Electromagnetic excitation supergravity vibration table simulation device and simulation method

Abstract

The invention provides an electromagnetic excitation supergravity vibration table simulation device and a simulation method. The simulation device comprises an electromagnetic excitation supergravitysystem, a vibration table system and an operation system. The vibration table system is arranged in the middle of the electromagnetic excitation supergravity system, the axis of the vibration table system coincides with the axis of the electromagnetic excitation supergravity system, and the operation system is composed of a power supply and a computer. The electromagnetic excitation supergravity system comprises Helmholtz coils, a high-strength acrylic plate frame and supporting legs. The Helmholtz coils are a pair of coaxial coils, and the distance between the coaxial coils is equal to the radius of the upper and lower coils. The upper coil and the lower coil are connected in series through a wire, after current is input, the magnetic field directions of the two coils in the axis direction are consistent, a uniform magnetic field parallel to the axis is generated in the middle area after mutual superposition, the upper coil and the lower coil are sealed through the high-strength acrylic plate frame, and the supporting legs are located at the bottom of the high-strength acrylic plate frame. The device can quickly, effectively and simultaneously realize supergravity and vibration table simulation of geotechnical engineering.

Description

technical field [0001] The invention relates to the field of civil engineering experiment testing, in particular to an electromagnetic excitation supergravity vibration table simulation device and a simulation method. Background technique [0002] Because earthquakes involve large-scale geotechnical engineering issues, it is difficult to obtain the soil response and dynamic deformation of structures caused by earthquakes through field tests. The indoor shaking table test can effectively observe the dynamic response of soil and structure under the action of earthquake by simulating earthquake load through mechanical force, and has become the most effective device in the field of civil engineering anti-seismic. There are two types of shaking table tests. One is to directly simulate the seismic response of soil-structures on a small scale (for example, 1 / 20 of the prototype test size) by using a shaking table with a scaled-down test box; The scaled-scale shaking table model is...

AI Technical Summary

Problems solved by technology

[0003] However, there are still unsolvable problems in the earthquake simulation test carried out by the supergravity centrifuge equipped with a shaking table

First, the high-gravity centrifuge generates centrifugal force to act on the test soil sample and its structure through high-speed rotation. The spin-up stage of the centrifuge will inevitably cause disturbance to the test sample. When facing the vibration test of the shaking table again, the simulation results will be Second, the high-speed rotating centrifuge will affect the application of the vibration force of the vibration table, resulting in the instability of the application of the vibration force. Similarly, the application of the vibration force of the vibration table will also affect the stability of the centrifugal force of the centrifuge

Third, the centrifuge shaking table system cannot be manually intervened in the test from time to time. After the centrifuge is rotated, the test content can only be carried out through the computer-controlled manipulator, which seriously affects the test efficiency and poor operability.

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