Structural vibration aging frequency acquisition method based on transfer dissipation correction

Abstract

The invention discloses a structural vibration aging frequency acquisition method based on transfer dissipation correction. The method comprises the following steps: S1, determining a structural inherent frequency based on a finite element means; S2, determining a dissipative effective surface based on a welding connection relationship; S3, determining the effective distortion rate of the dissipation surface based on residual stress ordinal position; S4, determining the effective inherent frequency of the dissipation surface based on the dissipation distortion rate; and S5, calculating the optimal vibration aging frequency based on transfer dissipation correction. The method is high in detection precision, and has important practical significance for accurately obtaining the optimal vibration aging frequency of the to-be-analyzed structure before the vibration aging process.

Description

technical field [0001] The invention relates to a method for detecting structural vibration aging frequency, in particular to a method for acquiring structural vibration aging frequency based on transfer dissipation correction. Background technique [0002] With the rapid development of industry, the workpiece will be affected and affected by various processes and other factors during the manufacturing process. If the above-mentioned effects and influences on the components cannot completely disappear, there will still be some effects and influences remaining on the components. Residual stress will be formed inside; for example, welding residual stress is the main cause of process defects such as deformation and cracking of weldments, and can even completely disconnect the weld, especially the tack weld, causing serious safety accidents. At present, vibration aging treatment is a method commonly used in engineering materials to eliminate the internal residual internal stress...

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Problems solved by technology

[0002] With the rapid development of industry, the workpiece will be affected and affected by various processes and other factors during the manufacturing process. If the above-mentioned effects and influences on the components cannot completely disappear, there will still be some effects and influences remaining on the components. Residual stress will be formed inside; for example, welding residual stress is the main cause of weldment deformation, cracking and other process defects, and can even completely disconnect the weld, especially the tack weld, causing serious safety accidents

At present, vibration aging treatment is a method commonly used in engineering materials to eliminate the internal residual internal stress, which makes the workpiece produce the largest vibration amplitude, and obtains the largest dynamic stress and kinetic energy, so that the residual stress in the workpiece can be eliminated more thoroughly. The dimensional stability of the workpiece is better; the traditional method is to select the natural frequency of the overall structure as the optimal excitation frequency, but the vibration aging frequency obtained by this method has certain limitations, and it cannot consider the impact of different welding surface connections. The effect of the frequency dissipation process

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