Structural and dynamic analysis of a flexible solar array based on shape memory polymer composites

In recent years, shape memory polymer composites (SMPCs) have been gradually applied to space deployable structures owing to their shape memory characteristics and superior mechanical properties. This study investigated structural and dynamic analysis of an SMPC flexible solar array system (SMPC-FSAS). The SMPC-FSAS was designed to ensure the safety and reliability of the structure. In addition, the modal and swept sine vibration responses of the structure were studied by numerical simulations and experiments. The experimental results were consistent with the numerical simulation predictions, which verified the correctness of the numerical model. Subsequently, a series of dynamic tests verified that SMPC-FSAS has a favorable structural strength and rigidity. Notably, the SMPC-FSAS carried on the SJ-20 geostationary satellite was successfully launched into a geosynchronous orbit, which further verified its safety and reliability. The results of this study are expected to serve the design of ultra-large flexible solar arrays in the future.