Papers

• Vidyasagar, S., Bhatia, S, Fogt, V., Majed, A., and Henkel, E., “Accurate Determination of the Impact of Interface Deadband Nonlinearities on Component Transient Environments,” 2010 AIAA Symposium.
• Bhatia, S, et. al., “Accurate Determination of Transient Flight Loads for Foam Packed Payloads,” 2010 Spacecraft & Launch Vehicle Dynamic Environments Workshop.
• Vidyasagar, S., Bhatia, S, Fogt, V., Majed, A., and Henkel, E., “Accurate Determination of the Impact of Interface Deadband Nonlinearities on Component Transient Environments,” 2010 Spacecraft & Launch Vehicle Dynamic Environments Workshop.
• Majed, A. and Henkel, E. E., “A Generalized Method of Random Vibration Mass Attenuation,” NESC Vibroacoustics Best Practices Group, October 2009.
• Majed, A. and Henkel, E. E., “Component Effective Modal Mass: Defining Components’ Contribution to Overall Assembled System Effective Modal Mass,” Spacecraft and Launch Vehicle Dynamics Workshop, JPL, June 2005.
• Majed, A. and Henkel, E. E., “Calculating Booster to Launch Pad Transient Forces with Coupled Longitudinal/Lateral Force Decay,” 46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, April 2005.
• Majed, A., “Proposed ‘Mass-Loaded’ Residual Vector Concept: Preliminary Draft,” Nov. 4, 2004.
• Majed, A. and Henkel, E. E., and Wilson, C. “Improved Mixed-Boundary Component Mode Representation for Structural Dynamic Analysis,” MSC Software Virtual Product Development Conference, Paper MSC-VPD-2004-65, Huntington Beach, CA, October 2004.
• Majed, A., et. al., “Impact of Component Parameter Uncertainties on Coupled Loads Analysis Results - An Application of Enigma’s Variational Coupled Loads Analysis Capability,” Spacecraft and Launch Vehicle Dynamics Workshop, JPL, June 2004.
• Majed, A. and Henkel, E. E., “Improved Mixed-Boundary Component Mode Representation for Structural Dynamic Analysis,” Spacecraft and Launch Vehicle Dynamics Workshop, JPL, June 2004.
• Majed, A. and Henkel, E. E., “Structural-Borne Random Vibrations: ASD’s Finite Energy Approach for Cargo Integration Analyses,” May 2004.
• Majed, A., Partin, K. S., Henkel, E. E., and Sarafin, T. P., “Variational Coupled Loads Analyses: Reducing Risk in the Development of Space-Flight Hardware,” SDM/ASC/NDA/GSF Conference, Paper AIAA-2004-1798, April 2004.
• Majed, A. and Henkel, E. E., “Impact of PFAP/ICC Joint Deadbands on Worst Case Linear Transient Loads Envelopes - An Application of Enigma’s Nonlinear Transient Coupled Loads Analysis Capability,” Space Shuttle Program Structures Technical Interchange Meeting, NASA-JSC, April 2004.
• Majed, A., et. al., “Impact of Component Parameter Uncertainties on Coupled Loads Analysis Results - An Application of Enigma’s Variational Coupled Loads Analysis Capability,” Space Shuttle Program Structures Technical Interchange Meeting, NASA-JSC, April 2004.
• Partin, K. S., and Majed, A., “ICC-G Cargo Loads Envelopes Accounting for MPLM Weight Variations - An Application of Enigma’s Variational Coupled Loads Analysis Capability,” Space Shuttle Program Structures Technical Interchange Meeting, NASA-JSC, April 2004.
• Majed, A. and Henkel, E. E., “Improved Mixed-Boundary Component Mode Representation for Structural Dynamic Analysis,” Space Shuttle Program Structures Technical Interchange Meeting, NASA-JSC, April 2004.
• Henkel E. E., and Majed, A., “Back of the Envelope ET Insulation Impact Force Calculations,” February 2003.
• Henkel, E. E., and Majed, A., “GAS Can Isolation Test with Aeroflex Wire Rope Springs Revisited,” Space Shuttle Program Structures Technical Interchange Meeting, NASA-JSC, April 2004.
