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发展了用于三维叶轮机气动弹性计算的软件系统AEAS(aeroelastic analysis system).该系统采用时间推进法求解转子叶片的瞬态位移及动应力,以模拟压气机转子中的气动弹性现象.AEAS主要应用于强迫响应分析和颤振分析,强迫响应分析中,在坎贝尔图上共振点对应的工况下,在转子叶片上施加周期性变化的非定常压力场,通过计算动应力的振幅预测转子的危险应力状态;颤振分析中,交替调用结构求解模块和非定常流体求解模块,通过所获得的叶片瞬态动应力预测颤振是否发生.对真实叶片进行气动弹性计算,可以看出所提供的方法和软件系统可以直观地反映流体作用下叶片的振动形式和动应力水平,具有工程应用价值.
The software AEAS (aeroelastic analysis system) is developed for the aerodynamic elasticity calculation of three-dimensional impeller. The system uses time-propulsion method to solve the rotor blade transient displacement and dynamic stress to simulate the aeroelastic phenomenon in the compressor rotor. Applied to forced response analysis and flutter analysis, the forced response analysis is applied to the unsteady pressure field with cyclical variation on the rotor blade under the corresponding resonance point on the Campbell diagram, and the rotor’s In the flutter analysis, the structural solution module and the unsteady fluid solution module are invoked alternately to predict whether the flutter occurs through the transient dynamic stress of the blade.Aeroelastic calculation of the real blade shows that the method provided And the software system can intuitively reflect the vibration form and the dynamic stress level of the blade under the action of the fluid and has the engineering application value.