By varying the groove spacing, the diameter of the single or double diameter hole, and the rear air cavitydepth and content, one can obtain absorption over a wide variety of frequencies.
And then a theory on the penetrating depth, the number of impact and the relation between penetrating resistance and depth was obtained by means of dynamic spherical cavity expansion.
应用动态球腔扩张理论,建立了冲击贯入方程、冲击次数表达式和贯入阻力与贯入深度的关系。
3
A micro cavity stamping equipment is developed and its mechanism is especially designed to ensure the stamping depth accuracy.