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The stacker crane is a long-and-thin structure with a large length-to-width ratio. It is difficult to obtain a topology configuration with good period properties using traditional optimization methods. While the mathematical model of periodic topology optimization-in which the elements' relative densities are selected as design variables, and mean compliance as the objective function-is established. To find a topology configuration with a good period property, an additional constraint conditiondoi:10.1109/access.2019.2960327 fatcat:e7de7xncunghjdyousshjlliku