导波激励模态单一性与衰减特性是导波激励效果的重要指标。采用PZT传感器,在建立基于PZT-5材料传感器并置于管道一端均匀对称分布的导波激励系统的基础上,以模态单一性与降低衰减特性为目标,研究了在低频段内模态特性以及传感器对T(0,1)模态的影响,得出了激励T(0,1)模态的最优激励方案。
Modal unity and attenuation characteristics are important indicators of the incentive effects of guided wave. A guided-wave excitation system is established in which the PZT-5 wafers are symmetrical distributed at one end of the pipeline. In order to reduce the modal unity and attenuation characteristics,experiments have been conducted to study the effect of PZT wafer and modal characteristics on the T( 0,1) mode. The optimal scheme to excitation of T( 0,1) mode is obtained.