Vibration time-effect vibration level real-time testing system and automatic adjustment method

Abstract

The invention relates to a real-time vibration-aging vibration level testing system. The real-time vibration-aging vibration level testing system comprises a processor, a signal generator, a driver, a vibration exciter, an acceleration sensor, a charge amplifier, an oscilloscope and a support device, wherein a member is fixedly connected with the vibration exciter; the processor controls the signal generator to output sinusoidal excitation signals, of which the amplitude and frequency are independent and are continuously adjustable; the processor comprises a voltage waveform reading module, a voltage identification module, a vibration level detection module and a critical threshold setting module. An automatic vibration level adjustment method comprises the steps that the member is fixedly connected with the vibration exciter; the vibration level detection module is subjected to parameter value setting; the voltage waveform reading module acquires a voltage waveform displayed by the oscilloscope; the voltage identification module acquires voltage peaks; the processor determines first excitation frequency of vibration aging; the processor determines second excitation frequency of vibration aging and enables the vibration exciter to carry out vibration aging treatment on the member at the second excitation frequency. The system and the method have the advantages that the vibration level can be accurately tested in real time, and the vibration level can be adjusted automatically.

Description

technical field [0001] The invention relates to a real-time testing system and an automatic adjustment method for vibration time-effect and vibration level. technical background [0002] Vibration aging technology is a commonly used residual stress control method in the field of mechanical engineering. It applies a mechanical vibration load to the component. When the sum of the residual stress inside the component and the additional vibration stress exceeds the local yield limit of the material, the material will undergo local plasticity. Deformation, so that the residual stress inside the material can be relaxed and reduced. The closer the excitation frequency is to the natural frequency of the component, the greater the additional dynamic stress acting on the component, that is, the greater the vibration level acting on the component, which is more conducive to eliminating the residual stress of the component. [0003] In the document "Vibration Aging Process and Effect E...

AI Technical Summary

Problems solved by technology

It is found from the above technical literature that the natural frequency value of the component will become smaller during the vibration aging treatment process, so that the difference between the excitation frequency value and the actual natural frequency value of the component will become larger and larger, and the resonance effect will become worse and worse, resulting in the effect on the component. The vibration level is getting smaller and smaller, which reduces the effect of eliminating residual stress

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