Experimental investigations into the collapse behavior of a box-shape hull girder subjected to extreme wave-induced loads are presented.The experiment was performed using a scaled model in a tank.In the middle of the ...Experimental investigations into the collapse behavior of a box-shape hull girder subjected to extreme wave-induced loads are presented.The experiment was performed using a scaled model in a tank.In the middle of the scaled model,sacrificial specimens with circular pillar and trough shapes which respectively show different bending moment-displacement characteristics were mounted to compare the dynamic collapse characteristics of the hull girder in waves.The specimens were designed by using finite element(FE)-analysis.Prior to the tank tests,static four-point-bending tests were conducted to detect the load-carrying capacity of the hull girder.It was shown that the load-carrying capacity of a ship including reduction of the capacity after the ultimate strength can be reproduced experimentally by employing the trough type specimens.Tank tests using these specimens were performed under a focused wave in which the hull girder collapses under once and repetitive focused waves.It was shown from the multiple collapse tests that the increase rate of collapse becomes higher once the load-carrying capacity enters the reduction path while the increase rate is lower before reaching the ultimate strength.展开更多
理想化结构单元法(ISU M )已经成为评估结构系统中承受载荷能力的一个有效工具。本文给出了最新的ISU M 板元公式,并考虑了双轴向推力和横向载荷对板元的加载。为了精确地模拟加筋板的性能,分别用梁—柱元和板元制作了肋材和板材的模型...理想化结构单元法(ISU M )已经成为评估结构系统中承受载荷能力的一个有效工具。本文给出了最新的ISU M 板元公式,并考虑了双轴向推力和横向载荷对板元的加载。为了精确地模拟加筋板的性能,分别用梁—柱元和板元制作了肋材和板材的模型。与有限元分析(FEA )的比较表明该方法对解决加筋板在横向压力和推力载荷下的问题是适用的。对箱形桁材的四点弯曲试验的分析表明与试验数据吻合良好。展开更多
基金Supported by the Ministry of Education, Science, Sports, and Culture, Grant-in-aid for Scientific Research (A), (23246150), 2011
文摘Experimental investigations into the collapse behavior of a box-shape hull girder subjected to extreme wave-induced loads are presented.The experiment was performed using a scaled model in a tank.In the middle of the scaled model,sacrificial specimens with circular pillar and trough shapes which respectively show different bending moment-displacement characteristics were mounted to compare the dynamic collapse characteristics of the hull girder in waves.The specimens were designed by using finite element(FE)-analysis.Prior to the tank tests,static four-point-bending tests were conducted to detect the load-carrying capacity of the hull girder.It was shown that the load-carrying capacity of a ship including reduction of the capacity after the ultimate strength can be reproduced experimentally by employing the trough type specimens.Tank tests using these specimens were performed under a focused wave in which the hull girder collapses under once and repetitive focused waves.It was shown from the multiple collapse tests that the increase rate of collapse becomes higher once the load-carrying capacity enters the reduction path while the increase rate is lower before reaching the ultimate strength.
文摘理想化结构单元法(ISU M )已经成为评估结构系统中承受载荷能力的一个有效工具。本文给出了最新的ISU M 板元公式,并考虑了双轴向推力和横向载荷对板元的加载。为了精确地模拟加筋板的性能,分别用梁—柱元和板元制作了肋材和板材的模型。与有限元分析(FEA )的比较表明该方法对解决加筋板在横向压力和推力载荷下的问题是适用的。对箱形桁材的四点弯曲试验的分析表明与试验数据吻合良好。
