抄録
This paper presents the optimization for nonlinear vibration of laminated,composite, circular cylindrical shells. For this purpose, a backbone curve equation for primary resonance of the shell is derived from nonlinear vibration analysis using the harmonic balance method analytically. In optimization, fiber angles for each lamina of a balanced laminated shell are taken as discrete design variables, and then an objective function defined by nonlinear natural frequency, linear natural frequency and a weighting coefficient is maximized. In numerical calculations a simple genetic algorithm is employed for the present problem and optimal design solutions are obtained by specifying the weighting coefficient. Finally optimal stacking sequence of the shell is studied by considering both of the linear vibration and nonlinear vibration characteristics of the shell.
