船舶搁浅于台型礁石中的等效板厚法研究  

INVESTIGATION ON SMEARED THICKNESS METHOD FOR SHIP GROUNDING OVER OBSTACLES WITH LARGE CONTACT SURFACE AND TRAPEZOIDAL CROSS-SECTION

作　　者：刘毅[1] 王晋[1] 胡志强[1] 

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200240

出　　处：《工程力学》2013年第8期287-293,304,共8页Engineering Mechanics

基　　金：上海交通大学海洋工程国家重点实验室青年创新基金课题项目(GKZD010056-12)

摘　　要：给定油船双层底结构在具有较大接触面的台型障碍物上发生滑移的搁浅场景,利用等效板厚法对该过程的搁浅性能进行研究。Paik提出的等效板厚计算公式中,扶强材影响系数k是衡量扶强材的作用的重要参数。该文对扶强材影响系数k取值进行了全面深入的研究。通过有限元数值仿真技术进行研究,选取一个油轮舱段的双层底结构为研究对象,并建立了两个有限元模型:含有扶强材的模型与采用等效板厚法简化后的模型。利用数值仿真计算结果对比研究,确定了不同撞深和礁石角度条件下系数k的取值。研究成果为扶强材影响系数取值提供了计算依据,提高了等效板厚法分析船舶的搁浅性能的预报精度。An investigation on smeared thickness method used in prediction of grounding characters for double bottom tanker over obstacles with large contact surface and trapezoidal cross-section is conducted. Paik calculates the smeared thickness by adding a parameter k to consider the property of stiffeners on the plating. In order to decide the parameter k, detailed research is conducted in this paper by using numerical simulation technique. A hold of a double bottom tanker is chosen as the object. Two finite element models are built, one with stiffeners and the other without stiffeners but with smeared plate thickness. With the comparison of simulation results, the feasibility of the smeared thickness method is verified. The suitable values of parameter k in smeared thickness method are determined for different indentation and slope angle cases. The research provides a basis for determination of the parameter k, which improves accuracy for predicting ship grounding characters by smeared thickness method.

关 键 词：船舶搁浅 数值仿真 等效板厚法 扶强材 简化模型 

分 类 号：U663.1[交通运输工程—船舶及航道工程] U661.43[交通运输工程—船舶与海洋工程]