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OpenVSP
OpenVSP, also known as Open Vehicle Sketch Pad, is an open source parametric aircraft geometry tool originally developed by NASA. It can be used to create 3D models of aircraft and to support engineering analysis of those models. Predecessors to OpenVSP including VSP and Rapid Aircraft Modeler (RAM) were developed by J.R. Gloudemans and others for NASA beginning in the early 1990s. OpenVSP v2.0 was released as open source under the NOSA license in January 2012. Development has been led by Rob McDonald since around 2012 and has been supported by NASA and AFRL among other contributions. OpenVSP allows the user to quickly generate computer models from ideas, which can then be analyzed. As such, it is especially powerful in generating and evaluating unconventional design concepts. Features User interface OpenVSP displays a graphical user interface upon launch. A workspace window and a "Geometry Browser" window open. The workspace is where the model is displayed while the Geometry ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OpenVSP Geometries
OpenVSP, also known as Open Vehicle Sketch Pad, is an open source parametric aircraft geometry tool originally developed by NASA. It can be used to create 3D models of aircraft and to support engineering analysis of those models. Predecessors to OpenVSP including VSP and Rapid Aircraft Modeler (RAM) were developed by J.R. Gloudemans and others for NASA beginning in the early 1990s. OpenVSP v2.0 was released as open source under the NOSA license in January 2012. Development has been led by Rob McDonald since around 2012 and has been supported by NASA and AFRL among other contributions. OpenVSP allows the user to quickly generate computer models from ideas, which can then be analyzed. As such, it is especially powerful in generating and evaluating unconventional design concepts. Features User interface OpenVSP displays a graphical user interface upon launch. A workspace window and a "Geometry Browser" window open. The workspace is where the model is displayed while the Geom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OpenVSP VSPAERO
OpenVSP, also known as Open Vehicle Sketch Pad, is an open source parametric aircraft geometry tool originally developed by NASA. It can be used to create 3D models of aircraft and to support engineering analysis of those models. Predecessors to OpenVSP including VSP and Rapid Aircraft Modeler (RAM) were developed by J.R. Gloudemans and others for NASA beginning in the early 1990s. OpenVSP v2.0 was released as open source under the NOSA license in January 2012. Development has been led by Rob McDonald since around 2012 and has been supported by NASA and AFRL among other contributions. OpenVSP allows the user to quickly generate computer models from ideas, which can then be analyzed. As such, it is especially powerful in generating and evaluating unconventional design concepts. Features User interface OpenVSP displays a graphical user interface upon launch. A workspace window and a "Geometry Browser" window open. The workspace is where the model is displayed while the Geom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OpenVSP CompGeom
OpenVSP, also known as Open Vehicle Sketch Pad, is an open source parametric aircraft geometry tool originally developed by NASA. It can be used to create 3D models of aircraft and to support engineering analysis of those models. Predecessors to OpenVSP including VSP and Rapid Aircraft Modeler (RAM) were developed by J.R. Gloudemans and others for NASA beginning in the early 1990s. OpenVSP v2.0 was released as open source under the NOSA license in January 2012. Development has been led by Rob McDonald since around 2012 and has been supported by NASA and AFRL among other contributions. OpenVSP allows the user to quickly generate computer models from ideas, which can then be analyzed. As such, it is especially powerful in generating and evaluating unconventional design concepts. Features User interface OpenVSP displays a graphical user interface upon launch. A workspace window and a "Geometry Browser" window open. The workspace is where the model is displayed while the Geom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NASA
The National Aeronautics and Space Administration (NASA ) is an independent agency of the US federal government responsible for the civil space program, aeronautics research, and space research. NASA was established in 1958, succeeding the National Advisory Committee for Aeronautics (NACA), to give the U.S. space development effort a distinctly civilian orientation, emphasizing peaceful applications in space science. NASA has since led most American space exploration, including Project Mercury, Project Gemini, the 1968-1972 Apollo Moon landing missions, the Skylab space station, and the Space Shuttle. NASA supports the International Space Station and oversees the development of the Orion spacecraft and the Space Launch System for the crewed lunar Artemis program, Commercial Crew spacecraft, and the planned Lunar Gateway space station. The agency is also responsible for the Launch Services Program, which provides oversight of launch operations and countdown management f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computational Fluid Dynamics
Computational fluid dynamics (CFD) is a branch of fluid mechanics that uses numerical analysis and data structures to analyze and solve problems that involve fluid flows. Computers are used to perform the calculations required to simulate the free-stream flow of the fluid, and the interaction of the fluid ( liquids and gases) with surfaces defined by boundary conditions. With high-speed supercomputers, better solutions can be achieved, and are often required to solve the largest and most complex problems. Ongoing research yields software that improves the accuracy and speed of complex simulation scenarios such as transonic or turbulent flows. Initial validation of such software is typically performed using experimental apparatus such as wind tunnels. In addition, previously performed analytical or empirical analysis of a particular problem can be used for comparison. A final validation is often performed using full-scale testing, such as flight tests. CFD is applied to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AutoCAD DXF
