航空機用構造材料の雷撃による動的荷重の同定

抄録

In this study, distribution of impulse load caused by shockwave associated with lightning strike was analytically estimated to clarify the effects of mechanical load on lightning strike damage of CFRP laminates. Finite element analyses (FEA) were conducted to simulate displacement response on rear surface of specimen Pressure distribution was parametrically examined to simulate the dynamic load distribution caused by lightning strike by compared with the experimentally measured specimen deflection which was obtained by simulated lightning current test. As results, by applying estimated impulse load distribution, maximum displacement response obtained by FEA at the center of specimen roughly agreed with the experimental result. However, displacement history at center of specimen and deformation shape showed significant difference between experimental and numerical analysis result. For a precise estimation of pressure distribution caused by lightning strike, more detailed parameter fitting is required