新型漂浮式光伏结构的冰载特性分析与防冰设计

Abstract Existing design criteria for the floating photovoltaic (FPV) structures mainly emphasizes wind and wave environmental conditions without sufficiently taking the ice load impact into account. However, in the cold sea area, the dominant load on the FPV structure is considered to be the ice loads. This paper aims at evaluating the dynamic anti-icing performance of the novel FPV structure under ice loads. A novel FPV system with three-point mooring is proposed in this study, and the stability and mooring strength of the novel FPV system is discussed through the numerical simulation and model tests. An anisotropic ice numerical model is developed to simulate the coupled interaction between ice and the FPV structure based on finite element method-cohesive element method (FEM-CEM), and the accuracy of the ice-FPV structure coupled interaction model is verified based on a series of dynamic ice force model tests. Based on the established coupled interaction model, the dynamic ice force variation law of the proposed novel FPV are investigated under different ice velocities and thicknesses, and dynamic behaviors for mooring lines tension forces are quantitatively studied under sea ice in time domain. Meanwhile, structural damage analysis is carried out by comparing stress and strain. It is found that the component connection position on front sides of the FPV structure are areas where the damage occurs first; Afterwards, cracks are generated in connection positions on the rear side, resulting in complete fracture failure. In addition, different mooring tension states are considered to analyze the effects of ice force and mooring tension. Research results show that the slack-anchoring mooring state can be used as an anti-icing method for the novel FPV structure.