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The dynamic behavior of PV-modules isanalyzed by different methods. Outdoor measurements of the deflection show their dynamic behavior under wind loads and the correlation between wind velocity and mechanical deflection. Indoor tests were performed with acoustic excitation of the modules with monitoring of the deflection. The frequency range of the resonance frequencies of different modules was between 10 and 100 Hz. Numerical calculations, based on FEM-modeling, yielded a very good agreement with the experimental results

The present contribution deals with the modeling and computational simulation of photovoltaic modules in the context of structural mechanics. Thereby, the focus is on the division of the boundary value problem of linear elastomechanics into two characteristic scales. The multiscale modeling starts at the global scale by means of an eXtended LayerWise Theory for a symmetric three-layered composite structure. A specially developed finite element is used to realise the discretisation. For the local structural analysis, a three dimensional unit cell is introduced which is representative in both plane directions and represents the structure of a photovoltaic module in transverse direction completely. The coupling of these two scales is carried out by the projection of the global deformations on the boundaries of the local structure, while the focus is on the transition from composite structure to three dimensional continuum. Thereby, characteristic coordinates for the location of a solar cell and an exemplary loading scenario are considered. Overall, a modeling and simulation approach is presented which permits a numerically efficient solution of structuremechanical problems on photovoltaic modules through a sequential procedure of a deductive multiscale approach.

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The present contribution is concerned with the computational homogenisation of mechanical properties of the heterogeneous photovoltaic module core layer. This is required since the mechanical approach with a novel layerwise theory used for efficient global structural analysis is based on homogeneous layers. This layerwise theory is build on the direct approach for plates, where all considerations are restricted to the deformable midsurface of the individual layer. Due to the geometric structure of the core layer, an anistropic material behavior of the effective substitute material results. The resulting orientation dependence of mechanical properties is specified and visualized. Finally, based on aforementioned work, the results of anisotropic elasticity gained for the three dimensional Cauchy continuum, are transferred to stiffness measures of surface elasticity.