Abstract
Nonlinear superharmonic vibratory stress relief (VSR) is an effective way to solve the resonance problem of a high stiffness workpiece. However, strong nonlinear factors are present, and superharmonic resonance is relatively complicated when the entire device is a strongly nonlinear system. Choosing the best nonlinear stiffness parameter of the spring to allow the superharmonic resonance to generate a sufficient amplitude and sufficient dynamic stress becomes difficult. To solve this problem, it is necessary to explore the effect of the stiffness parameter on the system resonance: First, the nonlinear vibration situation of the VSR device is analysed, and the effect of the stiffness parameter on the vibration characteristics is explored under the action of the strong nonlinear system. Then, a simulated vibration table is used to verify the rule that the stiffness parameters affect the superharmonic resonance. It was shown that strong nonlinear theory provides a theoretical basis for simulating vibration table experiments, and the relationship between the spring stiffness parameter and amplitude satisfies a certain relationship, which provides a useful reference for the application and research of the VSR device for nonlinear superharmonic resonance.
Highlights
Eliminating the residual stress of components in the process of manufacturing is an important goal in the field of mechanical manufacturing
The principle of Vibratory stress relief (VSR) was proposed by the Wozney & Crawmer criterion [7]: ‘‘when the sum of the dynamic stress in VSR and residual stress is greater than the yield limit of the materials and is less than the fatigue limit of the materials, the residual stress will be relaxed and released’’, which is considered to be the most important VSR condition
This paper studies the VSR device for nonlinear superharmonic resonance
Summary
Eliminating the residual stress of components in the process of manufacturing is an important goal in the field of mechanical manufacturing. L. Zhao et al.: Influence of the Nonlinear Stiffness Parameter of the VSR Device stress relief (UVSR), the core of which is to use ultrasonic transducers to obtain a high excitation frequency and excite the component.
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