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文章研究了在波流水动力荷载作用下海洋非金属管道管土接触的在位稳性。通过嵌入UWAVE子程序的ABAQUS施加考虑升力的水动力荷载,编写基于Zhang理论弹塑性模型自定义管土接触单元,对管道进行动态分析。结果发现管道的应力应变处于较低水平,在位状态失效不是由强度破坏造成的;不考虑升力将使管道陷深增大,侧向位移受到约束。最后做了参数分析,包括管道安装过程中的集中荷载效应、海床土壤类型及考虑海床不平整造成的悬跨段长度。
In this paper, the in-situ stability of pipe-soil contact of marine non-metallic pipe under hydrodynamic loads is studied. Through the ABAQUS embedded in the UWAVE subroutine, hydrodynamic loads considering the lift are applied. A pipe-soil contact unit based on the Zhang theory elastic-plastic model is prepared and the pipeline is dynamically analyzed. The results show that the stress and strain of the pipeline are at a low level, and the failure of the in situ state is not caused by the strength failure. The lift of the pipeline will be increased without considering the lift and the lateral displacement will be restrained. Finally, the parametric analysis was done, including the concentrated load effect during pipe installation, the type of soil on the seabed, and the length of the suspension span caused by the unevenness of the seabed.