A locally resonant viscoelastic mass-spring cell is experimentally realized by a unit cell design fabricated by 3D printing. The standard linear solid model is introduced for the viscoelastic metamaterial. The complex band structures of both viscoelastic unit cell and elastic cases are presented to show the effect of viscoelasticity. Both the harmonic excitation and stochastic excitation are conducted on the finite viscoelastic metamaterial in experiments. Distinct wave attenuation is found in bandgap via sweep frequency response analysis under harmonic excitation. The experiments of the metamaterial under narrow-band noise excitation demonstrate good performance of wave attenuation in bandgap. Finally, the obtained bandgaps via numerical calculation are well consistent with the frequency ranges of wave attenuation from experiments, which confirm the effectiveness of the proposed viscoelastic model.

通过 3D 打印制造的单元单元设计，通过实验实现了局部共振粘弹性质量弹簧单元。为粘弹性超材料引入了标准线性实体模型。呈现粘弹性晶胞和弹性情况的复杂带结构以显示粘弹性的影响。实验中对有限粘弹性超材料进行了谐波激励和随机激励。通过谐波激励下的扫描频率响应分析，在带隙中发现了明显的波衰减。超材料在窄带噪声激发下的实验证明了带隙中的波衰减性能良好。最后，通过数值计算得到的带隙与实验中波衰减的频率范围非常吻合，