By using Fresnel and Fraunhofer diffraction theory, the reason for the occurrence of resonance in the periodic rebar array is explained, with the derivation of the resonance frequency expression.

• 应用菲涅耳及夫琅和费标量衍射理论解释了钢筋网出现谐振的现象，给出了钢筋谐振频率遵循的公式。