Lazy wave risers can mitigate the kinematic coupling between floating structure and riser touchdown zone (TDZ), so as to improve its fatigue life. However, due to the introduction of buoyancy blocks, nonlinear dynamic response and fatigue damage prediction will be more complicated. In this paper, a concept of “multiple lazy wave riser”, namely, deepwater lazy wave riser configuration based on multiple waveform serial arrangement, is proposed. According to the improved slender rod theory and equivalent optimization of buoyancy sections, three riser configurations with different heave excitations and currents are structured. The dynamic response characteristics, excitation motion transfer paths and fatigue damage hotspots are well compared. Moreover, the influence law of riser fatigue damage and decoupling mechanism of riser TDZ movements are also explored. The results indicate that: by constructing lazy wave configuration, deepwater risers based on lazy wave configuration can attenuate the kinematic coupled response of floating structure in the first sag bend section, and reduce the normal motion response in the riser TDZ, so as to optimize its anti-fatigue performance; compared with lazy wave riser, multiple lazy wave riser has some competitiveness in the anti-fatigue performance for the riser TDZ. For flexible risers, this competitiveness will become even more prominent.

惰性波上升器可以减轻浮动结构与上升器触地带（TDZ）之间的运动学耦合，从而提高其疲劳寿命。然而，由于浮力块的引入，非线性动力响应和疲劳损伤预测将更加复杂。本文提出了一种“多重懒人立管”的概念，即基于多重波形串行排列的深水懒人立管配置。根据改进的细长杆理论和浮力截面的等效优化，构造了具有不同升沉激励和水流的三种立管构型。很好地比较了动态响应特性，激励运动传递路径和疲劳损伤热点。而且，探讨了冒口疲劳损伤的影响规律以及冒口TDZ运动的解耦机理。结果表明：通过构造懒散波构造，基于懒散波构造的深水立管可以减弱第一垂弯段浮体结构的运动学耦合响应，并减小立管TDZ的法向运动响应，从而对其进行优化。抗疲劳性能；与懒散立管相比，多重懒散立管在TDZ立管的抗疲劳性能方面具有一定的竞争力。对于灵活的冒口，这种竞争力将变得更加突出。降低立管TDZ的正常运动响应，以优化其抗疲劳性能；与懒散立管相比，多重懒散立管在TDZ立管的抗疲劳性能方面具有一定的竞争力。对于灵活的冒口，这种竞争力将变得更加突出。降低立管TDZ的正常运动响应，以优化其抗疲劳性能；与懒散立管相比，多重懒散立管在TDZ立管的抗疲劳性能方面具有一定的竞争力。对于灵活的冒口，这种竞争力将变得更加突出。