A theoretical solving system is developed to analyze the forces characteristics of the mooring system of HDPE circular net cage based on linear wave theory and the Morison method. The hydrodynamics factors of wave and current are both taken into account in the model and an engineering case in Zhanjiang bay is applied to testing its feasibility and efficiency. Results show that the theoretical calculating results can agree well with the in-situ measurement results, and the theoretical model can be applied to actual engineering conveniently and efficiently for designing the mooring system of circular net cages. Moreover, according to the theoretical analyzing results, current force is suggested to be the main source of the mooring lines forces inside the bay. And with the increase of the wave height outside the bay, the wave force raises and becomes more and more important. When the wave height is greater then 2m, wave force is suggested to be the main source of the mooring lines forces.%基于线性波理论及Morison方法,推导建立了波一流共同作用下圆形深水网箱锚绳受力求解的理论模型.以湛江湾特呈岛深水网箱养殖基地为背景,分析了典型圆形重力网箱在特征波浪、海流作用下的浮架、网衣及锚绳的受力特性,并与现场实测的数据进行了比较.结果显示,理论计算结果能较好地与实测数据吻合.在本算例中,当网箱处于湾内时,海流是其主要的外部动力因素,随着网箱向湾外的发展,波浪力对锚绳力的贡献将显著增加；当波高超过2m时,波浪力将成为主要的外部动力因素.该理论求解体系能方便有效地应用于工程中,为深水抗风浪网箱的受力分析及锚泊系统设计等问题提供积极的理论参考及初步的定量估计.
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