@ARTICLE{Dumitriu_Mădălina_A_2016, author={Dumitriu, Mădălina}, volume={vol. 63}, number={No 1}, journal={Archive of Mechanical Engineering}, pages={25-44}, howpublished={online}, year={2016}, publisher={Polish Academy of Sciences, Committee on Machine Building}, abstract={The paper focuses on a nonlinear model to represent the mechanical behaviour of a mix coil spring – rubber used in the secondary suspension of passenger rail vehicles. The principle of the model relies on overlapping of the forces corresponding to three components – the elastic component, the viscous component and the dry friction component. The model has two sources on non-linearity, in the elastic force and the friction force, respectively. The main attributes of the model are made visible by its response to an imposed displacement-type harmonic excitation. The results thus obtained from the applications of numerical simulation show a series of basic properties of the model, namely the dependence on amplitude and the excitation frequency of the model response, as well as of its stiffness and damping.}, type={Artykuły / Articles}, title={A nonlinear model of mix coil spring – rubber for vertical suspension of railway vehicle}, URL={http://www.czasopisma.pan.pl/Content/85084/PDF/ame-2016-0002.pdf}, doi={10.1515/meceng-2016-0002}, keywords={coil spring-rubber, suspension, railway vehicle, stiffness, damping}, }