Loading system for applying vertical loads based on geotechnical centrifuge

Abstract

The invention relates to a loading system for applying vertical loads based on a geotechnical centrifuge. The loading system is composed of a load bearing support vertically arranged on a side plate of a model box, a loading mechanism arranged on the load bearing support and a controller for controlling the loading mechanism. The vertical loads are applied to a model in the model box of the geotechnical centrifuge, and a power transmitting chain is formed by an output shaft of a stepping motor (11), a vertically-arranged speed reducer (10), a shaft coupler (9), a lead screw (13) and a nut base (5) arranged on the lead screw (13) in a sleeving mode in sequence. A lead screw nut (6) is fixed to the nut base (5), the lead screw nut (6) and two thrust rods fixed to the nut base (5) form a whole, and the lead screw nut (6) drives a thrust base (15) to increase loads or reduce loads of the model. By means of the loading system, the defects in an existing loading technology can be effectively overcome, a more scientific loading mode is provided for testing of the geotechnical centrifuge model, and important technological supports are provided for further researching of deformation and damage mechanisms of soil bodies and buildings (structures).

Description

technical field [0001] The invention belongs to geotechnical test equipment, in particular to a loading system for applying vertical load based on a geotechnical centrifuge. It is mainly used in the geotechnical centrifugal test environment to simulate the load of buildings (structures), so as to truly reproduce the interaction relationship between the prototype soil and structures, and provide a basis for further research on the deformation and failure mechanisms of soil and buildings (structures). important technical support. Background technique [0002] The geotechnical centrifuge model test is to place the 1 / n scale model in a special centrifuge and conduct the test in the space of ng centrifugal acceleration. Due to the absolute equivalence of inertial force and gravity, and centrifugal acceleration will not change the properties of foundation materials, their mechanical characteristics can also be kept similar under the premise of ensuring similar geometry to the pro...

AI Technical Summary

Problems solved by technology

However, the worm gear of this mechanism is seriously worn, and the phenomenon of heat generation and oil leakage of the reducer is common; and the system uses a single-chip microcomputer as the controller, and its anti-interference ability is relatively poor, and the system needs to design its own power supply, so the reliability of the system operation is difficult to guarantee.

Images