Abstract: In previous researches, the bending wave characteristics of infinite single stiffened plates and of cruciform stiffened plates have been studied. On this basis, the frequency band loss characteristics of finite size pallet structures are studied. Numerical calculations are used to separate the incident wave from the primary reflected wave in a finite size plate frame structure to verify the applicability of the energy dissipation mechanism in bending waves in a finite size plate frame structure. Taking the research object of one-dimensional rib structures under closed systems, the energy attenuation characteristics caused by the plate structure under standing wave frequencies are analyzed. The energy dissipation of the plate structure under a rib excitation is characterized by the displacement attenuation coefficient in wave (a) and the loss factor in vibration (η). A quantitative relationship between the two is established based on the principle of energy balance, and the validity of the quantitative relationship is verified through a parametric research (different standing wave frequencies and geometric parameters). Finally, the accuracy of the displacement attenuation coefficient-loss factor quantitative formula is verified through experiments.