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Optimization technology for reducing cost and improving quality of product design is developing rapidly. However, it is important to prove the validity, effectiveness and efficiency of the optimization algorithm that solves the problems. In this report, an optimization system for solving structural problems was built by combining the optimization software and the structural analysis software. A structural model which has a theoretically unique optimum solution was used to evaluate the optimization system. This system will be successful for solving the model problem when the proper optimization algorithm and conditions were selected. Next, the optimization system was applied to more realistic structural problem to lighten the boom of the hydraulic excavator. Reasonable solutions including more than the expectation were obtained. The verified optimization system will give us useful information and ideas on designing products under careful technical considerations.
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