振動制御のためのバイメタル複合構造体における形状最適設計

抄録

Bimetal composi te structures have potential applications as parts or components in automobile, aircraft, marine engineering to satisfy specific requirements because of the combination of different material properties of metals. In the present work, to control the vibration behavior of bimetal composite structures, we propose a free-form optimization method based on the H¹ gradient method to optimize the interface shapes of initial stressed composite structures composed of dissimilar materials. External forces are acted on the structures to generate the initial stresses, and the bandgap between different order of eigenvalues using weighting coefficients are set as the objective function, which is maximized under the volume constraint. From the design example, the developed shape optimization method has efficiency and validity to design bimetal composite structures with large bandgap for vibration control.