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Recently the Genetic Algorithms (GAs) have elements. Within this framework, the interest of the results become a popular optimization tool for many areas of depends on quality and of the adequacy of the physical model research and topology optimization an effective design tool on which calculations are based, various tools for numerical for obtaining efficient and lighter structures. In this paper, simulation today proved reliable and their employment a versatile, robust and enhanced genetic algorithm (GA) is became essential in many cases such as Solid Edge, Msc proposed for structural topology optimization. This Patran/Nastran. method makes it possible to obtain global minimum and toThe satellite design process is complex and difficult due to the avoid remaining trapped in a local minimum.physical and operating constraints, uncertain environments, We examine all of the technologies and their benefits for and extreme operating conditions. One must also consider that satellite structural designs, which lead to achieving better launch costs may be considerable relative to the actual cost to design by using computer-aided techniques. manufacture the satellite. To reduce launch costs, mass and Numerical results show that the GA is an efficient and volume of the satellite must be minimized. Therefore, robust in solving the structural topology optimization satellites must be efficiently configured to conserve mass and problems of minimum compliance design, minimum volume and to exploit the resources from the environment weight design and optimal compliant mechanisms design.[1, 2, and 3]. In this paper the optimisation was performed on small An important problem facing design engineers in aerospace satellite. The designed geometry was modelled next and industry is how to achieve better design concepts by then subjected to finite element analysis (FEA) using considering structure performance and manufacturing cost in different types of mesh under launch loads environment in the early stages of product development. The small satellite order to obtain its natural frequency and to determine the designs must satisfy the drive for low-mass, low-cost systems, maximum stresses acting on the elements of the structure. and be robust to uncertainty since design validation will be In the case of the dynamic analysis, it is about the based on analysis instead of pre-launch tests. Analytical visualization of the different 4 first modes of vibration techniques will be required to identify which technologies or obtained with a loading which corresponds to the launch structural architectures are most appropriate to meet environment (1OOG in each axis). The different results conflicting system requirements, but traditionally, modelshow that it is perfectly possible to build the isogrid and based dynamic analysis would only take place after a single honeycomb structures for the small satellites in order to point design is chosen. This is particularly true in the reduce the total mass and to gain in term of cost.aerospace and automotive i...

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