Cyclic dynamic loading-confining pressure instantaneous unloading test device and its application method

A cyclic dynamic loading-confining pressure instantaneous unloading test device, which is characterized in that it includes a load-supporting frame system, a cyclic dynamic loading system, a confining pressure loading system, a monitoring system, a control system and a data analysis system;

• the top of the load-supporting frame system is equipped with the cyclic dynamic loading system, the cyclic dynamic loading system is connected with the control system, the bottom of the load-supporting frame system is equipped with the confining pressure loading system, the cyclic dynamic loading system and the confining pressure loading system are equipped with the monitoring system, the monitoring system and the control system are connected with the data analysis system;
• the confining pressure loading system includes the first arc confining pressure plate, the second arc confining pressure plate, the third arc confining pressure plate and the fourth arc confining pressure plate;
• the first arc confining pressure plate and the second arc confining pressure plate are connected by bolts;
• the second arc confining pressure plate is connected with the fourth arc confining pressure plate through the first hinge;
• the fourth arc confining pressure plate is connected with the third arc confining pressure plate through the second hinge;
• the third arc confining pressure plate is connected with the first arc confining pressure plate through the third hinge.