试样极限塑性和船舶触礁模型试验校准计算

Benchmark Study of Tensile Coupon Test and Model Test of Ship Grounding

船舶碰撞与搁浅时的结构损伤是一个复杂的动态非线性过程。国际船舶与离岸结构会议碰撞与搁浅委员会 (ISSC V .3)组织其成员进行了两项专题研究 :(1)材料极限塑性极限应变试验数据用于有限元模型计算时的尺度修正系数 ;(2 )各种计算方法用于船舶搁浅 (触礁 )计算的准确性。介绍了作者承担上述两项研究的成果 ,给出了极限塑性极限应变的尺度修正系数的计算方法和结果 。

Damage of ship collision and grounding is a complex dynamic nonlinear process. The committee of ship collision and grounding of International Ship & Offshore Structures Congress (ISSC V.3) organized its members to make two special researches:(1) The scale revising coefficient of the test data of material ultimate plastic strain when they are used in FEM calculation;(2) The accuracy of various methods to study ship grounding.In this paper,the results of the above two researches attained by the authors are presented.The calculation method and result of the scale revising coefficient of the test data of material ultimate plastic strain are given and the accuracy of the nonlinear explicit FFM and the program MSC/Dytran to calculate ship grounding is examined.