Dynamic test loading device

Abstract

The invention discloses a dynamic test loading device, which comprises a rigid support, a back support plate, an air spring, a loading plate, a thrust bearing, an adapter, an adjustment device, an adapter rod, a pressure regulating valve, an exciter, and a force sensor , there is a rigid bracket under the back support plate, the air spring is located on one side of the back support plate, the loading plate is located at one end of the air spring, the thrust bearing is connected to one side of the loading plate, the other side of the loading plate is connected to the adapter rod, and the adapter is located on On the thrust bearing, the adjustment device is located at the top of the loading plate, the pressure regulating valve is connected with the air spring, the vibration exciter is connected with the transfer rod, and the transfer rod is provided with a force sensor. The invention has low additional rigidity and mass, and can simultaneously apply high static load and low dynamic excitation force.

Description

technical field [0001] The invention relates to a loading device, in particular to a dynamic test loading device. Background technique [0002] In some structural dynamic experimental tests, especially when performing dynamic response tests on experimental systems containing propulsion shafting (such as ships, aircraft, etc.), in order to truly simulate its working state, it is not only necessary to impose different forms of pressure on the measured object. The dynamic excitation force also needs to apply a higher static thrust synchronously to simulate its actual working state (such as the static thrust generated when the propeller is running, etc.). Generally, the excitation devices commonly used in structural dynamic testing institutes can be divided into mechanical, electromagnetic and hydraulic types. For mechanical and electromagnetic excitation devices, due to the limitations of their own operating principles, when a dynamic excitation force is applied to the measure...

AI Technical Summary

Problems solved by technology

However, in addition to the disadvantage of low excitation frequency, the hydraulic actuator also has a very low compressibility of the hydraulic fluid, which will cause the hydraulic system itself to form a very high stiffness system when the static force is applied. A very rigid boundary is introduced at the same time as the force is applied, and the result usually greatly affects the dynamic characteristics of the tested structure itself, thus causing the test results to deviate far from reality, and it is difficult to achieve the expected experimental results

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