Computer analysis of a rotating axial-turbomachine blade in coupled bending-bending-torsion vibrations

摘要: Basic equations are derived for a comprehensive computer analysis an equivalent lumped parameter system which simulates pre-twisted, rotating or non-rotating. Timoshenko beam in coupled bending-bending-torsion vibrations. These enable one to develop straightforwardly digital programs studying vibration problems related compressor turbine blades turbomachinery as well other structural dynamics applications. The validity of the approach is established through free study. Good agreement between present results and those obtained theoretically experimentally by investigators demonstrated. In particular, it found that natural frequencies study all beams examined converge from below exact values at convergence rate N−4, where N total number parameters used simulation. rapid shows mathematical model deriving basic can adequately represent type under consideration. known also provides estimate on accuracy results, means improve these extrapolation.