• Henkel, E. E., “Multibody Analysis of the Temporomandibular Joing Motion,” October 2003.
• Majed, A., “Space Shuttle/Cargo Mission Coupled Loads Risk Analysis: A Rigorous Assessment of Cargo Structural Loads Variations for Launch and Landing,” September 2003.
• Henkel, E. E., “Maintaining Component Native Coordinate Systems in Coupled Analysis,” ASD-WP-03-002, September 2003.
• Majed, A., and Henkel, E. E., “Space Shuttle/Payloads Verification Loads Analysis and Associated Risks,” August 2003.
• Majed, A., and Henkel, E. E., “Impact of Interface Deadbands on Component Transient Environments,” ASD-WP-03-008, August 2003.
• Majed, A., “Nonlinear Coupled Loads Analysis - Effect of Passive FRAM Joint Deadbands,” ASD-WP-03-007, August 2003.
• Partin, K. S., and Henkel, E. E., “Enigma Multibody Loads Analysis - Practical Variational Coupled Loads Analysis for Launch Vehicle/Payloads,” Spacecraft and Launch Vehicle Dynamics Workshop, JPL, June 2003.
• Majed, A., and Henkel E. E., “Orbiter Rubin-MacNeal Residual Flexibility Dynamic Math Model: A Displacement Calculation Problem,” May 7, 2003.
• Majed, A., “Root-Cause and Solution of the “Problem” Verification Loads Analyses involving Full Triple Matrix Product (FTMP) Damping Approach,” May 1, 2003.
• Henkel, E. E., and Majed, A., “Design and Analysis of an Isolated Cross-Bay Carrier for Shuttle Transient and Random Environments,” ASD-WP-03-006, April 2003.
• Henkel, E. E., and Majed, A., “Design and Analysis of a Cargo Isolation System for Shuttle Transient and Random Environments,” ASD-WP-03-005, April 2003.
• Henkel, E. E., and Majed, A., “Trunnion Friction – Implications on Space Shuttle Cargo Element Transient Response,” ASD-WP-03-001, March 2003.
• Majed, A., and Partin, K. S., “Variational Coupled Loads Analysis – Effect of SOLAR and EuTEF Frequency Uncertainty on Design Loads,” ASD-TR-005, April 2003.
• Majed, A., and Partin, K. S., “Variational Coupled Loads Analysis - Complete Characterization of the Integrated Cargo Carrier Dynamics to Shuttle Liftoff and Landing Transients with MPLM Coupling Effects,” ASD-TR-002, March 2003.
• Majed, A., and Partin, K. S., “Variational Coupled Loads Analysis – Dynamics of the Isolated Cargo Transport Container to Shuttle Liftoff and Landing Transients,” ASD-TR-004, December 2002.
• Majed, A., “Methodology for the RAPID1 Coupled Loads Analysis Software Tool,” ASD-WP-02-004, September 2002.
• Majed, A., “Technical Disagreement as to the Validity of the CM1.0A27 Shuttle Liftoff Rubin MacNeal Dynamic Math Model,” ASD-TM-02-005, September 2002.
• Majed, A., and Partin, K. S., “Variational Coupled Loads Analysis – Effect of FHRC and CMG ORU Frequency Uncertainty on Flight Certification Loads,” ASD-TR-001, September 2002.
• Majed, A., and Henkel, E. E., “A Mixed-Boundary Method in Component-Mode Synthesis,” Spacecraft and Launch Vehicle Dynamics Workshop, JPL, June 2002.
• Majed, A., and Henkel, E. E., “A Mixed-Boundary Method in Component-Mode Synthesis,” Space Shuttle Program Structures Technical Interchange Meeting, NASA-JSC, April 2002.
• Majed, A., and Henkel, E. E.. “Residual Flexibility Mixed Boundary CMS,” JPL Conference, 2002.
• Majed, A., et. al., “Proper Treatment of Craig-Bampton Generalized Coordinates in Unit Conversions,” ISMA-TM-01-025, Boeing Co., 2001.
