This paper examines the acceptability of inlet distortion from the angle of to the blade strength
and considers the influence of some inlet distortion patterns on the compressor blades vibration.An analytical moethod is provided.Meanwhile
the exciting forces of the circumferential distortion on the compressor blades and the blade responses to these fores are analyzed.The blade vibratory stresses caused by the distortion are calculated.The stress variation at different distortion levels is also investigated
and so the inlet distortion tollerance limit determined by the blade strength is discussed.