normal frequency curve

• 常态次数曲线,正态频率曲线

normal frequency curve的用法和样例：

例句

1. Modal frequency and vibration response of the gear box are computed by structural FEM with a 3-D FE model.
   建立齿轮箱三维有限元模型，采用结构有限元法计算齿轮箱模态频率和振动响应。