• Majed, A., “Modal Testing and Correlation of the Vertical Cargo Carrier to the Energia Modal Test,” 2001.
• Henkel, E. E., “Space Shuttle Cargo Integration Quasi-static Analysis – A Proposal to Modify the Method from Displacement Driven to Force Driven,” July 2000.
• Henkel, E. E., “Cargo Element to Cargo Element Manifesting Sensitivity Study, MPLM Effects on External Cargo Dynamic Responses,” 2000.
• Henkel, E. E., “Rapid Certification of MPLM and Logistics Hardware Post Verification Loads Analysis Manifest Changes,” 2000.
• Majed, A., “Modal Correlation of the Integrated Cargo Carrier to the IABG Modal Test,” 2000.
• Majed, A., “Modal Correlation of the Unpressurized Cargo Carrier to the Energia Modal Test,” 2000.
• Henkel, E. E., “High-Fidelity Orbiter Math Models and Forcing Functions for Cargo Integration,” Dec. 14, 1999.
• Henkel, E. E., “ZC Orbiter Forcing Function Discrepancies,” Dec. 14, 1999.
• Henkel, E. E., and Majed, A., “Effect on Transient Analyses Due to Physically Unrealizable Damping Coupling Inherent Within the Diagonal System Damping Method,” 1999.
• Henkel, E. E., “Orbiter M6.0ZC Math Model Discrepancies,” 1998.
• Henkel, E. E., “Orbiter M6.0ZC Liftoff Forcing Functions Discrepancies,” 1998.
• Henkel, E. E., “Lessons Learned from the Joint NASA/Industry Design Analysis Methods for VIBrationS (DAMVIBS),” 1995.
• Henkel, E. E., R. A. Hewlett, R. Mar. “A Closed Form Methodology For Solving Differential- Algebraic Equations,” 22nd NASTRAN Users Colloquium, San Diego, (April 26-29 1994).
• Henkel, E. E., “Defining Nominally Constrained Damping in Over Constrained Craig- Bampton Dynamic Math Models,” 1994.
• Henkel, E. E., “Defining Free-Free Damping for Craig-Bampton Dynamic Math Models,” 1994.
• Majed, A., “On the Application of Inertia-Relief Static Corrections in Space Shuttle/ Payloads Verification Loads Analyses; Part 2 – An Alternative, Equivalent Formulation via Inertia-Relief Residual Corrections and Mode-Displacement Method,” SDA-L&D-94-046, Rockwell International, 1994.
• Majed, A., “On the Application of Inertia-Relief Static Corrections in Space Shuttle/ Payloads Verification Loads Analyses,” SDA-L&D-94-045, Rockwell International, 1994.
• Majed, A., et. al., “Anomalous Computation of the Junction Forces Resulting from Inconsistent Acceleration Recovery When Using the NASTRAN Nonlinear Modified Newmark Coupled Integrator,” SDA-L&D-94-002, Rockwell International, 1994.
• Majed, A., and Henkel E. E., “Bi-linear Interface Spring Effects on Transients for Mir Solar Array Assembly,” Rockwell International, 1994.
• Henkel, E. E., and Mar, R., “Transient Solution of Coupled Structural Components Using System Modal Coordinates With and Without Coupled System Damping,” Proceedings of Damping ‘93, San Francisco (June 1993).
• Henkel, E. E., “Parametric Study for Load Alleviation of Cantilevered Cargo Dynamic Response via a Forward Reaction Element,” 1993.
• Henkel, E. E.. “Proper Definition of Component Damping Relative to the STS-49 ASEM Payload Full Triple Matrix Product Anomaly,” 1993.
• Henkel, E. E., “Closed Form Solution of Equations of Motion With Coupled Damping Matrix,” 1992.
• Majed, A., “An Improvement to Bamford’s Modal Synthesis,” Notes for CMS Technical Briefing, 1989, Rockwell International, Downey, CA.
• Henkel, E. E., “Centaur G Twang Test Z Loading – Effect of Gapping at Orbiter Interface,” Rockwell International Report, 1986.