如何設置PML邊界條件？怎么解決Error:The material of the PML base object cannot be anisotropic？

2016-11-14 by:CAE仿真在線來源:仿真在線

2-line-antenna (L:/hfss/華為團體培訓/ansoft-hfss-caoshanyong/Ch 02/)
HFSSDesign1 (DrivenModal)
[warning] HFSSDesign1: Solutions have been invalidated. Undo to recover. (4:49:11 下午十一月 14, 2015)
[info] Solution Setup 'Setup1', Sweep 'Sweep': Interpolating sweep converged. (4:53:29 下午十一月 14, 2015)
[info] Normal completion of simulation on server: Local Machine. (4:53:29 下午十一月 14, 2015)
[warning] HFSSDesign1: Solutions have been invalidated. Undo to recover. (4:58:10 下午十一月 14, 2015)
[warning] Adaptive Passes did not converge based on specified criteria. (4:58:23 下午十一月 14, 2015)
[info] Solution Setup 'Setup1', Sweep 'Sweep': Interpolating sweep converged. (4:58:44 下午十一月 14, 2015)
[info] Normal completion of simulation on server: Local Machine. (4:58:45 下午十一月 14, 2015)
[warning] HFSSDesign1: Solutions have been invalidated. Undo to recover. (5:00:48 下午十一月 14, 2015)
[error] An object that is assigned the zero-conductivity material 'vacuum' must have 'Solve Inside' enabled. (5:02:27 下午十一月 14, 2015)
[warning] HFSSDesign1: Solutions have been invalidated. Undo to recover. (5:17:09 下午十一月 14, 2015)
[warning] HFSSDesign1: Solutions have been invalidated. Undo to recover. (5:17:45 下午十一月 14, 2015)
[warning] Boundary 'Rad1': Boundary lost its assignment due to geometry modifications and has been deleted. (5:24:44 下午十一月 14, 2015)
[warning] Warning - Boundary 'PerfE1' and Boundary 'PML_radiation1' overlap. (6:31:25 下午十一月 14, 2015)
[warning] Warning - Boundary 'PerfE1' and Boundary 'PML_radiation2' overlap. (6:31:25 下午十一月 14, 2015)
[error] %1 '%2':: The material of the PML base object cannot be anisotropic. (6:31:25 下午十一月 14, 2015)
[warning] PML group 'PMLGroup1' part 'PML_Box1_1' is contained by object 'Box2' (6:31:25 下午十一月 14, 2015)
[warning] PML Setup: PML Material parameters are out of sync with the problem setup and need to be recalculated using the PML Setup Wizard. (6:31:25 下午十一月 14, 2015)

上面提示存在2個問題

1、An object that is assigned the zero-conductivity material 'vacuum' must have 'Solve Inside' enabled
這個表示真空材料,你不能修改對象屬性里面的Solve Inside為disable,即不打勾真空材料必須solve inside,否則出錯。

既然是真空了,難道還有表面之分嗎?

2、The material of the PML base object cannot be anisotropic

翻譯:基于PML的材料對象,不能是各相異性的。

出現這個問題,是把帶有各向異性的3d對象設置成了PML對象,這樣是不行的,PML對象一般是真空或各向同性材料對象

問題的根本學員對PML設置流程不了解。

PML要么設置在面上(hfss會自動根據所選擇的面,創建PML層對象),要么設置在體上,而設置在體上表示那些小方塊都由你自己去創建,而不是hfss自動創建。

創建PML邊界的正確做法步驟:

1、先做一個空氣盒子,這個空氣盒子離模型應該大于lambda/20,(比輻射邊界的1/4要小多了,但是你別高興的太早了)

2、然后選擇這個空氣盒子的6個面(記得,是面face不是object哦)

3、然后asign boundary-》pml setup wizard

然后進行如圖設置,數據一般用默認的就行了,他會根據你設置的頻率范圍進行合理計算(一般邊界層寬度要大于1/3波長,這里你是不是嚇倒了?比1/4波長更長誒)。

The material of the PML base object cannot be anisotropicansys hfss圖片1