到目前为止，螺旋桨风扇的振动传统上是以经验的方式来处理的。很多时候，风机的设计不是从振动的角度，甚至不是从图纸上的故障角度，而是在第一个原型制造和空气动力学性能测试后考虑这些观点。基本上，这种方法没有错；它由来已久，而且行之有效。然而，偶尔会出现令人困惑的故障或噪声产生效应。这些问题令人费解，虽然它们最终通过实验性的侦查工作和试错程序得以消除，但人们通常无法以防止再次发生的方式来理解它们。 以下注释本身并不构成设计程序。他们试图通过简单、孤立的数学模型来讨论风机中的实际和潜在振动效应，为其他论文（1）中已经收集到的信息提供额外的信息。引文:加利福尼亚州洛杉矶ASHRAE Transactions第80卷第1部分

Propeller fan vibrations, so far, are traditionally approached in an empirical manner. Fans are many times not designed from a vibration viewpoint or even failure viewpoint at the drawing board, rather, these viewpoints are taken into account after the first prototype has been built and tested for aerodynamic performance. Principally, there is nothing wrong with this approach; it is time-honored and it works. However, once in a while rather baffling failures or noise generation effects occur. These present puzzling problems and, while they are eventually eliminated by experimental detective work and by trial and error procedures, are usually not understood in a manner that prevents reoccurrence.The comments that follow do not by themselves constitute a design procedure. They are rather an attempt to discuss real and potential vibration effects in fans by means of simple, isolated mathematical models to provide additional information to that already collected in other papers (1).