航天器热剖析教程.ppt

Transient Analysis of a satellite in Orbit  8 Application Software Siemens Plm Software-NX 软件介绍:NX是德国 Siemens公司开发的 CAD/CAM/CAE软件 1.三维建模、钣金( Modeling、 Metal plate) 2外观造型设计( Appearance modeling design) 3加工( Machining) 4运动仿真( Motion simulation) 5.模具设计( Mold design) 6变量化分析( Variation Analysis) 7响应分析( Response Analysis) 8.复合铺合分析( Laminate Composites) 9.注塑冷却顾问( Part Advisor) 10.机电概念设计( Electromechanical Concept Design) 11.产品寿命预测( Durability 12高级产品寿命预测( Advanced Durability) 13.电子系统冷却仿真( Electronic System Cooling) 14航空传热仿真( Space System Thermal)  Transient Analysis of a Satellite in Orbit 具体内容如下 create parts and FEA model 建立有限元模型 e define an orbit for the model 定义卫星轨道 set up transient analysis parameters定义暂态分析参数 evaluating temperature results 结果评估  S Part1 Creating the satellite with the UG Master Modeler Model File Name: satellite Application Space System Thermal Simulation Task Master Modeler 在 Master Modeler下建模 模型组成 1 main unit航天器主体12*1(米) 2 solar array太阳能电池阵950.80.0 模型如下图 3 antenna天线一抛物面 4 collector集电器 5 emitter 发射器 6 electronic电子器件  8 Part2 Meshing the Satellite Create fe model, Switch to meshing转到划分网格应用模块 2.1 Materia建立材料属性 Material Mass Density Thermal Specific Heat (kg/m3) Conductivity (J/kg C) Reflector 1400 16 1600 Honeycomb Aluminum 210 20 1600 Sun Side Panel 2100 200 1600 Dark Side Panel 2100 200 1600 Aluminum 2100 200 1600  22 thermo- optical coefficient建立热光属性 Name Emissivity Absorptivity DARK SIDE SOLAR PANEL 0.95 0.8 SUN SIDE SOLAR PANEL 0.85 SUN SIDE SOLAR PANEL 0.77 ALUMINUM PAINTED 0.9 0.1 ANTENNA FRONT 0.8 0.3 ANTENNA BACK 0.45 3  23 Physical properties单元建立物理性质 利用 NX Thin Shell Physical Property 分别建立Name:She2mm Thicknesses: 0.002m Shell 5mm 0.005m Shell 10mm 0.01m o精理属性表管理器一 Thin Shc113 迪器 Th in shell shelll Thin she l2 5 Thinshell  24分别对 main unit、 solar array、 antenna、 Collector、 Electronic Emitter定义网格划分 Mesh/ElementElement Physical Material