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Showing 1 to 20 of 43 for “"NASTRAN"”.
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Maintaining NASTRAN: the politics and technics of aerospace computing
… describes a process of how NASA maintained the NASTRAN (NASA Structural Analysis) computer program. Chapter one addresses my theoretical concern and suggests to learn from both critical theorists and social constructivists. Chapters Two and Three tell the story of NASA and NASTRAN, a computer …
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Modeling Underwater Explosion (UNDEX) Shock Effects for Vulnerability Assessment in Early Stage Ship Design
… directly into the OpenFSI module code in Nastran and used to interface with the structural solver in Nastran to simulate a far-field shockwave impacting the hull. The kick-off velocities and the shock spectra captured in this computationally efficient module is compared to results from a …
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The Engineering Process for the Design of a Motorcycle Chassis and Suspension
… MATLAB, CATIA, HEEDS Professional, and NASTRAN are utilized. Motorcycle Kinematics is used to set up the preliminary motorcycle geometry, and MATLAB is a used to analyze the kinematics and stability of the motorcycle based on this geometry. CATIA (Computer Aided Three-Dimensional …
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Validation and Uncertainty Quantification of Doublet Lattice Flight Loads using Flight Test Data
… loads. The flight loads are computed using a Nastran doublet lattice model and are validated using measured data from a flight loads survey for a Cessna Model 525B business jet equipped with Tamarack® Aerospace Group’s active winglet modification, ATLAS® (Active Technology Load Alleviation …
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Analysis Methodology Determination For Calculating Load Distributions of Complex Fastened Joints
… proven Finite Element Analysis (FEA) processor NASTRAN, and 4) BoltJoint10, an FEA method created for the helicopter industry specifically for fastened joints. A basic lap-splice fastened joint was used as the baseline to determine which analysis methodology will provide accurate load …
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Response of Isotropic and Laminated Plates to Close Proximity Blast Loads
… modeled using the commercial finite element code NASTRAN and the method of modal superposition. Both analysis procedures are used to quantify the linear transient response of such plates subject to uniform and patch blast loads. Furthermore, NASTRAN is used to study the nonlinear response of …
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Toward a full aircraft model platform for fuel slosh-structure interaction simulations
… and processes. The developed code reads in MSC Nastran data, from which Hermitian finite element discretisation is performed followed by transient calculations. To this end, the structure was represented by Timoshenko beam theory. The structural ROM was validated and verified against the widely …
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Design Optimization of a Composite Wing Box for High-Altitude Long-Endurance Aircraft
… design procedure is described which uses a NASTRAN-based Finite Element Analysis (FEA), and the Hierarchical Evolutionary Engineering Design System (HEEDS) MDO software to define a locus of acceptable, optimized wing box design definitions.</p>
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Développement par éléments finis de la région active d'une structure intelligente multi-couches
… de cette approche thermique dans MSC/NASTRAN a été proposée afin de permettre l'analyse de structures complexes comportant des actionneurs piézo-électriques. En second lieu, un code d'éléments finis tri-dimensionnel piézo-électrique a été développé sur MATLAB afin de valider …
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Structural-Electromagnetic Simulation Coupling and Conformal Antenna Design Tool
… software packages ADT is optimized for are MSC NASTRAN and ANSYS HFSS. Specifically, ADT is designed to generate a deformed 3D Computer Aided Design (CAD) model from a NASTRAN structural mesh. The resulting CAD model is compatible with HFSS electromagnetic simulation software for the assessment …
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Effect of Thermally Induced Deformation in a Supersonic Combustion Facility
<p>Nastran and ANSYS finite element analysis (FEA) and Wind-US computational fluid dynamics (CFD) solvers are used to simulate the effect of thermal deformation on the reacting flow developing within the University of Virginia (UVa) Supersonic Combustion Facility (SCF). A detailed …
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Effect of Fatigue Cycle Loading Amplitude Tension-Tension on Composite Laminated Plates with Initial Delamination
… comparison with numerical analysis models using Nastran/Patran software .</p> <p>The laminate composite plates were fabricated with woven prepreg carbon fiber with an initial delamination and tested under tensile and constant amplitude cycle loading. The tensile characteristics of the laminated …
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Vibration Analysis of a Wind Turbine Multi-Stage Planetary Gearbox Incorporating a Flexible Body Component
… dynamic analysis program, and MSC Patran/Nastran, a finite element analysis software, and its associated solver. The model is created to show the vibration patterns of a healthy gearbox with rigid bodies, with a flexible body, and with a defect applied on a particular gear in the planetary …
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Design, Simulation, and Wind Tunnel Verication of a Morphing Airfoil
… with the commercial finite element package NX Nastran. Placement of the piezoelectric actuator is studied for optimal effectiveness. A thermal analogy is used to represent piezoelectric strain. Lift and drag coefficients in low Reynolds number flow are explored with XFOIL. Predictions are made …
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Optimization of composite carriage for a coordinate measurement machine
… built and mounted on the machine to be tested. A NASTRAN finite element model of the composite component is created to analyze more accurately the behavior of the composite structure. Structural optimization is next performed to seek minimum weight and maximum stiffness designs of the structural …
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Inverse Problems in Structural Mechanics
… weight of the patient are calculated using MSC/NASTRAN for a given body pressure. The deformation of the fiber optic cable can be extracted from the deformation of the mattress. The performance of the fiber optic sensor for any given placement is further calculated for any given perturbation. …
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Experimental and Computational Analysis of a 3D Printed Wing Structure
… is compared against the commercial software Nastran/Patran. Further plans include experimental aerodynamic test of 3D printed wing in the new Embry-Riddle Aeronautical University’s (ERAU) wind tunnel to validate the proposed model.</p>
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Flexural-Torsional Coupled Vibration of Rotating Beams Using Orthogonal Polynomials
… references and with those obtained using NASTRAN finite element package.
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Review of Methods for Calculating Pressure Profiles of Explosive Air Blast and its Sample Application
… with a commercial finite element code (NASTRAN) in a demonstration of method on a 30 by 30 inch aluminum 2519 quarter plate of fixed boundary conditions in hemispherical ground burst and showed good convergence with 256 elements for deflection and good agreement in equivalent stresses of …
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Analysis of After Impact Characteristics and Structural Optimization of CFRP Composite Plate
… the modified model was created in MSC. PATRAN/NASTRAN to optimize the ply thickness, ply orientation, and dimensional properties of the plate to minimize the weight while abiding by the structural response constraints. Moreover, the possibility of the OpenMDAO framework in nonlinear dynamic …
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