With the continuous growing of the aquaculture industry and increasingly limited fish farming sites at close to shore areas both in Norway and worldwide, there is a need to develop fish farms suitable for aquaculture production in typical offshore environments. For this purpose, SALMAR has developed and deployed the Ocean Farm 1 facility for offshore fish farming.

The main purpose of this paper is to develop a reliable numerical model and investigate the motion responses of the Ocean Farm 1 structure in waves and current. The established numerical model consists of the Ocean Farm 1's frame structure (with rigidly-connected circular column components), the net and the mooring system. The hydrodynamic external loads and coefficients of the frame structure are obtained by using potential flow theory. The quadratic drag load on the individual circular columns of the frame structure is formulated by a given drag coefficient. The loads on the net are formulated by using the screen model, where the Reynold number dependent lift and drag forces are formulated as a function of the solidity ratio Sn of the net, relative inflow angle and velocity. The hydrodynamic loads on the mooring lines are formulated using the Morison's equation and the structural responses of the mooring lines are obtained using a nonlinear FE model.

With the developed numerical model, time domain simulations are performed. The simulation results are firstly validated against measured data from the decay tests, current tests, and regular wave tests. After the validation, numerical simulations are performed in different irregular wave and current combined weather conditions and the obtained motion response of Ocean Farm 1 are discussed and compared with available measurement data.

随着水产养殖业的不断发展以及挪威和世界范围内靠近海岸地区的鱼类养殖场越来越有限，有必要发展一种适合在典型的近海环境中进行水产养殖生产的养鱼场。为此，SALMAR开发并部署了海洋农场1设施用于近海鱼类养殖。

本文的主要目的是建立一个可靠的数值模型，并研究海洋农场1结构在波浪和水流中的运动响应。建立的数值模型由Ocean Farm 1的框架结构（具有刚性连接的圆柱部件），网和系泊系统组成。利用势流理论求得了框架结构的水动力外载荷和系数。框架结构的各个圆形柱上的二次阻力载荷由给定的阻力系数表示。通过使用筛网模型来计算网上的载荷，其中取决于雷诺数的升力和拖曳力被表示为网的固体比Sn，相对流入角和速度的函数。

利用开发的数值模型，可以进行时域仿真。首先根据衰减测试，电流测试和常规波测试的测量数据对仿真结果进行验证。验证之后，在不同的不规则波和当前的组合天气条件下进行数值模拟，并对获得的海洋农场1的运动响应进行讨论，并与可用的测量数据进行比较。