本文以铝合金自行车粘接车架的模态分析为例,说明了现代结构动力学用试验和理论计算以及实验与分析相关的方法对结构系统进行模态分析的具体方法,简述了结构模态分析在提高产品设计、制造和检验质量上的作用。本文介绍的实验和计算方法是可靠和实用的,也完全适用于其它机械和结构。 This paper takes the modal analysis of aluminum alloy bicycle frame as an example to illustrate the modern structural dynamics with experimental and theoretical calculations and experimental and analytical methods related to the modal analysis of structural systems specific methods, State Analysis in improving the quality of product design, manufacturing and testing role. The experimental and computational methods described in this article are reliable and practical and are well suited for other machines and structures.