Dynamic vibration reduction experimental device and experimental method

Abstract

The invention relates to the technical field of mechanics experiments and particularly relates to a dynamic vibration reduction experiment device and method. The device comprises a fixed pedestal, a vibration main system, a vibration subsystem, and a vibration test system, wherein the vibration main system comprises an elastic beam and a rotating motor mass block; two ends of the elastic beam are hinged to the first supporting plate and the second supporting plate respectively; the rotating motor mass block is arranged on the elastic beam; the vibration subsystem comprises a spring, a porous aluminum sheet and an electromagnetic pole; an upper end of the spring is fixedly connected to the rotating motor mass block, a lower end of the spring is fixedly connected to a porous aluminum thin plate, and the electromagnetic pole is arranged on a support; and the vibration testing system is connected with the rotating motor mass block and the porous aluminum thin plate. The method comprises the following steps of measuring different mass ratios and different rigidity ratios of the vibration main system and the vibration subsystem and dynamic vibration reduction effects of the vibration subsystem under different damping conditions; and measuring the influence of different arrangement positions of the vibration subsystems on the dynamic vibration reduction of the vibration main system.

Description

technical field [0001] The invention relates to the technical field of mechanical experiments, in particular to a dynamic vibration reduction experimental device and an experimental method. Background technique [0002] Dynamic vibration reduction is a dynamic concept. If the vibration system that needs vibration reduction is regarded as the main system, and a subsystem composed of a certain mass, stiffness, and damping is added, when the main system vibrates, the vibration energy consumption of the subsystem reduces the vibration response of the main system. , this method is called dynamic vibration reduction. The dynamic vibration reduction experiment is an important mechanical experiment. The existing dynamic vibration reduction experiments are mainly simple demonstration experiments. The main system and subsystem used in the experiment are vibration devices with fixed parameters. Students can only observe the experimental phenomena and cannot pass The experiment further...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a dynamic vibration reduction experimental device and experimental method to solve the defects of insufficient experimental content, single demonstration function and lack of experimental analysis links in the existing dynamic vibration reduction experimental technology. The optional vibration main system, the vibration subsystem with variable stiffness, mass and damping, can not only realize the original demonstration experiment function, but also relatively complete analysis of the main system, subsystem mass ratio, stiffness ratio, subsystem damping ratio and Influence law of subsystem layout position on dynamic vibration reduction

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