Uściślony opis drgań wymuszonych linii wałów z uwzględnieniem asymetrii sztywności na zginanie i podatności fundamentów

The paper deals with linear vibrations of shaftings at periodic excitations. The derived formulae are describing the influence of an internal damping, constant axial force, shear forces and rotary inertia on flexural Vibrations. There are also given the formulae concerning with longitudinal and torsional vibrations with an internal damping taken into account. The solution method for a flexural vibrations problem in flexible supported, geared shaft systems with flexural rigidity asymmetry is presented. The possibility of applying, the deformable (or stiff) finite element technique is illustrated for the case of a crankshaft. It is assumed that each node (or stiff finite element) has 6 degrees of freedom. The size of system matrices is reduced by means of transfer matrices related to solution coefficients for adjacent shaft pieces or by use of transfer matrices referred to one crank when the finite element technique is applied.