The shaft manufacturing bending deviation occurs frequently in many types of shaft applications, such as crank shaft and\nroller shaft, and this issue will eventually affect the overall dynamic performance of the rotorââ?¬â??shaft-bearing system. In\nthis study, a systematic modeling approach is developed to analyze the effect of shaft manufacturing bending deviation on\nthe dynamic behavior of the geared rotor system. To validate the proposed approach, a practical example of spur geared\nrotor system was used and the shaft manufacturing bending deviation data were measured by a shaft testing bench. The\nwhole system was modeled using a finite element method and the dynamic characteristics of meshing gear pair were\nrepresented by a coupled torsionalââ?¬â??lateral gear dynamic model. Then, the effects of the dynamic gear mesh force, magnitude\nof deviation, position of deviation, and rotating speed on the dynamic responses of the geared rotor system were\nevaluated. The calculation results show that these parameters have different effects on the systematic vibration response\nof the geared rotor system, indicating that the geared rotor system has different dynamic sensitivities to those different\nexcitations. This study helps to get a better understanding of the dynamic behavior of the geared rotor system with shaft\nbending deviation and can provide guidance for quality control of shaft manufacturing process in view of system\ndynamics.
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