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利用UG对两级涡轮轮盘/叶片进行三维实体建模,导入ANSYS构建其耦合振动分析的有限元模型,以静强度分析为基础,主要对比了有无温度场情况下,盘/叶耦合系统的振动特性差异,计算中考虑了温度场和离心载荷的影响,使计算结果更接近于实际情况,结果表明,温度不是影响涡轮盘/叶振动特性的主要因素。此外,从叶盘耦合谐振图可以看出,在工作转速下涡轮叶盘没有发生共振的危险;在起动时,只需快速的跨过一些共振区就能很好的避免耦合共振的情况发生,就振动设计而言,该型涡轮的设计是合理的。
The three-dimensional solid modeling of the two-stage turbine disk / blade was made by using UG, and the finite element model of coupled vibration analysis was constructed by ANSYS. Based on the static strength analysis, the comparison between the disk / The calculation results are close to the actual ones. The results show that temperature is not the main factor that affects the vibration characteristics of turbine disk / blade. In addition, it can be seen from the leaf disk coupling resonance diagram that there is no danger of resonance of the turbine disk at the operating speed; only a few crossings of the resonance region can be quickly passed to avoid the coupling resonance well at startup, In terms of vibration design, this type of turbine design is reasonable.