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，增加放大係數，用解析法設計了一種圓錐過渡複合變幅桿，計算了它的動力學參數。
Finally, the torsion vibration nature frequency and torque amplitude factor of a rolling mill are calculated by using finite element method. 最後使用有限元法計算了某鋼廠冷軋機主傳動軸系的扭振固有頻率和轉矩放大係數。
