On the basis of these results and through calculation of the torsion moment on the cross section, a theoretical formula of the flexuralcenter is derived for the cylinder.
基于上述结果并通过对横截面上扭矩的计算，导出了用于计算柱体弯曲中心的理论公式。
2
Key parts including piezoelectric transducer and amplitude transformer with a cylindrical hole in the center, and flexural vibration disk are analyzed and calculated.