SPATIAL COMPELLED VIBRATIONS OF PIPELINE UNDER INTERNAL PRESSU

Investigation is focused on spatial nonlinear compelled vibrations of a double support pipeline affected by variable internal pressure. The dependencies have been obtained between the amplitude of pipe torsional and flexural vibrations and the values of static and dynamic components, circular frequency and initial internal pressure.
It was shown that in the presence of resistance forces the amplitudes of pipe angular and flexural motions are essentially lower as compared to what takes place in the absence of these forces.
It was found that a relatively small increase in the pressure static component can cause a considerable increase in the amplitudes of both angular and flexural motions.

a pipe line on two supports, forced vibration, torsional and flexural vibrations, variable internal pressure, Bubnov - Galerkin procedure, the pressure static component