fundamental vibration meaning in Chinese

基本振荡
基本振动
基频振动
基谐振动

The fundamental vibration theory about bridge structure and the formation about the property matrix are introduced . according to the linear theory and the finite element method about space system of bars , the corresponding vibration analysis program is compiled . using this program , the natural frequencies about the wuhu changjiang river bridge are analyzed
首先介绍了桥梁结构的振动基本理论，然后介绍了对板桁结合斜拉桥的固有振动进行分析时所需用到的特性矩阵的计算方法，最后依据线性理论，采用空间杆系有限元法，编制了相应的斜拉桥结构的空间动力分析程序。