A cylindrical and conical composite horn is designed theoretically to improve its shape coefficient, increase its amplification factor and so on. 摘要為了改善變幅桿的形狀因數，增加放大系數，用解析法設計了一種圓錐過(guò)渡復合變幅桿，計算了它的動(dòng)力學(xué)參數。
Finally, the torsion vibration nature frequency and torque amplitude factor of a rolling mill are calculated by using finite element method. 最后使用有限元法計算了某鋼廠(chǎng)冷軋機主傳動(dòng)軸系的扭振固有頻率和轉矩放大系數。
