光吸收率大于1

- February 2, 2023 at 11:17 am
  
  rui fang
  Subscriber
  
  为什么Pabs分析组的Pabs_total结果大于1
- February 2, 2023 at 4:23 pm
  
  Guilin Sun
  Ansys Employee
  
  常见的问题是仿真时间不够，请参见英文帖子的回复。另外也有可能是仿真即将发散，用时间监视器看看，还有就是PML反射，不过不应该如此之大。你也可以用这个分析组仿真网上的例子看看结果是否正确，看看里面脚本是否不小心误改了。
  - February 3, 2023 at 2:37 am
    
    rui fang
    Subscriber
    
    和仿真时间好像没有关系，我增加了仿真时间结果和这类似，我用反对称边界条件也是一样。您可以留个邮箱吗？我把源文件发给您，麻烦您帮我看一下。
  - February 3, 2023 at 3:47 am
    
    rui fang
    Subscriber
    
    我增加Mesh将网格划分特别细致后结果能够小于1了，谢谢您提供的建议。再请问一下您，在FDTD中怎么将某一矩形结构设置为半无限大？
- February 3, 2023 at 3:48 am
  
  Guilin Sun
  Ansys Employee
  
  你如果有Premium注册，可以发技术支持邮箱，并引用此帖子。
  你有用这个分析组测试网上文件了吗？要测试后才知道分析组以后没有问题。分析组没有问题还是设置问题。
- February 3, 2023 at 3:52 am
  
  Guilin Sun
  Ansys Employee
  
  半无限就是基底或者包层，同PML截断。无限大的结构是膜层结构，如果不能用周期边界，也是PML来截断。
  - February 3, 2023 at 4:31 am
    
    rui fang
    Subscriber
    
    噢噢，那仿真区域PML边界是需要在矩形结构内部还是矩形结构外部？
- February 3, 2023 at 6:04 pm
  
  Guilin Sun
  Ansys Employee
  
  我不知道你说的矩形是什么，在哪里，起什么作用。
  基底的厚度方向是半无限大，需要延申到PML之外；基底的横向尺寸是无限大，也需要延申到PML或者周期边界之外。

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