TY - JOUR N2 - 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. L1 - http://journals.pan.pl/Content/85084/PDF/ame-2016-0002.pdf L2 - http://journals.pan.pl/Content/85084 PY - 2016 IS - No 1 EP - 44 DO - 10.1515/meceng-2016-0002 KW - coil spring-rubber KW - suspension KW - railway vehicle KW - stiffness KW - damping A1 - Dumitriu, Mădălina PB - Polish Academy of Sciences, Committee on Machine Building VL - vol. 63 DA - 2016.04.20 T1 - A nonlinear model of mix coil spring – rubber for vertical suspension of railway vehicle SP - 25 UR - http://journals.pan.pl/dlibra/publication/edition/85084 T2 - Archive of Mechanical Engineering ER -