On the influence of a dynamic vibration damper on the distribution of the amplitude of motion of the points of the vibration machine working member

The paper considers the issues of vibration isolation of railway bridge units on high-speed lines and seismic protection using dynamic vibration dampers. The purpose of the research is to justify the efficiency of damping the dynamic vibrations of the bridge supports with seismic insulating support parts. The research methodology involves building mathematical models of the systems under consideration and their numerical analysis. The methods of structural mechanics and dynamics of structures were used for solving the assigned tasks. The basic mathematical dependences of the vibration system with two seismic masses were developed. The rolling stock was represented by concentrated forces moving along the span structure. As a result, a new scheme for dynamic damping of vibration of the bridge supports was proposed according to which the span structure used as the dynamic vibration damper has an additional fastening on a rigid abutment.

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The active dynamic vibration damper in non-stationary operation of a vibroactive unit

Omsk Scientific Bulletin ◽

10.25206/1813-8225-2021-178-13-17 ◽

2021 ◽

pp. 13-17

Author(s):

D. V. Sitnikov ◽

◽

A. A. Burian ◽

Keyword(s):

Vibration Isolation ◽

Low Frequency ◽

Resonance Region ◽

Frequency Region ◽

Vibration Damper ◽

Passive System ◽

Isolation System ◽

Vibration Isolation System ◽

Dynamic Vibration ◽

Impulse Characteristics

The paper considers a vibration isolation system, in which a force is applied to the moving mass of the active dynamic vibration damper by an actuator in proportion to the measured value of the base response. The amplitude-frequency and impulse characteristics are plotted depending on the parameters of the system, assuming the actuator without distortion generates the force proportional to the base response. It is shown that the considered vibration isolation system is quite effective in the low-frequency region, including in the resonance region of the passive system, both in stationary and nonstationary modes of vibroactive forces

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Choice of configuration and parameters of the vibration protection system for gyroscopic angular velocity meters

Automation. Modern Techologies ◽

10.36652/0869-4931-2021-75-4-187-192 ◽

2021 ◽

Author(s):

Keyword(s):

Angular Velocity ◽

Protection System ◽

Technical Solution ◽

Vibration Damper ◽

Dynamic Vibration ◽

Shock Absorbers ◽

Damping Characteristics ◽

Vibration Protection ◽

High Elasticity ◽

Nonlinear Elastic

The rationale for the choice of a technical solution to the issue of vibration protection of gyroscopic angular velocity meters, built on the basis of dynamically tuned gyroscopes (DTG) is presented. The proposed vibration protection system consists of shock absorbers with high elasticity and dynamic vibration dampers (DVD) with nonlinear elastic and damping characteristics. The main factors that determine the peculiarities of choosing a vibration protection system for precision gyroscopic devices are indicated. Keywords dynamically tuned gyroscope (DTG); dynamic vibration damper (DVD); vibration protection system; gyroscopic angular velocity meter

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