Study on the Spring Design Method of the Nonlinear Super-Harmonic Resonance Aging System
In order to solve the difficulty in obtaining the nonlinear parameters required by the nonlinear super-harmonic reso-nance aging system,taking the core element of the system-the nonlinear spring as the research object,a unequal pitch cylindrical spiral spring structure parameter design suitable for this system is proposed,so that achieve the super-harmonic resonance that the system wants to achieve.First,according to the spring mechanics characteristic curve required for the vibration aging of the work-piece,the structural parameters of the unequal pitch cylindrical spiral spring used in the system are calculated.Secondly,the feasi-bility of the spring design method was proved through spring compression test.Finally,with the cylindrical workpiece as the test ob-ject,a nonlinear super-harmonic moving table is built for experimental research.The results show that the the nonlinear super-harmonic vibration test bench under the action of the unequal pitch coil spring designed by the reverse design method can produce super-harmonic vibration,and can produce high-order super-harmonic frequencies higher than 200Hz,it is of great significance to popularize the nonlinear super-harmonic vibration stress relief method in reducing the residual stress of high-rigidity work-pieces.
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