基于有限元方法理论计算影响系数在工程中的应用

Based on the Theory of Finite Element Method Calculation Influence Coefficient in the Engineering Application

以300MW汽轮发电机组为研究对象,按照机组图纸尺寸,运用ANSYS工具,建立有限元数值分析模型。数值计算不同型式不平衡故障下轴系振动响应特性,并得到相应的加重影响系数和滞后角度,最后应用到工程实例中。得到结论:高中压转子跨内加重相邻轴承振动响应灵敏度高于跨外加重;理论计算结果与工程较吻合,分析结果能够较好地指导实际工作,提高动平衡处理成功率。

300MW turbo-generator set as the research object, According to the drawing size of unit, using ANSYS calculation tools, the finite element numerical analysis model is established. Numerical calculation different type imbalance fault, shafting vibration response characteristics, and get the corresponding increase influence factor and lag angle, finally applied to the engineering instance. Come to a conclusion： Rotor cross inside aggravate adjacent bearing vibration response sensitivity is higher than outside; The theoretical results fit well with and engineering. The results of the analysis can better guide the actual work, improve the success rate of dynamic balance processing.