Vibration reduction and isolation model test device for railway vibration source

Abstract

The invention provides a vibration reduction and isolation model test device for a railway vibration source. The vibration reduction and isolation model test device comprises a test box, an in-box soil body, a vibration isolation barrier, a data acquisition device and a load applying device; the vibration isolation barrier is arranged inside the soil body and on the surface of the soil body and isused for evaluating a vibration isolation effect; the data acquisition device is arranged in the soil body and on the surface of the soil body and is used for acquiring vibration signals and transmitting acquired data to the load applying device; and the load applying device comprises a simulation vibration device and a control device, wherein the simulation vibration device is arranged above thesoil body and is used for simulating moving load, and the control device is arranged outside the box body and is used for controlling the simulation vibration device to act and displaying and storingthe acquired data. According to the vibration reduction and isolation model test device of the invention, closed-loop PID control is adopted, so that the output of an excitation force can be accurately controlled; an electromagnetic-type vibration exciter is used as an excitation device, so that vibration excitation signals with a relatively wide frequency range can be provided; and a wireless vibration sensor is adopted, so that the influence of a line on a test can be avoided when the internal vibration of the soil body is measured.

Description

technical field [0001] The invention belongs to the field of geotechnical model test devices, in particular to a vibration reduction and isolation model test device for railway vibration sources. Background technique [0002] my country is in a period of rapid development of rail transit, especially the construction of China's rail transit represented by high-speed railways is in full swing. However, with the construction and operation of rail transit infrastructure, the problem of environmental vibration caused by train operation has become increasingly prominent. [0003] From the professional point of view of geotechnical engineering, there are three research methods for the above engineering problems: finite element method, field test method and model test method. Among them, the finite element method has the problem that the reliability of parameter selection has a great influence on the calculation results, and the manpower, material resources and test costs required ...

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Problems solved by technology

Among them, the finite element method has the problem that the reliability of parameter selection has a great influence on the calculation results, and the manpower, material resources and test costs required for field tests are relatively high

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