基于经典的平面应变假定，推导出了管桩动力响应的频域解析表达式。分析了土体剪切模量、阻尼系数、桩芯土、桩径等对振动特性的影响。计算结果表明：土体剪切模量越大，速度导纳曲线和复动刚度曲线振荡幅值越小；土体阻尼系数越大，速度导纳曲线振荡幅值越小；桩周土对桩壁的摩阻力要比桩芯土大；桩径越小，桩芯土对桩的作用力越小。

On the basis of classical plane strain case, the analytical solution on dynamic response of pipe pile in frequency domain was derived. The influences of soil shear modulus, damping coefficient, inner soil and diameter on vibration characteristics were studied. Numerical results indicated as follows: The oscillating amplitude of velocity admittance curve and dynamic complex stiffness curve is reduced with the increase of soil shear modulus and damping coefficient. The frictional resistance of outer soil is larger than that of the inner soil. The resistance of inner soil is reduced with the decrease of pile diameter.