ANALYSIS OF NONLINEAR RIGIDITY CHARACTERISTICS OF AIR BLOWER COMPRESSOR ELASTIC SUPPORTS

Vibrations of rotor systems are largely determined by elastic characteristics supports. In the general case, dependence displacements on force for such supports is nonlinear. This applies to bearing various types. addition bearings, elements also used in systems. They designed change overall stiffness The paper analyzes radial flexible ring dampers For this, two main approaches proposed. first a conventional simulation this problem contact mechanics using finite element method. second an analytical method that can be as alternative expensive numerical calculations. based principle minimum additional energy. A special closed-form variational formulation developed Euler-Bernoulli beam approximation and simplified model normal flanges. It was shown surface tolerances parts have significant effect response ring, which become Tight fit both sides makes it much stiffer, non-tight leads free movement weaker damping its movement. Both methods gave results consistent considered cases. By varying their design parameters, possible adjust from critical modes operation. Keywords: system, support, rigidity, analysis, stress-strain state, interaction, energy