本文通过理论分析和推导得到了活塞驱动的指数形谐振管内气体的压力和压比的近似表达式。对指数形谐振管的各种驱动幅值,计算了管端压比随形状参数m的变化曲线,获得最大压比时的谐振管形状参数。本文的研究结果可用于活塞驱动的指数形谐振管内非线性振荡的分析和大声幅谐振管的设计。 In this paper, the approximate expressions of pressure and pressure ratio of gas in exponential resonant tube driven by piston are obtained through theoretical analysis and derivation. For various driving amplitudes of exponential resonant tube, the curve of tube end pressure ratio with the shape parameter m is calculated, and the shape parameters of the resonant tube at the maximum pressure ratio are calculated. The results of this paper can be applied to the analysis of nonlinear oscillations in piston-driven exponential resonant tubes and the design of large amplitude resonant tubes.