Data processing: structural design – modeling – simulation – and em – Structural design
Reexamination Certificate
2011-04-12
2011-04-12
Jacob, Mary C (Department: 2123)
Data processing: structural design, modeling, simulation, and em
Structural design
C702S033000
Reexamination Certificate
active
07925475
ABSTRACT:
A computer-performed method of designing a structure. User-selected design parameters are input to a parametric model of the structure. Boundary conditions and load conditions are applied to the model to determine a response of the structure to the conditions. Based on the load conditions, an analysis method is selected. The modeled response is analyzed using the selected analysis method to obtain power spectral density (PSD) values for the model. The PSD values are averaged over a user-selected frequency range to evaluate the design parameters for acoustic transmission loss. This method provides a high degree of flexibility in formulating structural design analyses.
REFERENCES:
patent: 5767406 (1998-06-01), Hu
patent: 5940788 (1999-08-01), Morman et al.
patent: 6090147 (2000-07-01), Bremner et al.
patent: 6363789 (2002-04-01), Rassaian et al.
patent: 6704664 (2004-03-01), Su et al.
patent: 6763310 (2004-07-01), Lafleur et al.
patent: 7120544 (2006-10-01), Duncan
patent: 2003/0114995 (2003-06-01), Su et al.
patent: 2007/0100565 (2007-05-01), Gosse et al.
Cunningham et al, “Dynamic Response of Doubly Excited Curved Honeycomb Sandwich Panels to Random Acoustic Excitation. Part 2: Theoretical Study”, Journal of Sound and Vibration 264, pp. 605-637, 2003.
Allen et al, “Integration of Finite Element and Boundary Element Methods for Calculating the Radiated Sound from a Randomly Excited Structure”, Computers and Structures 77, pp. 155-169, 2000.
Birgersson et al, “Application of the Spectral Finite Element Method to Turbulent Boundary Layer Induced Vibration of Plates”, Journal of Sound and Vibration, 259(4), pp. 873-891, 203.
Crocker, M. J., “Theoretical and Experimental Response of Panels to Turbulent Boundary Layer Pressure Fluctuations and Separated Flow-Some Preliminary Results”, Wyle Laboratories, Report No. WR 67-8, Jul. 1967.
Gosse, “Strain Invariant Failure Theory: Failure Theory and Methodologies for Implementation,” http://www.compositn.net/Downloads/Presentation%20-%20Modelling%20-%20Boeing.pdf; 16 pages, 2003.
Gosse, “A Damage Functional Methodology for Assessing Post-Damage Initiation Environments in Composite Structure,” American Institute of Aeronautics and Astronautics; pp. 1-5; Apr. 2004.
Tay, et al., Damage progression by the element-failure method (EFM) and strain invariant failure theory (SIFT); Composites Science and Technology, vol. 65, pp. 935-944; 2004.
Li, et al., “Application of a First Invariant Strain Criterion for Matrix Failure in Composite Materials,” Journal of Composite Materials, vol. 37, No. 22, pp. 1977-2000; Apr. 2003.
Tsai, et al., “Methodology for Composite Durability Assessment,” SAMPE Technical Conference, Dayton, Ohio; Sep. 2003.
Barlow, “Optimal Stress Locations in Finite Element Models,” International Journal for Numerical Methods in Engineering, vol. 10, pp. 243-251; 1976.
Barlow, “More on Optimal Stress Points—Reduced Integration, Element Distortions and Error Estimation,” International Journal for Numerical Methods in Engineering, vol. 28, No. 7, pp. 1487-1504; Jul. 1989.
Li, et al., “Low-velocity impact-induced damage of continuous fiber-reinforced composite laminates. Part I. An FEM numerical model,” Composites Part A: Applied Science and Manufacturing, vol. 33, No. 8, pp. 1055-1062; Aug. 1, 2002.
Caliskan, “Axial & Lateral Impact Prediction of Composite Structures Using Explicit Finite Element Analysis,” Proceedings of the International Mechanical Engineering Congress and Exposition, pp. 41-49; 2002.
Search Report and Written Opinion for PCT/US2006/043074 dated Mar. 21, 2007.
Tay et al., “Element-Failure: An Alternative to Material Property Degradation Method for Progressive Damage in Composite Structures,” Journal of Composite Materials, vol. 39, No. 18, pp. 1659-1675; Jun. 14, 2005.
Caruthers et al., “A Thermodynamically Consistent, Nonlinear Viscoelastic Approach for Modeling Glassy Polymers,” Polymer, vol. 45, pp. 4577-4597; 2004.
Adolf et al., “Extensive Validation of a Thermodynamically Consistent, Nonlinear Viscoelastic Model for Glassy Polymers,” Polymer, vol. 45, pp. 4599-4621; 2004.
Izhak Bucher, “Parametric Optimization of Structures Under Combined Base Motion Direct Forces and Static Loading”, Transactions of the ASME, vol. 124, Jan. 2002, pp. 132-140.
Michael Allen, Nickolas Vlahopoulos, “Noise generated from a flexible and elastically supported structure subject to turbulent boundary layer flow excitation”, Elsevier, Finite Elements in Analysis and Design 37 (2001); pp. 687-712.
PCT International Search Report and Written Opinion of the International Searching Authority, International application No. PCT/US2007/006523; date of mailing May 23, 2008.
Lee Jung-Chuan
Rassaian Mostafa
Harness & Dickey & Pierce P.L.C.
Jacob Mary C
The Boeing Company
LandOfFree
Analyzing structural design relative to vibrational and/or... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Analyzing structural design relative to vibrational and/or..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Analyzing structural design relative to vibrational and/or... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2738181