Modal analysis of ground-mounted photovoltaic structure under a snow load

Abstract

This paper is devoted to some issues of the finite element analysis (FEA) of ground-mounted photovoltaic (PV) structure, focusing on the entire structure where the panels under a snow load considering regional climatic data. The eigenvalue extraction used to calculate eigenfrequencies and mode shapes is based on the Lanczos iteration method. The frame and purlins were modeled as a 3D wire frame and meshed with the linear beam elements with specify C and U cross-section shapes. Composite shell elements were used to simulate the PV panel. The purpose of finite element analysis is to provide a starting point for studies of the forced vibrations with the results of modal analysis. These are also important results for analyzing the effects of vibrations of structure on the bolts securing the panels.