Szukana fraza: [Abstract = "The paper deals with modelling and calculations of asymmetrical multi\-bolted joints at the assembly stage. The physical model of the joint is based on a system composed of four subsystems, which are\: a couple of joined elements, a contact layer between the elements, and a set of bolts. The contact layer is assumed as the Winkler model, which can be treated as a nonlinear or linear model."]