Fomin Oleksij, Gorbunov Mykola, Lovska Alyona, Gerlici Juraj, Kravchenko Kateryna
Department of Cars and Carriage Facilities, State University of Infrastructure and Technologies, Kyrylivska Str., 9, 04071 Kyiv, Ukraine.
Department of Railway, Automobile Transport and Handling Machines, Institute of Transport and Logistics, Volodymyr Dahl East Ukrainian National University, Central Avenue 59a, 93400 Sewerodonetsk, Ukraine.
Materials (Basel). 2021 Apr 12;14(8):1915. doi: 10.3390/ma14081915.
The study deals with an application of aluminum foam as an energy-absorbing material for the carrying structure of a rail car. The material is particularly recommended for circular tube carrying structures. The authors conducted mathematical modeling of dynamic loads on the carrying structure of an open wagon that faces shunting impacts with consideration of the center sill filled with aluminum foam. It was established that the maximum accelerations on the carrying structure of an open wagon were 35.7 m/s, which was 3.5% lower in comparison with those for a circular tube structure without a filler. The results obtained were proved by computer modeling. The strength of the carrying structure of an open wagon was also calculated. It was established that aluminum foam applied as a filler for the center sill decreased the maximum equivalent stresses in the carrying structure of an open wagon by about 5% and displacements by 12% in comparison with those involving the circular tube carrying structure of an open wagon without a filler. The natural frequencies and the oscillation modes of the carrying structure of an open wagon were defined. The designed models of the dynamic loading of the carrying structure of an open wagon were verified with an F-test.
该研究涉及泡沫铝作为铁路车辆承载结构吸能材料的应用。这种材料特别适用于圆管承载结构。作者对敞篷货车承载结构在考虑填充泡沫铝的中梁情况下面临调车冲击时的动态载荷进行了数学建模。结果表明，敞篷货车承载结构上的最大加速度为35.7米/秒，与没有填充物的圆管结构相比降低了3.5%。通过计算机建模验证了所得结果。还计算了敞篷货车承载结构的强度。结果表明，与没有填充物的敞篷货车圆管承载结构相比，用作中梁填充物的泡沫铝使敞篷货车承载结构中的最大等效应力降低了约5%，位移降低了12%。确定了敞篷货车承载结构的固有频率和振动模式。通过F检验验证了所设计的敞篷货车承载结构动态载荷模型。
