Model Of Vibration Isolation System Research Articles

Analysis of vibration isolation of a cargo mounted on polyurethane shock absorbers

The mathematical model of vibration isolation system of cargo, mounted in the container on tunnel-type polyurethane shock absorbers, is suggested. This type of shock absorbers allows working modes with finite deformations and has increased damping properties. The model considers nonlinearities of elastic and inelastic characteristics of shock absorbers and asymmetry of load curve. Coefficients of vibration isolation, which correspond to different container’s accelerations, are determined by harmonic and direct linearization methods of ODE of motion.

ANALYSIS OF CIVIL ENGINEERING STRUCTURES VIBROISOLATION EFFECTIVENESS

A properly designed and manufactured vibration isolation system of railroads and civil engineering structures has a decisive influence on the reduction of vibrations caused by crossing trains, trams and subway transferred to residential buildings This article presents an overview of current vibration isolation systems of railroads and civil engineering structures. Based on the effectiveness of the protection of residential and industrial buildings from vibrations the ranking of vibration isolation systems was proposed. The article also attempts to assess the effectiveness of vibration isolation systems currently used in rail trails. For this purpose, a discrete-continuous model of vibration isolation system of railway and tramway rails was build. For this model, dynamic analysis was carried out. Performed analysis allowed determining range of the natural frequency of vibration isolation system. The results of dynamic analysis allow pitching shift the natural frequency of the system under consideration from the frequency of excitation, which in turn is a fundamental condition for the proper operation of the vibration isolation. As part of work on a physical model of vibration isolation system there was also developed one-level crossings of roads and railroads. The work was carried out in a research project 4875/B/TO2/2010/38 financed by Ministry of Science and Higher Education.

Dynamic characteristics of the vibratory roller test-bed vibration isolation system: Simulation and experiment

The vibration test of the vibratory roller is of significant value before delivery and it is mainly done in outdoor test base at present. This method has low efficiency, poor security and reliability, so this paper proposes a new type of test-bed to regulate the commission test of the vibratory roller. This thesis regards the single-drum vibratory roller as a research object, and completes the overall structural design of the test-bed and theoretical analysis. The dynamic characteristics of vibration isolation system of the test-bed are studied by using theoretical analysis, experimental research and simulation analysis methods. According to the working principle of vibration isolation system of the test-bed, the dynamics model of vibration isolation system is established by using two-stage and inclined vibration isolation technology. The vibration isolation system is studied by using rigid-flexible coupling simulation method. Finally, based on the experimental optimization results of vibration isolation system, the test-bed is developed and its function is verified.