太陽光電模組與夾扣件受機械荷重之有限元素分析

The solar photovoltaic modules need to be installed outdoors. However, the long term and strong wind loads might loosen the screws between the solar photovoltaic modules, the clamps and the frames, or even completely separated. The model of the solar photovoltaic modules in this research is established with the software ABAQUS, which is based on the finite element method. According to the standard IEC 61215, a uniform wind pressure of 2, 400 Pa is applied to the solar panels to determine the maximum stress and the magnitude and position of the deformation. This research analyzes the crystalline-silicon solar photovoltaic module (2-roots and roof-top). Results show that enough tightening force can reduce the deformation and stress; however, the frames, clamps, and fasteners might be damaged due to the excess tightening force under a great wind load. The result of applying periodic wind load is similar to the static wind load analysis. In addition, the negative wind load causes larger deformation than the positive one; therefore this condition needs a larger tightening force to make the solar system be stable enough to converge. It means that negative wind load have significant impact on the solar system.