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总结了对于汽轮机叶片流体激振安全性进行全三维、全功能与全方位分析的概念和方法。全三维是对流体激振安全性的分析建立在三维粘性和三维振型的基础上 ,全功能是对流体激振分析建立在弹性力学方程和流体力学方程弱耦合的基础上 ,进而得到流体激振时的动应力并与疲劳寿命相联系。全方位则是可以对汽轮机叶片的各种形式的流体激振 (如小流量下失速流激振、叶尖间隙流激振等 )和强迫振动 (如部分进气激振、静叶尾迹流对动叶的激振、抽汽口激振等 )进行安全性分析。这种流体激振三全系统 (全三维、全功能、全方位 )的建立 ,将是汽轮机叶片的安全性分析水平的重要进展
The concepts and methods of full three-dimensional, full-function and omni-directional analysis of fluid exciting safety of steam turbine blades are summarized. Full three-dimensional analysis of the fluid excitation safety is based on the three-dimensional viscous and three-dimensional vibration modes. The full function is based on the weak coupling of the elastic mechanics equations and the hydrodynamic equations for fluid excitation analysis, Dynamic stress when vibrating and associated with fatigue life. In all respects, various forms of fluid excitation (such as stall flow excitation at small flow rate, tip-gap flow excitation, etc.) and forced vibration (such as partial intake excitation and vortex shedding flow pairs) Rotor excitation, pumping port excitation, etc.) for safety analysis. The establishment of such a three-fluid system (full three-dimensional, full-featured, omnidirectional) of fluid excitation will be an important advance in the safety analysis of steam turbine blades