Abstract
Topology optimization has been successful in many industries, including the machine industry. However, two problems appear when topology optimization is applied to unsteady oscillation problems. First, a great deal of computational memory is required, because the adjoint equation for topology optimization must be solved. Second, numerous high-density elements are distributed at the load point of the cantilever beam model. In this study, the first problem is solved by changing the performance function and applying it to the maximization or minimization proble. We attempted to solve the second problem by applying the result from the steady problem to the initial conditions of the unsteady oscillation problem. In this paper we describe the optimal shapes, show the displacement waveform at a point and the stress distribution at a time, and discuss the usefulness of the research results.
