含液管一般指的是输水管和输油管。广义地讲,也包括天然气管和水力输送管。随着我国引水工程和能源建设的发展,这类管道的兴建必将与日俱增。因此,许多技术问题业已提到日程上来,振动问题就是其中之一。而自由频率又是研究振动系统不可缺少的数据。查现有文献资料,有关管道自由频率的计算方法尚不够完善,故有必要加以改进,以提高设计水平,更好地解决工程问题。 Containers generally refers to the water pipes and pipelines. Broadly speaking, natural gas pipes and hydraulic pipes are also included. With the development of diversion projects and energy construction in our country, the construction of such pipelines will surely increase day by day. Therefore, many technical issues have been mentioned on the agenda, the issue of vibration is one of them. The free frequency is an indispensable data to study the vibration system. Check existing literature, the calculation of the frequency of free channels is not yet perfect enough, it is necessary to be improved in order to improve the design level, to better solve engineering problems.