基于扫频法的简支梁模态参数测定  

The Test of the Modal Parameter of the Free Beam Based on Frequency Sweep Method

作　　者：归文强 袁小慧[1] 夏芝安 

机构地区：[1]长安大学汽车学院,陕西西安710064

出　　处：《汽车实用技术》2016年第2期100-102,共3页Automobile Applied Technology

摘　　要：在机械工程中振动是很普遍的现象,分析系统的固有频率和固有振型可以避免系统在使用过程中出现共振现象,减少振动对系统的影响。用扫频法得到简支梁系统的固有频率和固有振型,与理论值进行对比误差不大于3.8%。测定简支梁的模态参数为研究复杂系统提供理论基础和参考方法。The vibration is a common phenomenon in mechanical engineering. Analyzing the natural frequencies and natural vibration types of the system can avoid the resonancephenomenon in the course of using and reduce the influence to the system. The natural frequencies and natural vibration types of the free beam that was got by frequency sweep method are similar to the theoretical data, and the error is not biggger than 3.8%. The test of the modal parameter of the free beam can provide methods and theoretical basis to the study of the complex systems.

关 键 词：简支梁 固有频率 振型 共振 

分 类 号：U463.5[机械工程—车辆工程]