Data processing: structural design – modeling – simulation – and em – Simulating nonelectrical device or system
Reexamination Certificate
2004-05-26
2009-12-08
Shah, Kamini S (Department: 2128)
Data processing: structural design, modeling, simulation, and em
Simulating nonelectrical device or system
C703S002000, C703S013000
Reexamination Certificate
active
07630869
ABSTRACT:
A method is disclosed for analyzing the vibrational characteristics of rotating devices, such as hard disk drives and jet engines, that are coupled through bearings to flexible supports. In the method, the rotating device is discretized, for example, using a mesh suitable for finite element analysis. The support is also discretized. The natural frequency of elastic vibration modes for the rotating device is calculated and the natural frequency of vibration modes for the support is calculated. The mode shapes are then calculated and a set of modal basis corresponding to the mode shapes is utilized. Bearing stiffness and damping matrices are input, and the Lagrangian equations of motion are integrated numerically in the modal space, to calculate the vibrational response of the rotating device and support. The modal space results are then transformed into ordinary space. The vibrational analysis may be used to design devices having desired vibrational characteristics.
REFERENCES:
patent: 5163015 (1992-11-01), Yokota
patent: 6101453 (2000-08-01), Suwa et al.
patent: 6453729 (2002-09-01), Muto et al.
patent: 6542859 (2003-04-01), Burns et al.
patent: 6658358 (2003-12-01), Hao et al.
patent: 6668234 (2003-12-01), DiTommaso et al.
patent: 6684168 (2004-01-01), Kawamoto et al.
patent: 6694816 (2004-02-01), Matsuoka
patent: 6704639 (2004-03-01), Amano
patent: 6708142 (2004-03-01), Baillot et al.
patent: 6834393 (2004-12-01), Akimaru et al.
Fawzi M.A. El-Saeidy, “Finite Element Modeling of a Rotor Shaft Rolling Bearings System With Consideration of Bearing Nonlinearities”, Journal of Vibration and Control, vol. 4, No. 5, 541-602 (1998).
El-Saeidy, “Finite-Element Dynamic Analysis of a Rotating Shaft with or without Nonlinear Boundary Conditions Subject to a Moving Load”, Nonlinear Dynamics 21: 377-408, 2000.
Jintanawan, Thitima, “Vibration of Rotating Disk-Spindle Systems with Hydrodynamic Bearings”, Univ. Washington, 2000.
Shen, I. Y. (Steve) Shen, Resume, Rev Jan. 3, 2005, http://www.me.washington.edu/people/faculty/shen/cv.pdf.
G. H. Jang, S. H. Lee, M. S. Jung, Free Vibration Analysis of a Spinning Flexible Disk-Spindle System Supported by Ball Bearing and Flexible Shaft Using the Finite Element Method and Substructure Synthesis, Journal of Sound and Vibration, vol. 251, Issue 1, Mar. 14, 2002, pp. 59-78.
Bittner, H., and I.Y. Shen, “Taming Disk/Spindle Vibrations Through Aerodynamic Bearings and Acoustically Tuned-Mass Dampers,” Institute of Electrical and Electronics Engineers, Inc., IEEE Transactions on Magnetics 35(2):827-832, 1999.
Deeyiengyang, S., and K. Ono, “Analysis of Ball-Bearing Vibrations of Hard Disk Spindles,” Journal of Information Storage and Processing Systems 3:89-99, 2001.
Deeyiengyang, S., and K. Ono, “Suppression of Resonance Amplitude of Disk Vibrations by Squeeze Air Bearing Plate,” Institute of Electrical and Electronics Engineers, Inc., IEEE Transactions on Magnetics 37(2):820-825, 2001.
Frees, G.M., “Disk Drive Spindle Dynamics—Analysis and Measurement,” Advances in Information Storage Systems 6:237-262, 1995.
Heo, B., and I.Y. Shen, “A Parametric Study on Rocking Vibration of Hard Disk Drive Spindle Motors With Fluid-Dynamic Bearings and Rotating-Shaft Design,” Microsystem Technologies 11(11):1204-1213, 2005.
Heo, B., et al., “Identifying Damping of a Gyroscopic System Through the Half-Power Method and Its Applications to Rotating Disk/Spindle Systems,” American Society of Mechanical Engineers (ASME), Journal of Vibration and Acoustics 121:70-77, 1999.
Heo, B., et al., “Reducing Disk Flutter by Improving Aerodynamic Design of Base Castings,” Institute of Electrical and Electronics Engineers, Inc., IEEE Transactions on Magnetics 36(5):2222-2224, 2000.
Heo, B., et al., “Taming Disk and Spindle Rocking by Damped Laminated Disks—An Experimental Study,” Institute of Electrical and Electronics Engineers, Inc., IEEE Transactions on Magnetics 35(5):2304-2306, 1999.
