参数化建模变量.PPT

Maxwell 2D 参数化和后处理宏 参数化建模简介 什么是参数化建模？ 可以兼容一系列FEM问题 ，进而连续对各个问题求解 使用参数化的主要优势是什么？ 估算和优化一系列设计方案 成百上千的问题都可以一次性处理 Parametric solution provides input for Equivalent Circuit Generator 参数化建模典型例子 The force on a plunger at various operating positions The power losses as a function of frequency The torque on a motor throughout a range of rotational positions 一个设备在不同电流下的响应 函数变化的电场 一个设备的最合适壁厚的选择 参数化建模变量 五种可能的变量类型 物体的移动 物体的形状变化 材料属性的变化 电源的变化 频率的扫描过程 参数化建模物体的移动 在建模中通过定义约束设置参数 一个约束包含两个顶点 (起点和终点) 起点必须是要移动的物体外的一个点 终点必须是要移动的物体周边上的一个点 起点可以是在模型物体上，也可以在非模型物体 一个物体只能由一个和外界物体间的运行约束 另外，一个物体可以通过使用Constraint / Add / rotation 命令实现旋转 参数化建模Object Shape Change Setup by defining constraints in the Modeler A constraint consists of two vertices (one anchor point and one target point) BOTH anchor point and target point reside on the perimeter of the object whose shape will change A constraint is required for EACH vertex to be moved To actually expand and contract the length of a rectangle for instance, two separate constraints will need to be defined but each constraint can reference the same parametric variable 参数化建模Material Property Change Setup by defining a variable in the Material Manager Appropriate for LINEAR materials properties (permeability in magnetostatic solutions and permitivity in electrostatic solutions) Example: initialize a material property parametric variable to change linear permeability in a magnetostatic problem Add a Material to the database Select the Options button in the property declaration region Toggle the Mu declaration from Constant to Function“ Select the Functions button in the property declaration region Enter a new variable; call it mufunc= 1000 for instance Enter the variable name into the Mu declaration box 参数化建模Material Property Change 参数化建模Source Change Setup by defining a variable in the Boundary Manager Currents in magnetostatic solutions and voltages in electrostatic solutions Example: initialize a source change parameter variable to change the