ABSTRACT

The transfer characteristic of the CT’s axial load is necessarily investigated for its safety operation. In this study, a mechanical model of the coupled tube systems is described using micro element method. To analyse the effects of ocean loads, an experimental downsized platform is built. A physical vibration exciter is used to simulate the SCR’s lateral vibration, and then the axial load and its transfer efficiency of the CT are obtained under the excitation frequencies of 3, 6, 9 Hz and excitation forces of 30, 50, 70 N. Experimental results show that the excitation forces and excitation frequencies within certain ranges would promote the transmission of the axial force of the inner pipe. The force-outs under excitation frequencies and excitation forces are greater than that under no force excitation, and the transfer efficiencies of axial force will increase with the growth of the excitation forces and excitation frequencies.

摘要

CT轴向载荷的传递特性需要对其安全运行进行研究。在这项研究中，使用微元方法描述了耦合管系统的机械模型。为了分析海洋载荷的影响，建造了一个实验性的缩小平台。用物理激振器模拟SCR的横向振动，得到激振频率3、6、9Hz、激振力30、50、70N下CT的轴向载荷及其传递效率。 实验结果表明，一定范围内的激振力和激振频率会促进内管轴向力的传递。激励频率和激励力下的力输出大于无力激励下的力输出，