Hsu, Y.-C., and I.Y. Shen, “Constrained Layer Damping Treatments for Microstructures,” American Society of Mechanical Engineers (ASME), Journal of Vibration and Acoustics 124:612-616, 2002.
Hsu, Y.-C., et al., “Demonstration and Characterization of PZT Thin-Film Sensors and Actuators for Meso- and Micro-Structures,” Sensors and Actuators A: Physical 116(3):369-377, 2004.
Huang, P.Y.H., et al., “A Comment on Boundary Conditions in the Modeling of Beams With Constrained Layer Damping Treatments,” American Society of Mechanical Engineers (ASME), Journal of Vibration and Acoustics 123:280-284, 2001.
Huang, P.Y.H., et al., “Thickness Deformation of Constrained Layer Damping: An Experimental and Theoretical Evaluation,” American Society of Mechanical Engineers (ASME), Journal of Vibration and Acoustics 123:213-221, 2001.
Huang, P.Y.H., et al., “Use of Microcellular Foam Materials in Constrained Layer Damping Treatments,” Cellular Polymers 20(2):101-114, 2001.
Jeung, Y.S., and I.Y. Shen, “Development of Isoparametric, Degenerate Constrained Layer Element for Plate and Shell Structures,” American Institute of Aeronautics and Astronautics, Inc., AIAA Journal 39(10):1997-2005, 2001.
Jia, H.S., “On the Bending Coupled Natural Frequencies of a Spinning, Multispan Timoshenko Shaft Carrying Elastic Disks,” Journal of Sound and Vibration 221(4):623-649, 1999.
Jintanawan, T., and I.Y. Shen, “Free Vibration of a Rotating Disk Pack and Spindle Motor System With a Rotating-Shaft Design,” Journal of Information Storage and Processing Systems 2:129-139, 2000.
Jintanawan, T., et al., “Free and Forced Vibrations of a Rotating Disk Pack and Spindle Motor System With Hydrodynamic Bearings,” Journal of Information Storage and Processing Systems 1:45-58, 1999.
Jintanawan, T., et al., “Vibration Analysis of Fluid Dynamic Bearing Spindles With Rotating-Shaft Design,” Institute of Electrical and Electronics Engineers, Inc., IEEE Transactions on Magnetics 37(2):799-804, 2001.
Ku, C.-P.R., and I.Y. Shen, “Effect of Disk Flexibility on Rocking Mode Frequencies of a Disk Drive Spindle Motor System,” Society of Tribologists and Lubrication Engineers (STLE) and American Society of Mechanical Engineers (ASME) Tribology Conference, Kissimmee, Florida, Oct. 8-11, 1995.
Kuo, D., et al., “Mechanical-Performance of Laminated Discs,” Institute of Electrical and Electronics Engineers, Inc., IEEE Transactions on Magnetics 36(1):166-170, 2000.
Lee, C.-W., and J.-S. Ham, “Mode Identification for Rotating Rigid Shaft With Flexible Disks by Mode Splits,” Journal of Sound and Vibration 225(3):425-446, 1999.
Lee, C.-W., and S.-B. Chun, “Vibration Analysis of a Rotor With Multiple Flexible Disks Using Assumed Modes Method,” American Society of Mechanical Engineers (ASME), Journal of Vibration and Acoustics 120:87-94, 1998.
Lim, S., “Finite Element Analysis of Flexural Vibrations in Hard Disk Drive Spindle Systems,” Journal of Sound and Vibration 233(4):601-616, 2000.
Ou-Yang, J.-H., et al., “Experimental and Theoretical Studies of PZT Glide Head Vibration,” Institute of Electrical and Electronics Engineers, Inc., IEEE Transactions on Magnetics 35(5):2493-2495, 1999.
Ou-Yang, J.-H., et al., “Forced Response of PZT Glide Heads,” American Society of Mechanical Engineers (ASME), Journal of Tribology 122:780-786, 2000.
Park, J.S., and I.Y. Shen, “Aerodynamically and Structurally Coupled Vibration of Multiple Co-Rotating Disks,” American Society of Mechanical Engineers (ASME), Journal of Vibration and Acoustics 126:220-228, 2004.
Park, J.S., et al., “A Parametric Study on Rocking Vibration of Rotating Disk/Spindle Systems With Hydrodynamic Bearings: Rotating-Shaft Design,” Microsystem Technologies 8:427-434, 2002.
Park, J.S., et al
Shen I-Yeu
Shen Jr-Yi
Tseng Chaw-Wu
Christensen O'Connor Johnson & Kindness PLLC
Shah Kamini S
Silver David
University of Washington
LandOfFree
Method for predicting vibrational characteristics of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for predicting vibrational characteristics of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for predicting vibrational characteristics of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4080593