A Three-dimensional Finite-element Thermal/mechanical Analytical Technique for High-performance Traveling Wave Tubes
National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program, 1991 - Astronautics - 14 pages
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actual twt applied bakeout Bartos boundary conditions Brian Fite closure coining analysis commercially available finite-element components compression computer model contact pressure Copper Cylindrical coordinate system deformation diamond rods diamond support rods dimensional dimensions Elastic modulus equivalent conductivity fabrication process figure 14 finite-element model Finite-Element Thermal/Mechanical Analytical future twt development gap elements gap nodes Glidcop outer diameter Glidcop sleeve heat transfer analysis heat transfer model helix sections high-efficiency high-performance traveling wave Hughes Aircraft input power interface coefficients iterations K-band TWT design kW/m Lewis Research Center marc program Measured helix temperature Mises stress NASA nonlinear normal operation outer diameter temperature plastic strain power level Richard Sharp shown in figure simulate the fabrication slow-wave structure space communications systems structural/thermal analysis thermal flux thermal loading Thermal/Mechanical Analytical Technique thermal/structural analysis Three-Dimensional Finite-Element Thermal/Mechanical tolerance value traveling wave tube Tungsten twt development efforts twt's ultimate power loading wave tube twt yield strength