| 基于黏聚单元法计算分析海洋平台锥形立柱冰载荷 |
| |
| 引用本文： | 詹开宇,曹留帅,万德成.基于黏聚单元法计算分析海洋平台锥形立柱冰载荷[J].海洋工程,2021,39(4):62-69. |
| |
| 作者姓名： | 詹开宇 曹留帅 万德成 |
| |
| 作者单位： | 上海交通大学 船海计算水动力学研究中心(CMHL) 船舶海洋与建筑工程学院, 上海 200240 |
| |
| 基金项目： | 国家自然科学基金（51879159）；国家重点研发计划项目（2019YFB1704200，2019YFC0312400） |
| |
| 摘 要： | 基于非线性有限元分析方法和LS-DYNA计算软件,使用黏聚单元法建立层冰的数值模型,并进行了层冰与锥形立柱相互作用的数值模拟,研究抗冰锥角、冰厚等参数对立柱所受冰载荷的影响。模拟结果与实测和试验结果吻合良好。研究结果表明:使用黏聚单元法建立的层冰模型可以较好地模拟出层冰的破碎和堆积过程,冰载荷计算结果与ISO冰力标准结果以及离散单元法计算结果吻合较好;锥形立柱的抗冰锥角大小对冰载荷影响明显,随着锥角增大,水平方向的最大冰力增大而竖直方向上最大冰力减小;锥形结构改变了碰撞过程中层冰的破坏形式;结构物所受冰力大小与层冰厚度呈正相关,且增加速度接近线性。
|
| 关 键 词： | 层冰 锥形结构物 黏聚单元法 冰载荷 抗冰锥角 冰厚 极地 海洋平台 |
| 收稿时间： | 2020/7/27 0:00:00 |
Cohesive element method for ice load on conical structures |
| |
| ZHAN Kaiyu,CAO Liushuai,WAN Decheng.Cohesive element method for ice load on conical structures[J].Ocean Engineering,2021,39(4):62-69. |
| |
| Authors: | ZHAN Kaiyu CAO Liushuai WAN Decheng |
| |
| Institution: | Computational Marine Hydrodynamics Lab (CMHL), School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China |
| |
| Abstract: | Based on nonlinear finite element analysis method and LS/DYNA, a numerical model of level ice was established by using cohesive element method. The simulation of the interaction between level ice and conical column was carried out to study the influence of cone angle, ice thickness and other parameters on ice load. The simulation results are in good agreement with the experimental results. The results show that the cone angle has an obvious influence on ice load. With the increase of cone angle, the maximum ice force in horizontal direction increases and the maximum ice force in vertical direction decreases. The conical structure changes the destruction form of level ice during the collision. The ice force of the structure is positively correlated with the thickness of level ice, and the increase velocity is nearly linear. |
| |
| Keywords: | level ice conical structure cohesive element method ice load cone angle ice thickness palar region offshore platform |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《海洋工程》浏览原始摘要信息 |
| 点击此处可从《海洋工程》下载免费的PDF全文 |
|
