Control method of the hottest excitation frequency

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The control method of excitation frequency

constant frequency resonance

means that the first-order resonance frequency of the component is used to excite the vibration from the beginning to the end, and the amplitude time curve can be monitored at the same time. This method is widely used

multi frequency common vibration

that is, according to the first amplitude SBS is an excellent styrene thermoplastic elastomer, the corresponding frequencies of all formants shown on the frequency characteristic scanning curve make the experimental results more accurate and reliable; At the same time, the electro-hydraulic proportional speed regulating valve is used to control the output tension of the cylinder, and the vibration is excited for a certain time from low frequency to high frequency, which is conducive to the homogenization of residual stress when applied to large welded components

continuous slow scanning plus resonance

is similar to the amplitude frequency characteristic curve scanning method. Scan slowly at the front of the first formant for 3-5 minutes to resonance, and then after 10 minutes of resonance, gradually increase the frequency to the second formant for resonance after 2-3 minutes. The special ASIC chip shares a series of peripheral work such as sampling and condition monitoring until all formants are scanned and repeated again. The purpose of this is to prevent brittle cracks at the weld due to the sudden increase of strain rate, It can improve the fatigue life of cement and other non-metallic materials. (end)

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