摘要
为得到某锥壳构件的动态特性进行了模态试验,对得到的频响函数通过最小二乘复指数和多参考最小二乘复频域等方法进行模态参数识别,识别结果与有限元计算结果进行比较,得出了锥壳结构的动态特性,通过比较识别结果,说明了模态识别方法的适用性。
An experiment on conical shell has been performed. All the modal parameters estimation is based upon FRFs. For modal analysis, three different estimation techniques are used： Least Square Complex Exponential method （LSCE） and Polyreference Least Complex Frequency method （PolyLSCF or PolyMax）. The modal parameters such as, modal frequency, damping ratios and modal shape, and relative merits of every method are concluded. By comparing the modal parameters with the results of finite element calculation using Nastran 2005, dynamic behavior of the structure is given.
出处
《强度与环境》
2010年第3期34-40,共7页
Structure & Environment Engineering
