深海采矿扬矿管几何非线性静力分析  

Geometry nonlinear static force analysis of transporting pipe in deep-sea mining

作　　者：徐海良[1] 周刚[1] 吴万荣[1] 吴波[1] 

机构地区：[1]中南大学机电工程学院高性能复杂制造国家重点实验室,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2011年第11期3352-3358,共7页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(50975290);中南大学中央高校基本科研业务费专项资金资助项目(2011QNZT057);湖南省自然科学基金资助项目(11JJ5028)

摘　　要：针对深海采矿输送系统中阶梯扬矿管承受轴向力过高容易断裂和连接部位容易出现应力集中的问题,提出一种低密度和高强度的碳纤维复合管应用于深海采矿输送系统。根据扬矿管在采矿船静止和等速拖航运动时,受到管道和管内流体重力、浮力和海水阻力作用的情况,采用有限元对碳纤维复合管和阶梯钢管进行计算分析。研究结果表明:当采矿船静止时,碳纤维复合管的弯矩和弯曲应力与阶梯钢管的差别很小,但碳纤维复合管的轴向力不到阶梯钢管的1/4,相比阶梯钢管,碳纤维复合管能承受更大的轴向载荷;当采矿船以0.5 m/s等速拖航时,2种扬矿管的轴向力、弯矩相比采矿船静止时变化不大,但碳纤维复合管的弯曲应力比阶梯钢管小一半,可克服阶梯管刚性连接时弯曲应力过大的缺点。Considering the fact that the ladder pipe in deep-sea mining transporting system is likely to break down under high axial force and the connect parts tend to be stress concentration,a kind of low density was put forward,and high intensity carbon fiber composite pipe is applied to deep-sea mining transporting system.Based on the fact that the transporting pipe is under the inter-action of the draft of mining ship,the gravity of the transporting pipe and the inner liquid as well as buoyancy,carbon fiber composite pipe and steel ladder pipe were analyzed.The results show that when the mining ship is motionless,carbon fiber composite pipe＇s bending moment and bending stress are equal to steel ladder pipe＇s,but its axial force is less than one fourth of steel ladder pipe＇s and it can take larger axial force than steel ladder pipe.When the mining ship moves with constant peed of 0.5 m/s,the axial force,bending moment and bending stress of the two pipes are almost the same as the condition that the mining ship is motionless,but carbon fiber composite pipe＇s bending stress is less than half of steel ladder pipe＇s,and it can overcome the defect of overlarge bending stress when ladder pipe is rigid connected.

关 键 词：碳纤维复合管 几何非线性 有限元 深海采矿 扬矿管 

分 类 号：TH6[机械工程—机械制造及自动化] TD403[矿业工程—矿山机电]