CAJ | 학술논문

推导了管道中导波传播的有限元方程，使用 ANSYS 有限元软件建立了管道模型；对导波进行模态分析，得到了管道模型的一系列特征频率与振型，通过对管道振型的模态识别，提取了管道中各模态导波的模态特征，计算得到了管道中导波的频散曲线，该曲线与解析法所得到的频散曲线相吻合。该方法可以应用于周期性重复组合的任何结构（如横截面固定的杆、板、管）中导波的频散曲线计算。
추도료관도중도파전파적유한원방정，사용 ANSYS 유한원연건건립료관도모형；대도파진행모태분석，득도료관도모형적일계렬특정빈솔여진형，통과대관도진형적모태식별，제취료관도중각모태도파적모태특정，계산득도료관도중도파적빈산곡선，해곡선여해석법소득도적빈산곡선상문합。해방법가이응용우주기성중복조합적임하결구（여횡절면고정적간、판、관）중도파적빈산곡선계산。
The finite element formulation of guided wave propagation in the pipe is studied.A pipe model is established with software ANSYS,and a series of eigenfrequencies and modal shapes are ob-tained from the modal analysis.The discrimination of the modal shapes of the pipe model results in extracting the characteristics of different mode guided waves,and obtaining the dispersion curves through calculation.The curves match very well with those obtained from the analytical solution. This method is of practical value because it can be applied to any structures of periodic repeated combi-nation (such as rods,plates and pipes with constant cross-section).