摘要
对超大型电站发电机用某段高压离相封闭母线的固有频率进行了研究。首先建立等效简化的物理模型 ,在多自由度系统的能量法基础上 ,建立Lagrange第二类方程 ,得到惯性矩阵 [M ]和刚度矩阵 [K]构成的无阻尼的空间模型 ,求得母线不同方位的相应多阶固有频率。运用ADAMS工程软件对物理模型进行仿真模拟 ,并将模拟结果与计算值进行了对比。结果证明所求母线的固有频率符合设计要求。
The free frequency of the high-voltage separated-phase closed bus wire used in a super-large-sized power station is studied. Firstly,the simple equivalent physical model is built. Then,the second type of the Lagrange formula is established on the basis of the energy method of the multi-freedom-degree system. The spatial model without damp composed of inertia matrix [ M ] and rigidity matrix [ K ] is established to obtain the multi-order free frequency in different directions of the closed bus wire. The ADAMS software is used to simulate the physical model,and the simulated results are compared with those calculated. The results show that the value of the closed bus wire free frequency obtained is suited for the design requirement.
出处
《中国农村水利水电》
北大核心
2004年第5期81-82,85,共3页
China Rural Water and Hydropower
