Testing system for testing vibration fatigue performance of aircraft fuel tank

Abstract

A testing system for testing vibration fatigue performance of an aircraft fuel tank is composed of an electromagnetic vibrator, a sample clamp, a signal output unit, a stabilized voltage supply, a frequency meter, a resistance strain gage, a dynamic resistance strain gauge, a sample and a clump weight. The clump weight is installed in the middle of the sample. The sample is mounted on the sample clamp, and pretension force can be applied by screwing studs on the sample clamp. The sample clamp is installed on the electromagnetic vibrator. The stabilized voltage supply is connected with the signal output unit. The signal output unit is connected with the electromagnetic vibrator so as to control the electromagnetic vibrator. The stabilized voltage supply is simultaneously connected with the frequency meter so as to monitor output excitation frequency. The resistance strain gage adhered to the sample is connected with a dynamic strain meter so as to monitor strain of the sample. The dynamic resistance strain gauge is connected with the frequency meter so as to monitor response frequency of the sample. The testing system has a simple structure, is convenient to operate and is used for testing vibration fatigue performance of an aircraft fuel tank. A test result has important engineering application value for evaluation of structure fatigue life.

Description

technical field [0001] The invention relates to a test system for testing the vibration fatigue performance of an aircraft fuel tank, belonging to the technical field of test and test. Background technique [0002] During actual use, due to engine rotor excitation, airflow disturbance and oil sloshing, aircraft fuel tanks will vibrate, resulting in vibration fatigue damage. In order to ensure its safety, it is necessary to test the vibration fatigue performance of aircraft fuel tanks. However, conventional fatigue testing machines can only be used for axial tension / compression fatigue tests. There is still no effective vibration fatigue test system for aircraft fuel tanks. For this reason, the present invention integrates electromagnetic vibrating table, sample fixture, signal output device, voltage stabilized power supply, calculation type frequency meter, resistance strain gauge, dynamic resistance strain gauge and sample into the test system of vibration fatigue performa...

AI Technical Summary

Problems solved by technology

[0002] In actual use, due to engine rotor excitation, airflow disturbance and oil sloshing, the aircraft fuel tank will vibrate, resulting in vibration fatigue damage

In order to ensure its safety, it is necessary to test the vibration fatigue performance of aircraft fuel tanks. However, conventional fatigue testing machines can only be used for axial tension / compression fatigue tests. For aircraft fuel tanks, there is still no effective vibration fatigue test system

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