By Prof. Yukio Ishida, Prof. Toshio Yamamoto(auth.)
This moment version with approximately 25% up to date and new content material bargains wide-ranging insurance of basic rotordynamics as a way to offer engineers with the required wisdom to put off a variety of vibration difficulties.
The authors supply a class of rotating shaft structures and common assurance of key principles universal to all branches of rotordynamics. additionally they supply a distinct research of dynamical difficulties, corresponding to nonlinear rotordynamics, self-excited vibration, nonstationary vibration, and flow-induced oscillations. Nonlinear resonances are mentioned intimately, in addition to equipment for shaft balance and diverse theoretical derivations and computational tools for examining rotors to figure out and proper vibrations. New to this variation are case reviews and difficulties, in addition to issues of excessive importance:
- a variety of equipment of vibration suppression
- a brand new bankruptcy on magnetic bearings offering basic wisdom and permitting readers to gain easy magnetic bearings through hand within the laboratory.Content:
Chapter 1 creation (pages 1–10):
Chapter 2 Vibrations of Massless Shafts with inflexible Disks (pages 11–48):
Chapter three Vibrations of a continual Rotor (pages 49–65):
Chapter four Balancing (pages 67–92):
Chapter five Vibrations of an Asymmetrical Shaft and an Asymmetrical Rotor (pages 93–113):
Chapter 6 Nonlinear Vibrations (pages 115–159):
Chapter 7 Self?Excited Vibrations as a result of inner Damping (pages 161–176):
Chapter eight Nonstationary Vibrations in the course of Passage via severe Speeds (pages 177–197):
Chapter nine Vibrations because of Mechanical parts (pages 199–233):
Chapter 10 Flow?Induced Vibrations (pages 235–261):
Chapter eleven Vibration Suppression (pages 263–281):
Chapter 12 a few sensible Rotor structures (pages 283–306):
Chapter thirteen Cracked Rotors (pages 307–325):
Chapter 14 Finite aspect procedure (pages 327–350):
Chapter 15 move Matrix process (pages 351–371):
Chapter sixteen dimension and sign Processing (pages 373–391):
Chapter 17 energetic Magnetic Bearing (pages 393–408):
Read Online or Download Linear and Nonlinear Rotordynamics: A Modern Treatment with Applications, Second Edition PDF
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Additional resources for Linear and Nonlinear Rotordynamics: A Modern Treatment with Applications, Second Edition
Example text
20 shows a vertical rotor system in which a disk is mounted on a massless elastic shaft. As the disk position is not at the center of the shaft, the lateral motion and the inclination motion couple with each other. This rotor has eccentricity e and skew angle τ . The rectangular coordinate system O-xyz, whose z-axis coincides with the bearing centerline, is fixed in space. Generally, a rigid body in space has 6 DOF. 20 4 DOF rotor system: (a) rotor system and (b) coordinate system. in the direction of the bearing centerline is fairly small compared to that in the lateral direction), the disk has 4 DOF.
These widely accepted definitions are explained in Chapter 4. 3. Consider a sliced element that is perpendicular to the axis of rotation. This element has the eccentricity. The magnitude and direction of this eccentricity change depending on the position of the element. 4 shows a vertical rotor executing a lateral whirling motion and a coordinate system. For simplicity, it is assumed that the rotor is vertical and the gravity force is not considered. The z-axis of the coordinate system O-xyz coincides with the bearing centerline, which connects the centers of the upper and lower bearings.
1924) Shaft whipping. Gen. Electr. , 27 (3), 169–178. L. (1926) Shaft rubbing. Mech. , 48 (8), 830–832. L. D. (1925) Shaft whirling due to oil action in journal bearings. Gen. Electr. , 28 (7), 559–568. 9 10 1 Introduction Nonami, K. (1985) Vibration control of a rotor by active bearings. Trans. JSME, 31 (470), 2463–2472. (in Japanese). A. (1945) A general method for calculating critical speeds of flexible rotors. J. Appl. , 12 (3), 142–148. M. (1869) On the centrifugal force of rotating shafts.