The use of nonlinear dynamic analysis in the calculation of cargo fall onto the hatch of the gondola carAndrew Nikitchenko, Viktor Artiukh, Denis Shevchenko, Andrey Misailov and Dmitry MakhovE3S Web Conf., 110 (2019) 01050DOI: https://doi.org/10.1051/e3sconf/201911001050