This paper describes a structural optimization method for subsystems in statistical energy analysis (SEA). The objective function is power flow (PF), which shows the power flow between the subsystems. Under the constraint function that is the total mass, the design variable is taken as the thickness of each subsystem in the case of analytical SEA in commercial SEA software VA One. The proposed method is based on a combination of SEA and FEM calculation, calculating repeatedly until satisfying the value of objective functions under arbitrary constraints. A result of applying the proposed method to a simple structure consisting of two flat plates connected in an L-shaped configuration is given. The validity of the optimal thickness distribution by proposed method were verified by comparison of subsystem energy, input power, natural frequency and coupling loss factor before and after optimization.
Statistical Energy Analysis Shape Design Structural Analysis FEM Vibration of Continuous System Forced Vibration Statistical Energy Analysis Shape Design Structural Analysis FEM Vibration of Continuous System Forced Vibration