Progressive Collapse Behavior of Ship Hull and Efficient Method of Its Analysis

船体渐进倒塌行为及其有效分析方法

基本信息

批准号：
16206085
负责人：
FUJIKUBO Masahiko
金额：
$ 14.39万
依托单位：
Hiroshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16206085/
关键词：
Ship Structure Buckling Strength Ultimate Strength Idealized Structural Unit Method Finite Element Method Dynamic Explicit Method Progressive Collapse Behavior Initial Welding Imperfection 縦曲げ最終強度並列処理座屈・塑性崩壊挙動溶接残留応力水圧荷重

项目摘要

An efficient method of progressive collapse analysis of ship structural members and systems was pursued in this study from two different aspects, one is the extension of Idealized Structural Unit Method (ISUM) and the other is the application of dynamic explicit method to quasi-static Finite Element Analysis (FEA). In ISUM, the structure is discretized into possible largest elements and the nonlinear behavior of such elements due to yielding and large deflection is idealized by appropriate shape functions and yielding criteria. The degree of freedom to solve for is therefore significantly reduced compared to FEA, resulting inthe reduction of computational efforts and time. The major achievements in this study can be summarized as follows:(1) ISUM rectangular plate element was extended so that the lateral pressure can be considered as well as the thrust loads. It was also made possible to consider the effect of welding residual stresses both in plate and in stiffener. The progressive co … More llapse analysis of a ship cross section under pure bending was performed, and a good accuracy and an efficiency of ISUM were demonstrated. CPU time required for ISUM was about 1/70 of that for FEA.(2) ISUM girder element for the progressive collapse analysis of double hull structure was developed. The effect of cutouts in the floor or girder can be considered by appropriately selecting integration points for the calculation of stiffness matrices. The progressive collapse analysis of a double bottom structure subjected to uniform lateral pressure showed the efficient and accurate applicability of the proposed ISUM model. CPU time required for ISUM was about 1/70-1/100 of that for FEA.(3) The loading condition necessary for the quasi-static FEA using dynamic explicit approach was discussed. It was shown that the condition is given as a function of natural period corresponding to the natural vibration mode resembling the buckling mode.(4) Cyclic bending test of a box-girder specimen was performed to investigate the cyclic collapse behavior including the initiation of a low cycle fatigue cracking after panel buckling. A comparison between test and ISUM analysis exhibited the satisfactory accuracy of ISUM analysis. Less

在这项研究中，从两个不同的方面进行了对船舶结构成员和系统进行渐进式崩溃分析的有效方法，一种是延伸理想化的结构单位方法（ISUM），另一个是将动态显式方法应用于准静态有限元分析（FEA）。在ISUM中，该结构被离散为可能的最大元素，并且由于屈服和大挠度而引起的此类元素的非线性行为是通过适当的形状函数和产生标准的理想选择的。因此，与FEA相比，解决的自由度大大降低，从而减少了计算工作和时间。这项研究中的主要成就可以总结如下：（1）（1）扩展了ISUM矩形板元件，以便可以考虑横向压力以及推力载荷。还可以考虑在板和加劲肋中焊接残留应力的效果。进行了纯弯曲下的船舶横截面分析的渐进性分析，并证明了ISUM的良好准确性和有效性。 ISUM所需的CPU时间约为FEA的1/70。（2）开发了双船体结构进行性塌陷分析的ISUM齿轮元素。可以通过适当选择计算刚度材料的集成点来考虑切口或齿轮中切口的效果。对受均匀侧向压力的双底结构进行的渐进性塌陷分析表明，所提出的ISUM模型的有效且准确的适用性。 ISUM所需的CPU时间约为FEA的1/70-1/100。（3）讨论了使用动态显式方法进行准静态FEA所需的加载条件。结果表明，该条件是与自然振动模式相对应的自然周期的函数。（4）执行了盒子束可能的循环弯曲测试，以调查循环崩溃行为，包括在面板屈曲后的低周期疲劳开裂的启动。测试和ISUM分析之间的比较表现出ISUM分析的满意度厂的准确性。较少的

项目成果

期刊论文数量（26）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Progressive Collapse Analysis of Ship's Hull Girder in Longitudinal Bending Using Idealized Structural Unit Method

DOI：
10.2534/jjasnaoe.1.187
发表时间：
2005
期刊：
影响因子：
0
作者：
M. Fujikubo;Zhiyong Pei
通讯作者：
M. Fujikubo;Zhiyong Pei

Applicability of Explicit Dynamic Method to Quasi-Static Analysis of Plates

显式动力学方法在板准静态分析中的适用性

DOI：
发表时间：
2005
期刊：
Proceeding of Conference of Japan Society of Naval Architecture and Ocean Engineers Vol.2W
影响因子：
0
作者：
千賀英敬;小寺山亘;今石大輔;Ken MOTOKURA;Shigenobu Okazawa et al.
通讯作者：
Shigenobu Okazawa et al.

Development of ISUM Plate Element Considering Lateral Pressure Effects and Its Application to Stiffened Plates

考虑侧压效应的ISUM板单元的研制及其在加筋板中的应用

DOI：
发表时间：
2005
期刊：
西部造船会会報 109
影响因子：
0
作者：
Ishihara;D. ; Wada;T. ; Onaka;T;; Matsuhara;H. ; Kataza;H. ; Ueno;M. ; Fujishiro;N. ; Kim;W. ; Watarai;H. ; Uemizu;K. ; Murakami;H. ; Matsumoto;T. ; Yamamura;I.;Masahiko Fujikubo
通讯作者：
Masahiko Fujikubo

理想化構造要素法による船体の縦曲げ逐次崩壊解析

理想化结构单元法船体垂直弯曲连续倒塌分析