摘要
采用大型的通用有限元软件对管土系统进行分析。采用Ramberg-Osgood弹塑性模型模拟海床土体,采用"接触对"(contact pair)的算法处理管土接触面,数值模拟显示,随着管道水下重力的增大,管道下方土体的塑性区域逐渐扩展,相应的管道沉降量也逐渐增大,并明显高于弹性模型的计算值。通过改变管道参数进行对比计算,结果表明,这些参数对管道的沉降量、摩擦力、极限阻力都有一定程度的影响。
The pipe-soil interaction was analyzed by ABAQUS. The plastic-elastic model was adopted to simulate the sea- bed, and the contact pair method was adopted to simulate the pipe-soil contact surface to solve the problem of dynamic boundary contact. The simulation results showed that the plastic area under the pipe will expand, the pipeline＇s penetration will increase and larger than that of elastic model with the increase of pipeline＇s subweights. The computations were carried out by changing the pipeline＇s subweights, horizontal loads, pipeline＇s diameters and yielding stress. The numerical results showed that these parameters have different effects on the pipeline＇s penetration, frictional force and extreme resistance.
出处
《船海工程》
2013年第5期185-189,共5页
Ship & Ocean Engineering
基金
北京市属高等学校高层次人才引进与培养计划
