配重变化对重力式网箱网衣水动力特性影响数值分析(英文)  

Numerical analysis of effects of sinker weight on hydrodynamics behaviour of gravity cage net

作　　者：赵云鹏[1] 李玉成[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《大连理工大学学报》2006年第z1期198-205,共8页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(50279002);国家"八六三"高技术资助项目(2001AA623010;2003AA623010);长江学者奖励计划资助项目(IRT0420)~~

摘　　要：利用集中质量方法建立了模拟水流作用下网衣动态变形的数学模型．利用此模型分析了重力式网箱在均匀流作用下,不同的配重重量对其受力和变形的影响．对不同流速不同配重大小情况下重力式网箱网衣所受荷载和变形进行了模拟．为了验证数学模型的有效性和数值模拟结果的正确性,将模拟结果与Lader等的试验结果进行了比较．结果表明计算和试验结果吻合良好,各种工况和配重条件下计算结果相对误差都在15％以内．该研究结果为水流条件下网箱的数值模拟奠定了基础．A dynamic model for 3D net structures exposed to current is proposed based on lumped masses method. The model is used to analyze the influences on the net of gravity sea cage by the different sinker weights in uniform flow. Under different current velocities, the deformations and loads of net of gravity sea cage with different sinker weights are calculated respectively. According to the results of simulation, the volume losses and drag forces of the net cage under different velocities and sinker weights are estimated. In order to verify the validity of the numerical results, the numerical simulation results are compared with Lader s experimental ones. The comparison shows that the agreement is within a range of 15% under different velocities and sinker weights.

关 键 词：网箱 数值模拟 集中质量方法 沉子重量 

分 类 号：TV139.2[水利工程—水力学及河流动力学]