水下绞笼式挖沟机机械开挖数值分析  

Numerical analysis of trenching mechanics by a submarine hinged cage trencher

作　　者：王亮[1] 李军营[2] 卢正超 尚智敏 季春光[1] 张其一[3] WANG liang;LI Junying;LU Zhengchao;SHANG Zhimin;JI Chunguang;ZHANG Qiyi(Offshore Oil Engineering Co.,Ltd.,Tianjin 300456,China;Tianjin Jingyan Construction Machinery Transmission Co.,Ltd.,Tianjin 300409,China;College of Engineering,Ocean University of China,Qingdao 266100,China)

机构地区：[1]海洋石油工程股份有限公司,天津300456 [2]天津市精研工程机械传动有限公司,天津300409 [3]中国海洋大学工程学院,山东青岛266100

出　　处：《石油工程建设》2022年第1期72-76,共5页Petroleum Engineering Construction

摘　　要：海底管道是海洋油气田开发中输送油气资源的重要设施,为维持其自身安全和在位稳定性,必须将海底管道埋设到预定的深度,海底挖沟机是埋设海底管道和电缆的重要设备。采用非线性流固耦合算法,对机械绞笼切削土体进行了深入求解,分析了绞笼开沟过程中的切削荷载变化规律,研究了开沟过程中土体的变形规律与破坏机理。数值计算结果表明:开沟过程中绞笼的切削荷载随着绞笼转速的增大而减小;绞笼刃板上钭齿的刚度与摩擦特性对切削荷载影响较为显著;绞笼内部螺旋导料板也较为明显地影响着切削荷载。最后,针对数值计算结果,给出了绞笼切削荷载计算公式,能够较为准确、高效地对绞笼式挖沟机切削荷载进行计算,在工程应用方面具有一定的参考价值。Submarine pipelines are important facilities for transporting oil and gas resources in the development of offshore oil and gas fields,which must be buried to a predetermined depth to maintain their safety and stability.A submarine trencher is important equipment for embedding submarine pipelines and cables.This paper employed a nonlinear fluid-solid coupling algorithm to deeply solve the soil cutting by a mechanical hinged cage and analyzed the variation law of the cutting load as well as the deformation law and failure mechanism of soil in the process of trenching.The numerical results show that the cutting load of the hinged cage decreases with the increase in the cage speed;the rigidity and friction characteristics of the inclined teeth on the edge plate of the cage have a significant influence on the cutting load;the cutting load is greatly affected by the spiral guide plate in the cage.Finally,according to the numerical results,this paper provides a practical calculation formula for the cutting load of a hinged cage,which can calculate the cutting load of the hinged cage trencher accurately and efficiently and has good reference value in practical engineering applications.

关 键 词：绞笼式挖沟机 流固耦合 数值仿真 切削荷载 破坏机理 

分 类 号：TE973.8[石油与天然气工程—石油机械设备]