Geometric Modeling for Computer Aided Design
نویسنده
چکیده
SMART, Solid Modeling Aerospace Research Tool, isthe Vehicle AnalysisBranch of NASA Langley Research Center's computer-aided design tool used in aerospace vehicledesign. Modeling of structuralcomponents using SMART includes the representationof the transverseor cross-wiseelements of a vehicle'sfuselage,ringframes and bulkheads. Ringframes are placed along a vehicle'sfuselage to provide structuralsupport and maintain the shape of the fuselage. Bulkheads are also used to maintain shape but are placed at locationswhere substantialstructuralsupport isrequired. Given a Bdzier curve representationof a cross-sectionalcut through a vehicle'sfuselageand/or an interiortank, thisproject produces a frrst-guess Bd'zierpatch representationof a ringframe or bulkhead at the cross-sectional position.The grid produced islaterused in the structuralanalysisof the vehicle.The graphical display of the generated patches allows the user to edit patch controlpointsin realtime. Constraintsconsidered in the patch generationinclude maintaining %quare-like_ patches and placement of longitudinal, or lengthwise along the fuselage,structuralelements calledlongerons.
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تاریخ انتشار 1993