利用ABAQUS软件分析砂质海底管道稳定性

利用美国HKS公司的ABAQUS有限元计算程序,对裸置在海床上的管道进行分析.在计算中,采用程序中所规定的接触面来考虑管道与土体的相互作用,得到了比较好的结果

The analysis of pipelines' Penetration Laid on the Elastic-Plastic Seabed Based on the ABAQUS Software

The pipeline's stability is the key problem of submarine pipeline's design. In order to supply the theory basis for the pipeline's design, the ABAQUS software has been adopted to analyze the pipe/soil system. The Ramberg-Osgood model has been adopted to simulate the seabed; the contact pair also adopted to simulate the pipe/soil system, the dynamic boundary contact problem of pipe embedded into the seabed has been analyzed. The computation has been operated according to change pipe's subweight, environment load, pipe's diameter, yielding stress and so on. The computation results have shown that these parameters have effects on the pipe's penetration

钻杆管体体积型缺陷的有限元分析

利用有限元软件 ,采用三维线性静态方法 ,对常用的 12 7mmIEU钻杆在常见的 11种蚀坑类型下的应力分布进行了计算。计算结果显示钻杆管壁常见蚀坑的应力集中系数在 1 5～2 5之间 ,拉伸和弯曲载荷作用下蚀坑应力分布基本一致 ,弯曲载荷的分析完全可以采用拉伸载荷结果来替代。对一系列的计算结果通过最小二乘法拟合出蚀坑应力集中系数随蚀坑深度和宽度的数学关系表明 ,拟合曲线与计算结果有非常好的一致

封面图片说明——新型平台结构隔振技术

封面图片为隔振控制技术实施后的渤海北高点JZ20- 2NW生产平台.海上冬季浮冰激励引起采油平台的剧烈振动一直是困扰渤海油田开发的难题,检测数据表明,平台振动的瞬时最大加速度峰值达到了0.2 g,对生产和平台安全造成了极大威胁。为此在国家十五863项目"新型平台抗冰振技术研究"

大射电望远镜馈源支撑系统索拖动响应分析

根据500m口径球面射电望远镜(FAST)设计方案,基于系统动力学建模方法,建立了馈源支撑系统的机械模型。采用此模型进行了拖动状况下系统的动力响应分析,研究了不同拖动速度及阻尼索各种阻尼取值下馈源的动力响应。同时对拖动扰动及风载荷的对系统响应的影响情况进行了对比分析,研究结果可为此项目最终方案的选择提供参

大射电望远镜馈源支撑系统动力响应分析

根据500米口径球面射电望远镜(FAST)原始设计方案,基于多体系统动力学建模方法,建立了其馈源支撑系统的动力学模型,同时建立了系统环境激励模型—随机风载模型。对整体模型进行了动力响应分析。通过不同风速状况的对比分析,给出了系统响应的变化范围,为此项目最终方案的选择提供参考

大射电望远镜馈源支撑系统建模与仿真

根据500m口径球面射电望远镜(FAST)原始设计方案,基于多体系统动力学建模方法,建立了馈源支撑系统的机械模型,并对此模型进行了动力响应分析,为此项目最终方案的选择提供了参考

The analysis of pipeline's penetration laid on the elastic-plastic seabed based on the abaqus software

The pipeline's stability is the key problem of submarine pipeline's design. In order to supply the theory basis for the pipeline's design, the ABAQUS software has been adopted to analyze the pipe/soil system. The Ramberg-Osgood model has been adopted to simulate the seabed; the contact pair also adopted to simulate the pipe/soil system, the dynamic boundary contact problem of pipe embedded into the seabed has been analyzed. The computation has been operated according to change pipe's subweight, environment load, pipe's diameter, yielding stress and so on. The computation results have shown that these parameters have effects on the pipe's penetration. © (2013) Trans Tech Publications, Switzerland

The Numerical Simulation of Pipe/Soil Interaction Under Wave Loadings

The on-bottom stability of submarine pipeline is a key problem of submarine pipeline design.The key issue is to simulate the interaction among wave,pipe and soil. In this paper, the constitutive models of soil, such as nonlinear elastic, porous elastic and Ramberg-Osgood models are adopted respectively, and the pipe/soil interaction has been analyzed by the common finite element software ABAQUS program. The contact surfaces have been established. The factors such as contact effect, frictional coefficient between pipe and soil, pipe's penetration, the impact of yielding stress are considered. Also, the results show that the computation of the pipe/soil interaction is feasible and may provide a helpful tool for the engineering practice of pipeline on-bottom stability design