摘要
针对船舶耐撞特性研究问题的特点,提出进行结构碰撞相似律研究的必要性和重要性。利用相似理论分析了碰撞过程的相似参数,建立了船舶结构耐撞性研究中的相似律关系。在此基础上以平板结构撞击特性研究为计算模型,应用显式有限元程序MSC/Dytran对满足比例关系的撞击过程进行数值仿真计算。计算结果表明,原型与比例模型的撞击响应特性符合相似律。考虑到船用材料的率相关性,针对相似加筋圆柱壳结构进行撞击比较分析,认为由于高强度低合金结构钢的率效应不敏感,且撞击载荷速度较低,相似律仍然成立。
The necessity and significance of the analogue rule for ship structure collisions have been discussed based on the characteristic of this topic. Using the analogue theory, the analogue parameters of ship collision are analyzed and put forward, and the relationship of analogue for ship collision have been built. In order to verify this relationship, a calculation example for two panels has been carried out by FEM code-MSC/Dytran. And the results show that, there is an agreement between the prototype and the scaling structure according to the analogue rule. Considering the strain-rate-effect of material, the colli- sion calculation for two analogue stiffened cylinder have been comparatively analyzed. Besides, because the strain rate sensitivity of this type structure steel is poor and the velocity of ship collision is low commonly, the analogue rule is still adapted in this case.
出处
《中国舰船研究》
2009年第3期38-41,61,共5页
Chinese Journal of Ship Research
关键词
船舶碰撞
相似律
数值仿真
ship collision
analogue rule
numerical simulation
