Efficient Model of the Interaction of Elastomeric Filler with an Open Shell and a Chrome-Plated Shaft in a Dry Friction Damper

Abstract

The results of a study of the contact interaction of an open shell and a chrome-plated shaft with elastomeric filler installed coaxially are presented. The considered contact system is a model of the original design of the shell damper of dry friction. The design feature is the following: the bearing link of the damper is a thin-walled cylindrical shell with a cut along the generatrix; the working body of the damper is elastomeric filler; a hollow chrome-plated shaft centers the damper elements and allows it to be used in technological processes with the presence of aggressive and abrasive-containing media. The mechanical-mathematical modeling of the behavior of the presented damper under the conditions of operational loads has been carried out. The idea of identifying the properties of a cut isotropic shell, which bends under the conditions of a nonaxisymmetric contact load, and a strongly orthotropic continuous shell is applied. As a result, dependences were obtained to determine the rigidity and the maximum allowable load of the damper. The effect of the coefficient of friction of the contact pairs elastomer-shell and elastomer-shaft on the damper performance properties has been studied. A technique for the quasi-static analysis of structural damping in non-mobile, non-conservative shell systems with deforming filler has been developed. The hysteresis loops of the damper under a nonmonotonic load are constructed, the dependence of the amount of dissipated energy on the cycle asymmetry coefficient is found. An analysis of the results obtained showed that the use of open shells in friction shock absorbers can significantly reduce their rigidity compared to solid shells and thereby reduce the resonant frequencies of the dynamic system. This circumstance makes such vibration isolators particularly attractive for use in superresonance vibrators as working modules of drilling shock absorbers and elastic hangers of sucker rods in oil and gas production.

Analytical Model of Structural Damping in Friction Module of Shell Shock Absorber Connected to Spring

“…In contrast to previous works [41,42,83], in which the phenomenon of structural hysteresis in shell dampers is described in terms of the power cycle (Q min , Q max ), the equations ( 33)-( 35) obtained here present the nonconservative properties of the damper in terms of the kinematic cycle (δ min , δ max ). Tis approach actually made it possible to study energy dissipation in the parallel connection of the nonlinear and the linear element.…”

Investigation of the defect structure of high-resistance CdTe single crystals by the methods of high-resolution x-ray diffractometry and total integral reflective power

“…Mono crystal growing technology improvement also creates prospects for the production of highly sensitive strain gauges for monitoring the mechanical stresses and deformations in thin-walled structures 1 , in particular in flexible shells and flexible plates 2 . Cadmium telluride and compounds based on it are suitable for practical use in detectors for non-destructive inspection of bodies with cracks and internal micro defects 3 in optical sensors and filters 4 , in equipment for high-precision diagnostic and interventional radiology 5 , etc.…”

The Inertial Disturbances of Fluid Movement in the Chamber of a Liquid Autobalancer

“…In papers [44,45], a quasi-static approach to the problems of dynamic deformation of shells partially filled with an elastic filler was implemented, and in articles [46,47], modal analysis and parametric optimization of such systems were carried out.…”