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中文摘要：
J型铺管法是深海管线铺设安装最先进的方法之一,研究铺设过程中管线受浮体运动和海洋环境载荷的动力响应影响,有助于认识和提高J型铺管法管线铺设的安全性。通过管线的静态整体构型分析得出其力学关键位置,并对其做时域动力响应计算,着重探讨了不同波浪情况、浮体垂荡和纵荡运动幅值,以及顶部张力参数对管线应力水平动力响应的影响。研究表明：触地区域是深海J型铺管法管线的应力响应最大位置;波浪水动力载荷对管线的直接影响作用较小;铺管船等浮体的垂荡运动对管线触地区域的力学影响显著,纵荡运动的影响略低于垂荡运动;管线顶部施加的张力越大,触地区域动力响应减小,但减小有限。
英文摘要：
The J-lay method is one of the most advanced techniques for deep sea pipeline installation. Dynamic response analysis of the pipeline during installation process under motions of floating vessels and forces of the marine environment can help understand and improve the safety of J-lay installation. Through static configuration analysis, the most important mechanical position of the pipeline is obtained, then time domain dynamic response analysis is conducted, focusing on the impacts on the pipeline＇s equivalent stress with different wave conditions, heave and surge motions of the vessel and the pipeline＇s top tension parameters. The research results show that the largest equivalent stress of the pipeline during deep sea J-lay installation appears at the touch down zone. The direct effect of wave hydrodynamic forces on the pipeline is quite small. However, the heave motion of the vessel can bring about great impact on the touch clown zone dynamics, a bit larger than the impact of the surge motion. The dynamic response of the touch down zone decreases with increasing tension imposed on the top of the pipeline, but the range of decrease is limited.
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