Earthquake simulation device

Abstract

The invention discloses an earthquake simulation device which comprises a platform and a base; a movable supporting rod is arranged between the base and the platform; the included angle between the supporting rod and the base ranges from 45 degrees to 90 degrees; and a driving mechanism is arranged on the base. The driving mechanism can apply a first acting force and a second acting force which are parallel to the platform to the platform so as to be matched with the four supporting rods to enable the platform to be switched between the horizontal state and the inclined state, wherein the direction of the first acting force is perpendicular to the direction of the second acting force. A surface formed by connecting points of the supporting rod and the platform and a surface formed by the supporting rod and the base are coaxial rectangles, and sides of the two surfaces are respectively parallel to the first acting force and the second acting force. According to the scheme, the structure is simple and exquisite, longitudinal translation of the platform and inclination in the diagonal direction can be achieved through cooperation of the angle of the supporting rod and stretching and retracting of the upper display, and multi-directional and multi-degree-of-freedom ground wave simulation can be achieved.

Description

technical field [0001] The invention relates to the technical field of earthquake simulation mechanisms, in particular to an earthquake simulation device. Background technique [0002] Seismic waves are elastic waves that radiate outward from the source. When an earthquake occurs, the medium in the source area ruptures and moves rapidly, and this disturbance constitutes a wave source. Due to the continuity of the earth's medium, this fluctuation propagates to the interior and surface of the earth, forming elastic waves in the continuum. [0003] Seismic waves are divided into three types according to the propagation mode: longitudinal wave (P wave), transverse wave (S wave) and surface wave (L wave). [0004] Longitudinal wave: The longitudinal wave is a propulsive wave. The propagation speed in the crust is 5.5-7 km / s. It reaches the epicenter first, also known as P wave. It makes the ground vibrate up and down and is less destructive. [0005] Shear wave: Shear wave is ...

AI Technical Summary

Problems solved by technology

The utility model has the advantages of light weight and simple spatial structure, but the structure can only simulate the state of the transverse wave and the longitudinal wave through a single translation, and at the same time, since the bottom of the seismic platform 1 has only one direction of the motor and the guide rail mounting seat , so the seismic platform can only simulate shear waves in one direction. At the same time, due to the small area of ​​the entire platform, the earthquake simulation state can only be experienced by naked eyes, which is not enough experience

[0008] In the prior art, there are also improvements to simple seismic platforms. On the basis of completing the simulation of shear waves and longitudinal waves in a single direction, in order to realize the flipping of the platform in the direction of inclination, and to simulate the movement state of surface waves, such as The Chinese patent application number is: "202020857213.7", and the utility model patent titled "A multi-degree-of-freedom motion platform and a multi-degree-of-freedom motion earthquake simulation platform" discloses a seismic platform, wherein the multi-degree-of-freedom motion platform includes a base , a first intermediate support, a second intermediate support, a top platform, a transverse drive device, a longitudinal drive device and an inclined drive device; the base, the first intermediate support, the second intermediate support and the top platform are composed of the following Arranged in sequence from top to bottom; the horizontal drive device drives the first intermediate support to move laterally; the longitudinal drive device drives the second intermediate support to move longitudinally; the tilt drive device is arranged on the second intermediate support, Drive the top platform to tilt and flip. The seismic platform can simulate the combined movement of the horizontal direction, the vertical direction and the horizontal direction alone, and can also simulate the tilt movement in the vertical direction, achieving a high degree of freedom. However, the seismic platform needs to pass through multiple layers. The platform, the bracket, and the driving devices in different directions work together to realize the movement, and the structure is complex. At the same time, because the tilted vertical telescopic assembly and the rotating support jointly form three fulcrums, but only two of the fulcrums are vertically telescopic. The components can change the height, so the inclination direction of the platform has only two diagonal directions (that is, any one of the fulcrums of the two vertical telescopic The fulcrum of the straight telescopic assembly rises above the height of the swivel support or descends to the height of the swivel support to form a platform tilt), although the structure has been controlled by drive mechanisms in different directions, it has not yet achieved tilting in more angles and directions

[0009] At the same time, the above two existing technologies do not reflect the characteristic that the energy density of the surface wave when propagating on the spherical surface gradually decreases to gradually increases. For a large process, the simulation of the surface wave is not detailed and realistic enough, and to realize this feature, it is often necessary to constantly adjust the power of the driving mechanism, which is complicated to operate

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