Frequency Optimization Design Of Solar Panels

The solar cell array is a flexible structure to provide energy for the spacecraft which is running in space. With the continuous development of the satellite technology, the structure form of the solar cell array is constantly changing. Nowadays folding structure of the solar panels is the most widely used solar array structure. In general, the design requirements of solar panels are as follows: the whole configuration requirements of the solar panels, quality requirements of the solar panels, also the stiffness and strength requirements of the solar panels, etc. In general, the rigidity requirement is the natural frequency of the solar panels, in order to make sure that the spacecraft which is running in space avoid the dynamic coupling phenomenon that will damage to the spacecraft. So the optimization design of frequency of solar panels has important significance.At present, the optimization design of frequency of structures mainly has the following two aspects: optimization design which is based on frequency constraint and takes the quality as the objective function; optimization design which is based on mass or volume constraint and takes the natural frequency of structure as the target. Frequency optimization design of 3D continuum structures is a hot debate issue. This paper carry out optimization of unilateral clamped solar panels based on the optimization of band-gap brought up by Niels Olhoff in 2012.Following works were accomplished:1、Considering the integrity requirements of satellite, the optimization model of solar panels was obtained based on optimization method of band-gap brought up by Niles Olhoff, during which, 2/3 of the original volume of solar panels was used as constraints with the goal of maximized higher order eigenfrequency gaps between 4th and 5th.2、Basis of the main shapes of solar panels and according to the optimization model to determine the shape and number of the substrates which to make up the solar panels, as well as the rigidity of the hinge connection between substrates. After that this paper established the simplified model of the solar panels, and had carried on the modal analysis to it to ensure that it meets the design requirements or not;3、Then this paper established some simplified models to gain a series of conclusion that presence or absence of strengthening box, the position and number of the hinges between substrates, tensile and bending stiffness of the hinges, the thickness of honeycomb core and the plate which is on the constraint end, the thickness of honeycomb core and the plate which is on the free end, presence or absence of connection, the stiffness of the connection, the topological shape of the connection, the longitudinal length of the connection et. all these situations influence on the natural frequency of solar panels, and these conclusions can provide a certain reference significance to the frequency optimization design of the solar panels.