PREDICTION OF THE APPEARANCE OF ROLLING ZONES OF FLEXIBLE STRUCTURES ON THE BASIS OF THE ANALYSIS OF THE STRESS-STRAIN STATE

Nikiforov Mikhail Mikhailovich, Bautov Andrey Nikolaevich

The trends in the development of astronautics are such that the spacecraft of the future will require a much larger amount of energy and, accordingly, the efficiency of energy systems should become an order of magnitude higher. Solar panels based on traditional frame structures have a significant drawback - low specific power (the ratio of the generated power to the total mass of the solar battery structure), therefore, with an increase in energy consumption, the mass of the structure rapidly increases, which has a tangible limit. In this regard, the creation of an alternative design of solar panels is required. One of these is solar panels based on frameless thin-film structures formed by centrifugal forces. The design of these structures has a number of features and special limitations that must be taken into account at each design stage. Particular attention is drawn to the formation of wrinkle zones on the flexible surface during the operation of the structure. This effect must be minimized at the structural level, since the appearance of folding zones negatively affects the state of photoelectric converters and switching circuits. A technique for predicting the appearance of wrinkle formation zones is described using the example of a designed flexible solar battery. The analysis of the stress-strain state of the structure was carried out and, based on its results, a design solution was adopted that minimizes negative factors.

Keywords:Stress-strain analysis, flexible solar panels, frameless structures