Reduced-Order Models of Bladed Disks and Vane with Mistuning and Frictionally Constrained Ring Damper.

[摘要] High performance bladed disks used in turbomachines have to meet strictstandards in terms of aeroelastic stability and high-cycle fatigue. One structuralcharacteristic of bladed disks which can signifficantly impact compliance withthese standards is mistuning, namely small structural variability from blade toblade. To predict the effects of mistuning, computationally efficient methodsare needed to enable free and forced-response analyses of full-assembly finiteelement models for both research and realistic industrial-size studies. Due tothe size and complexity of typical industrial bladed disk models, one must resortto robust and systematic reduction techniques to create computationally fastreduced-order models of sufficient accuracy.The main goal of this research is to develop a framework for efficient yetaccurate linear and nonlinear vibration analysis of bladed disk systems withfriction interfaces and structural or geometrical variations. The main componentof the solution technique for predicting the nonlinear vibration response is basedon novel reduced-order models (ROMs).

[发布机构] University of Michigan

[效力级别] Mechanical Engineering

[关键词] Reduced order modelings of turbine blade mistuning;Mechanical Engineering;Engineering;Mechanical Engineering