Topology Optimization and Modal Analysis of Nanosatellite Structure

Abstract

Design of a nanosatellite structure to accommodate various subsystems components in the preferred position and orientation and also provide ease of an access is of paramount interest. The provision for payloads, attaining desired field of view of camera, experiencing minimal vibration due to static, dynamic and impact loads, modular design for internal placement of components as per the requirement, efficient electrical connectivity and load paths, incorporating the concept of bus structure with lowest mass and expandability of structure are the critical requirements for designing satellite structure. Considering these aspects three a structure with vertical partitioning is considered to be an effective choice for easier accessibility of subsystem components, assembling and disassembling of individual components. The mass properties and centre of gravity of the designed structure are verified with theoretical as well as solid modelling. Finite element analysis (FEA) is performed to examine the strength characteristics of the designed structure. Topology optimization studies are conducted to reduce the weight and optimized model is undergone static analysis to withstand the loading conditions. Natural frequency of the structure is determined through modal analysis for the optimized model.