落物撞击海洋平台中撞击位置对结构响应的影响  

The Influence of Impact Position to the Offshore Platform Response under Impact Load

作　　者：周国宝[1] 王林[1] 渠延模[2] 万乐坤 

机构地区：[1]江苏科技大学土木工程与建筑学院,镇江212003 [2]江苏省建筑工程质量检测中心有限公司,南京210008 [3]日本船级社(中国)有限公司上海分公司,上海200336

出　　处：《科学技术与工程》2012年第32期8507-8512,共6页Science Technology and Engineering

摘　　要：利用有限元仿真软件MSC/Dytran从碰撞力、能量转化及结构损伤等方面,分析了下落物体撞击导管架海洋平台甲板结构过程中撞击位置的变化对平台结构响应的影响。将撞击位置按边界条件和垂向碰撞刚度的不同分类,分析不同边界条件、不同垂向刚度对平台结构损伤的影响。研究结论表明:撞击区域边界条件的不同对撞击力和能量的吸收转化影响不大,但损伤变形有所差别;撞击位置的不同对撞击力有影响,各撞击力曲线的起伏和峰、谷点的位置都有所不同;撞击位置不同,相应的各构件的吸能比例也不同,但对结构总体吸能的影响不大;撞击位置不同导致结构损伤过程的变化,并影响到构件的损伤模式和失效次序。By using finite element simulation software MSC/Dytran, the influence of impact positions deck to the offshore platform response under impact load by impact force, energy conversion and structural on the damage are analysied. Impact positions were classified in accordance with boundary conditions and vertical stiffness, and the influence of different vertical stiffness and different boundary conditions to platform were analyzed. The results 2. of the study show that： the different boundary conditions have little influence to impact force, energy conversion, but structural damage has some differences; different impact positions have influence to the platform, the impact force curves are different to different positions; because of different impact positions, the energy absorbing are different to the same component, but has little influence to total energy absorbing; because of different impact positions, the damage processes are changed, it also influences the damage mode and disabled order.

关 键 词：落物 海洋平台 撞击位置 数值仿真 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]