In this paper, a formulation is given to the calculation of the driving-point impedance of an infinite beam carrying a concentrated mass, which represents a finite system of the same kind from the view point of the frequency average impedance in this work.
本文从测定统计能量参数需用的点阻抗的频率均值出发，将有限梁用相应的无限梁代替，给出了带集中质量无限梁点阻抗的计算公式，并附有实验。
The Driving-Point Impedance of an Infinite Beam Carrying a Concentrated Mass-The Application of Driving-Point Impedance to Experimental Determination of SEA Parameters
带集中质量无限梁的点阻抗计算&点阻抗在统计能量参数测定中的应用
All aspects of applying the complex impedance analysis method to study on the aging characteristics of PTCR were discussed in the paper. The equivalent electric circuits of PTCR and its macro and micro parameters ` calculation were been concentrated on.
阐述了用复阻抗分析的方法来研究PTCR（正温度系数电阻PositiveTemperatureCoeficientResis－tance）老化特性的有关方面，重点论述了PTCR的等效电路及其宏微观参数的计算等问题。
Analytical solution in frequency domain of dynamic response of thin-wall pipe piles with variable wave impedance under low strain transient concentrated load
变频器在二次方率负载调速中的运用低应变下变阻抗薄壁管桩动力响应频域解析解