A kind of bolt connection looseness testing system

Abstract

The invention provides a loose bolt connection test system, which comprises a shock excitation device, a control system, a test device and a flexible hanging device, wherein the shock excitation device is connected with the test device; the shock excitation device can generate shock excitation and enables the test device to resonate; the test device comprises a bolt connection test piece; the flexible hanging device comprises a flexible rope; the test device is flexibly connected with the flexible hanging device through the flexible rope; the test device is hung below the flexible device; andthe control system is electrically connected with the shock excitation device, so as to control the shock excitation device to generate the shock excitation. The loose bolt connection test system is reasonable in structural design and small in volume; all the parts are connected tightly; and an applied load can be amplified through the resonance principle, thus fulfilling the aim of loading a highload.

Description

technical field [0001] The invention belongs to the technical field of bolt connection, in particular to a bolt connection loosening test system. Background technique [0002] In recent years, with the rise of prefabricated structures, bolted connections have been widely used in structural connections due to their advantages such as convenient connection, high connection strength, easy disassembly and maintenance. Bolt connection is an important contact pair to ensure the transmission of force or moment between two connected components and the sealing performance of the sealing structure. The mechanical properties of bolt connection directly affect the strength and reliability of the connected structure, and are important indicators for the overall performance evaluation of the structure. [0003] At present, the existing technology of the bolt loosening test system is mainly used in the connection of steel structures and large-scale composite structures. The load is relativ...

AI Technical Summary

Problems solved by technology

exist figure 1 The bolt connection loosening test system shown in the figure has relatively rough connections, and the loading of the specimen is mainly completed by the speed regulation of the motor. Due to the power limitation of the motor, the loading load and loading frequency are limited, and the dynamic load cannot achieve large loads. Or ultra-large load and high-frequency state loading, only the bolted connection mechanism with small bolt preload and low load frequency can be tested

[0007] In addition, the driving motor, the driving connection mechanism, and the test bench for the test piece are too large due to the requirements of the test strength and cannot be effectively integrated. The test system and its loading system are large in size and low in energy utilization

[0008] The working principle of the overall test and test device is relatively simple, and the control intelligence and versatility are not high, and multiple tests cannot be performed. If multiple tests are required, it will cost a lot of money

Images