Super-gravity field high-frequency high-thrust single-degree-of-freedom horizontal vibrating table

Abstract

The invention discloses a super-gravity field high-frequency high-thrust single-degree-of-freedom horizontal vibrating table. The high-frequency high-thrust single-degree-of-freedom horizontal vibrating table uses double-cylinder parallel pushing and is suitable for the high-g-value centrifugal field. The overall eccentricity problem of the hanging basket can be solved through structural symmetrical layout; vibration of driving high load mass is realized through the mode of double-cylinder parallel pushing; the hydraulic cylinder of the hydrostatic bearing form is used so that the operation friction of the piston rod can be reduced and high frequency excitation can be realized; and the influence of the deformation of the vibrating table under the high-g-value centrifugal field on the deformation of the piston rod is reduced by applying the gapless transmission connecting device capable of producing shear deformation.

Description

technical field [0001] The invention belongs to the field of centrifuge supergravity experiments, in particular to a high-frequency and high-thrust single-degree-of-freedom horizontal vibrating table in a supergravity field. Background technique [0002] Based on the supergravity field environment provided by the centrifuge, the shaking table model test can generate the same self-weight stress as the prototype, truly reflect the dynamic response of the prototype under natural conditions, and reproduce the deformation and failure mechanism of the geotechnical structure under the action of an earthquake. Therefore, the centrifuge shaking table has become an important simulation test platform for solving related scientific problems in the fields of geotechnical engineering, environmental engineering and hydraulic engineering. [0003] At present, the single-degree-of-freedom horizontal vibration table mainly adopts the single-cylinder excitation method. The hydraulic cylinder i...

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Problems solved by technology

[0005] 1) Compared with the vibrating table, the hydraulic cylinder has a larger mass. Installing it on one end of the hanging basket will cause the eccentricity of the hanging basket. This eccentricity will bring additional bending moment to the arm of the centrifuge, especially at high Under the environment of g value, this additional bending moment will be amplified, which will affect the operation safety of the centrifuge;

[0006] 2) Limited by the installation space in the hanging basket and the overall eccentric range of the hanging basket, the size of the hydraulic cylinder is restricted. Under a certain oil supply pressure, the output of a single hydraulic cylinder is small, and the quality that can drive the load is also limited;

[0007] 3) When the piston rod in the hydraulic cylinder is supported by a support ring, the friction force of the support ring is relatively large. When the piston rod moves at high frequency, the friction force of the support ring will cause the movement of the piston rod to lag;

[0008] 4) Under the high-g centrifugal field, the vibrating table will have a large deformation. Due to the fast connection between the piston rod and the vibrating table, the deformation of the vibrating table will be directly transmitted to the piston rod, resulting in a gap between the piston rod and the cylinder body of the hydraulic cylinder. Grinding and stagnation between

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