AutoCAD DXF (Drawing Interchange Format, or Drawing Exchange Format) is a CAD data file format developed by Autodesk for enabling data interoperability between AutoCAD and other programs. DXF was introduced in December 1982 as part of AutoCAD 1.0, and was intended to provide an exact representation of the data in the AutoCAD native file format, DWG (Drawing). For many years, Autodesk did not publish specifications, making correct imports of DXF files difficult. Autodesk now publishes thDXF specifications online Versions of AutoCAD from Release 10 (October 1988) and up support both ASCII and binary forms of DXF. Earlier versions support only ASCII. As AutoCAD has become more powerful, supporting more complex object types, DXF has become less useful. Certain object types, including ACIS solids and regions, are not documented. Other object types, including AutoCAD 2006's dynamic blocks, and all of the objects specific to the vertical market versions of AutoCAD, are partially ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Object File
An object file is a computer file containing object code, that is, machine code output of an assembler or compiler. The object code is usually relocatable, and not usually directly executable. There are various formats for object files, and the same machine code can be packaged in different object file formats. An object file may also work like a shared library. In addition to the object code itself, object files may contain metadata used for linking or debugging, including: information to resolve symbolic cross-references between different modules, relocation information, stack unwinding information, comments, program symbols, debugging or profiling information. Other metadata may include the date and time of compilation, the compiler name and version, and other identifying information. The term "object program" dates from at least the 1950s: A computer programmer generates object code with a compiler or assembler. For example, under Linux, the GNU Compiler Collection com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IGES
The Initial Graphics Exchange Specification (IGES) is a vendor-neutral file format that allows the digital exchange of information among computer-aided design (CAD) systems. It's an ASCII-based textual format. The official title of IGES is ''Digital Representation for Communication of Product Definition Data'', first published in March, 1980 by the U.S. National Bureau of Standards as NBSIR 80-1978. Many documents (like early versions of the Defense Standards MIL-PRF-28000 and MIL-STD-1840) referred to it as ASME Y14.26M, the designation of the ANSI committee that approved IGES Version 1.0. Using IGES, a CAD user can exchange product data models in the form of circuit diagrams, wireframe, freeform surface or solid modeling representations. Applications supported by IGES include traditional engineering drawings, models for analysis, and other manufacturing functions. History IGES was an initiative of the United States Air Force (USAF) Integrated Computer Aided Manufacturing (IC ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ISO 10303-21
STEP-File is a widely used data exchange form of STEP. ISO 10303 can represent 3D objects in Computer-aided design (CAD) and related information. Due to its ASCII structure, a STEP-file is easy to read, with typically one instance per line. The format of a STEP-File is defined in ISO 10303-21 ''Clear Text Encoding of the Exchange Structure''. ISO 10303-21 defines the encoding mechanism for representing data conforming to a particular schema in the EXPRESS data modeling language specified in ISO 10303-11. A STEP-File is also called ''p21-File'' and ''STEP Physical File''. The file extensions ''.stp'' and ''.step'' indicate that the file contains data conforming to STEP Application Protocols while the extension ''.p21'' should be used for all other purposes. History Some details to take note of: * The first edition, ISO 10303-21:1994, had some bugs, which were corrected by a Technical Corrigendum. Therefore, it is recommended that users study the second edition instead (see b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PLOT3D File Format
In computational fluid dynamics, the PLOT3D file format is a standard file format used for storing grid and results data. PLOT3D was created by NASA Ames Research Center in 1982 by Pieter Buning and remains an often used file format. It can only store a structured grid. The structured grid allows random access, that is by knowing the block number, ''i'' location, ''j'' location, and ''k'' location, any grid point value or result value may be extracted. Additionally, given the location of any value, the block number, ''i'' location, ''j'' location, and ''k'' location may be determined. This makes it simple to iterate through a series of volumetric elements and calculate all required properties for the purpose of a Computational fluid dynamics, CFD analysis. The most basic format includes two different files, a grid file (G-file) and a solution file (Q-file). The filename extension, filename extensions used vary, though .q is common for Q-files. Grid files may use .g, .x, .xy, or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
STL (file Format)
STL is a file format native to the stereolithography CAD software created by 3D Systems. STL has several backronyms such as "Standard Triangle Language" and "Standard Tessellation Language". This file format is supported by many other software packages; it is widely used for rapid prototyping, 3D printing and computer-aided manufacturing. STL files describe only the surface geometry of a three-dimensional object without any representation of color, texture or other common CAD model attributes. The STL format specifies both ASCII and binary representations. Binary files are more common, since they are more compact. An STL file describes a raw, unstructured triangulated surface by the unit normal and vertices (ordered by the right-hand rule) of the triangles using a three-dimensional Cartesian coordinate system. In the original specification, all STL coordinates were required to be positive numbers, but this restriction is no longer enforced and negative coordinates are commonly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skin Friction Drag
Skin friction drag is a type of aerodynamic or hydrodynamic drag, which is resistant force exerted on an object moving in a fluid. Skin friction drag is caused by the viscosity of fluids and is developed from laminar drag to turbulent drag as a fluid moves on the surface of an object. Skin friction drag is generally expressed in terms of the Reynolds number, which is the ratio between inertial force and viscous force. Total drag can be decomposed into a skin friction drag component and a pressure drag component, where pressure drag includes all other sources of drag including lift-induced drag. In this conceptualisation, lift-induced drag is an artificial abstraction, part of the horizontal component of the aerodynamic reaction force. Alternatively, total drag can be decomposed into a parasitic drag component and a lift-induced drag component, where parasitic drag is all components of drag except lift-induced drag. In this conceptualisation, skin friction drag is a component of pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
