体的渐进式倒塌分析（报告第 2 期）”日本造船学会杂志。

Kitaura, K., et al.: "Impact Fatigue Behavior of Friction Welded Butt Joints of Alminium Alloy A6061 under Low-Cycle Tesile Loads" Proc., 83rd. Autumn Meeting of the Soc.of Light Metals. 223-224 (1992)

Kitaura, K. 等人：“低周拉伸载荷下铝合金 A6061 摩擦焊接对接接头的冲击疲劳行为”Proc.，第 83 期。

Okada, H., et al.: "A Method for Collapse and Reliability Analysi of Ship Hull Structures by Using Spatial Plate Structure Models" Proc., 11th.Symp.on Materials and Srtuctural Reliability (The Soc. of Materials Science of Japan). 60-65 (1992)

Okada, H., et al.：“A Method for Collapse and Reliability Analysi of Ship Hull Structures by using Spatial Plate Structure Models” Proc., 11th.Symp.on Materials and Structural Reliability（日本材料学会）

Ueda, Y.and Masaoka.K.: "Ultimate Strength Analysis of Thin Plated Structures Using Eigen-Functions - (1st. Report) Rectangular Plate Element Subjected to Compression and Shear-" 439-445 (1993)

Ueda, Y. 和 Masaoka.K.：“使用本征函数对薄板结构进行极限强度分析 -（第 1 份报告）承受压缩和剪切的矩形板单元”439-445 (1993)