Bending Vibration Analysis using MBD Technology - Development of Computer Program RotB -
This paper examines a computer program developed to analyze the vibration of rotating machineries based on theories of vibration and multibody dynamics (MBD).Bending vibration problems of rotating machineries have generally been categorized as either linear or nonlinear.Linear problems can be formulated by standard methods, which have been employed in the rotor dynamics research community and nonlinear problems can be formulated by MBD methods.In our study, nonlinear problems are treated by the use of a general-purpose computer program, RecurDyn (RD).For nonlinear problems, when the types of analyses are specified, the operation procedures can be automated.RD has many calculation modules, like subroutines, which treat specific functions.In developing the program for nonlinear analysis, the authors set different individual modules in proper order, depending on the types of analysis, to match the target analyses and used Process Net (PNet).In the program we developed, RotB (rotor bending vibration analysis), structural properties such as shafts, rotating rotary disks, unbalanced masses and foundation structures are modeled as multibody elements.Also, nonlinearities such as contact, non-symmetrical shaft effects, bearing characteristics, nonlinear restoring and damping characteristics in the bearings are taken into account.The program covers (1) seismic response analysis of a rotor system, (2) oil whip analysis, (3) contact analysis of rotors with outer casing, (4) nonlinear spring and damping support analysis in addition to linear eigenvalue and frequency response analysis.The developed computer software has been tested with typical examples that are frequently seen in rotating machineries.The computational results demonstrate the validity of RotB.
Nobuyuki Shimizu Hideyuki Tsukui Takeshi Fujikawa
Mechanical Systems and Design Eng.Iwaki Meisei UniversityIwaki,Fukushima,970-8551,Japan Engineering SectionMotionLabo,Inc.Iwaki,Fukushima,970-8551,Japan Business Administration Education Ashiya University Ashiya,Hyogo,659-8511,Japan
国际会议
上海
英文
1-8
2012-08-26（万方平台首次上网日期，不代表论文的发表时间）