飛行機の衝突に伴う骨組鋼構造の崩壊解析

抄録

In this study, the formerly developed Adaptively Shifted Integration (ASI) technique for the linear Timoshenko beam element is modified into the ASI-Gauss technique by placing the numerical integration points of the two consecutive elements forming an elastically deformed member in such a way that stresses and strains are evaluated at the Gaussian integration points of the two-element member. On comparison with the ASI technique, the ASI-Gauss technique proves its higher accuracy and efficiency in elastic range. Instead of applying impact loads in the form of nodal forces, this study simulates the impact phenomenon by means of contacts between the elements involved and the elemental contact algorithm is verified from the point of conservation of energy. A structural collapse analysis of a steel framed structure due to collision with a small aircraft is performed by considering member fracture. From the results obtained, we can observe propagation phenomena of impact loads and shock waves. Moreover, a considerable difference of the impact damage on the structure is observed when the cruise speed of the aircraft is changed.