Monograph . Ulyanovsk: UlSTU, 2011. 208 s. The monograph deals with the problem of longitudinal impact in rod systems of heterogeneous structure. The models of longitudinal impact under the assumption of the identity of deformation of the rod under static and dynamic loads. are considered. Wave models of longitudinal impact are discussed: model of Saint-Venan, model of longitudinal impact on the rod with heterogeneous sections, model of longitudinal impact on the rod with variable longitudinal stiffness. In modeling, the rod is represented by a set of conjugate elements, within which the movement of cross-sections is described by the wave equation, and the Dalumber method is used to solve it .. The dynamic processes during longitudinal impact, the formation and propagation of deformation waves, the transformation of waves at the boundaries of the core system. are considered. The book will be useful to specialists working in the field of creating impact machines, the use of shock technologies in engineering, the construction industry, instrumentation, mining industry.