{"id":158593,"date":"2021-05-18T00:47:16","date_gmt":"2021-05-18T00:47:16","guid":{"rendered":"\/forum\/forums\/topic\/ansys-insight:-xiugaipmlnaxiecanshukeyiyouxiaoyizhifdtdfasan"},"modified":"2022-08-05T09:05:29","modified_gmt":"2022-08-05T09:05:29","slug":"ansys-insight-xiugaipmlnaxiecanshukeyiyouxiaoyizhifdtdfasan","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/ansys-insight-xiugaipmlnaxiecanshukeyiyouxiaoyizhifdtdfasan\/","title":{"rendered":"Ansys Insight: \u4fee\u6539PML\u54ea\u4e9b\u53c2\u6570\u53ef\u4ee5\u6709\u6548\u6291\u5236FDTD\u53d1\u6563"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>\u5728\u524d\u9762\u7684\u8fd9\u4e2a\u5e16\u5b50\u4e2d <a href=\"\/forum\/discussion\/25128\/ansys-insight-fdtd-%E5%92%8C-varfdtd-%E5%B8%B8%E8%A7%81%E7%9A%84%E5%8F%91%E6%95%A3%E5%8E%9F%E5%9B%A0%E4%BB%A5%E5%8F%8A%E5%A4%84%E7%90%86#latest\" rel=\"nofollow\">Ansys Insight: FDTD \u548c varFDTD \u5e38\u89c1\u7684\u53d1\u6563\u539f\u56e0\u4ee5\u53ca\u5904\u7406<\/a> \uff0c\u9664\u4e86\u4ecb\u7ecd\u4e24\u4e2a\u5e38\u89c1\u7684\u4eff\u771f\u53d1\u6563\u5904\u7406\u65b9\u6cd5\u5916\uff0c\u8fd8\u63d0\u4f9b\u4e86\u51e0\u4e2a\u53ef\u80fd\u5bfc\u81f4\u53d1\u6563\u7684\u539f\u56e0\uff0c\u7528\u6237\u53ef\u4ee5\u6839\u636e\u60c5\u51b5\u505a\u9002\u5f53\u4fee\u6539\u3002<\/p>\n<p>PML\uff08\u00a0<strong>perfectly matched layer<\/strong>\u00a0)\u662fFDTD\u5927\u89c4\u6a21\u5e94\u7528\u7684\u4e00\u4e2a\u91cc\u7a0b\u7891\uff0c\u6700\u521d\u7531\u6cd5\u56fd\u79d1\u5b66\u5bb6Berenger\u5728\uff11\uff19\uff19\uff14\u5e74\u63d0\u51fa\u7684\u3010\uff11\u3011\uff0c\u53c2\u8003\u6587\u732e\u89c1\u540e\u3002 \u8fd9\u662f\u4e00\u79cd\u4eba\u4e3a\u7684\u6570\u503c\u6750\u6599\uff0cArtificial\u7684\uff0c\u7406\u8bba\u4e0a\u53ef\u4ee5\u5c06\u7279\u5b9a\u7684\u5165\u5c04\u5e73\u9762\u6ce2\u5168\u90e8\u5438\u6536\uff0c\u6709\u6765\u65e0\u56de\uff0c\u56e0\u6b64\uff0cFDTD\u548c\u5176\u5b83\u7c7b\u4f3c\u7684\u5fae\u5206\u65b9\u7a0b\u6570\u503c\u6c42\u89e3\u7ecf\u5e38\u4f7f\u7528\uff0c\u8fdb\u800c\u4e5f\u53d1\u5c55\u7531\u4e0d\u540c\u7684\u65b9\u6cd5\uff0c\u8fd9\u91cc\u4e0d\u505a\u8868\u8ff0\u3002<\/p>\n<p>Lumerical\u63a8\u8350\u4f7f\u7528\u7684Stretched coordinate PML\uff0c\u539f\u6587\u732e\u89c1\u540e\u3010\uff12\u3011\u3002\u5f53\u53d1\u6563\u662f\u56e0\u4e3aPML\u53c2\u6570\u800c\u4e0d\u662fPML\u8ddd\u79bb\u7ed3\u6784\u592a\u8fd1\u7684\u60c5\u51b5\u4e0b\uff0c\u9700\u8981\u4fee\u6539\u4e00\u4e9bPML\u7684\u53c2\u6570\u3002\u4e3a\u6b64\uff0cLumerical\u7684FDTD\u63d0\u4f9b\u4e86\u51e0\u5957\u4e0d\u540c\u7684PML\u53c2\u6570\uff08\u8f6f\u4ef6\u4e2d\u79f0\u4e3a\u00a0profiles\uff09\u5e94\u5bf9\u5e38\u89c1\u7684\u539f\u56e0\uff1a<\/p>\n<h2>Standard\uff1a<\/h2>\n<p>\u7f3a\u7701\uff08\u9ed8\u8ba4\uff09\u8bbe\u7f6e\uff0c\u7528\u4e8e\u7edd\u5927\u591a\u6570\u60c5\u51b5\uff0c\u7279\u522b\u662f\u7f51\u683c\u7cbe\u5ea6\u4e3a\uff11\u6216\u8005\uff12\u65f6\u6700\u5e38\u7528\u3002\u5982\u679c\u6ca1\u6709\u7ed3\u6784\u7a7f\u900fPML\uff0c \u8fd9\u5957PML\u4e00\u822c\u6765\u8bf4\u975e\u5e38\u6709\u6548\u3002<\/p>\n<p><strong>\u53c2\u6570\u8c03\u6574<\/strong>\uff1a\u3000\u5c42\u6570\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cPML\u7684\u6709\u6548\u6027\u5e76\u4e0d\u4ec5\u4ec5\u53d6\u51b3\u4e8e\u5c42\u6570\uff0c\u800c\u662f\u4e3b\u8981\u53d6\u51b3\u4e8ePML\u7684\u539a\u5ea6\u3002<\/p>\n<p>\u5982\u679c\u6709\u7ed3\u6784\u7a7f\u8fc7PML\u800c\u4e14\u53d1\u6563\uff0c\u53ef\u4ee5\u91c7\u7528\u4e0b\u9762\u8fd9\u5957\u3002<\/p>\n<h2>Stabilized\uff1a<\/h2>\n<p>\u5f53\u6709\u7ed3\u6784\u7a7f\u900fPML\u65f6\uff0c\u6709\u53ef\u80fd\u4ea7\u751f\u6570\u503c\u4e0d\u7a33\u5b9a\u6027\uff0c\u7279\u522b\u662f\u8272\u6563\u6750\u6599\u3002<\/p>\n<p><strong>\u53c2\u6570\u8c03\u6574<\/strong>\uff1a\u3000\u5c42\u6570\u3002<\/p>\n<p>\u4e0d\u8fc7\uff0c\u6b64\u5957PML\u7684\u7f3a\u70b9\u662f\u5c42\u6570\u592a\u591a\uff0c\u6709\u65f6\u5bfc\u81f4\u4eff\u771f\u5185\u5b58\u9700\u6c42\u8f83\u5927\u3002<\/p>\n<p>\u9057\u61be\u7684\u662f\uff0c\u6b64PML\u4e3b\u8981\u76ee\u7684\u662f\u4e3a\u4e86\u9632\u6b62\u4eff\u771f\u53d1\u6563\uff0c\u56e0\u6b64\u5176\u5438\u6536\u6027\u80fd\u7a0d\u5dee\uff0c\u9700\u8981\u66f4\u591a\u7684\u5c42\u6570\u3002<\/p>\n<h2><strong>Steep angle\uff1a<\/strong><\/h2>\n<p>\u4e00\u822c\u5728\u5468\u671f\u7ed3\u6784\u4eff\u771f\uff0c\u6709\u9ad8\u7ea7\u884d\u5c04\u4e14\u884d\u5c04\u89d2\u6216\u8005\u5149\u6e90\u5165\u5c04\u89d2\u975e\u5e38\u5927\uff0c\u6bd4\u598280\u5ea6\u6216\u4ee5\u4e0a\u65f6\uff0c\u5efa\u8bae\u91c7\u7528\u6b64\u5957PML\u3002<\/p>\n<p>\u4e0d\u591f\uff0c\u5982\u679c\u7f51\u683c\u7cbe\u5ea6\u8f83\u4f4e\uff0c\u6bd4\u5982\u4f4e\u4e8e\u7cbe\u5ea6\uff12\uff0c\u5373\u6bcf\u4e2a\u6ce2\u957f\u5341\u4e2a\u7f51\u683c\uff0c\u5176\u5438\u6536\u6027\u80fd\u4e0d\u5982Standard\u7684PML\u597d\u3002<\/p>\n<p><strong>\u53c2\u6570\u8c03\u6574<\/strong>\uff1a\u3000\u5c42\u6570\u3002<\/p>\n<h2>Custom\uff1a<\/h2>\n<p>\u5f53\u5206\u522b\u7528\u4e0a\u8ff0\u4e09\u5957PML\u901a\u8fc7\u8c03\u6574\u5c42\u6570\u4ecd\u7136\u4e0d\u6536\u655b\uff0c\u6216\u8005\u7528\u5230\u6700\u5927\u5c42\u6570\u6536\u655b\u4f46\u662f\u9700\u8981\u5185\u5b58\u592a\u5927\uff0c\u4eff\u771f\u65f6\u95f4\u592a\u957f\u65f6\uff0c\u6709\u7ecf\u9a8c\u7684\u7528\u6237\u5e0c\u671b\u80fd\u591f\u8c03\u6574PML\uff0c\u53ef\u4ee5\u91c7\u7528\u8fd9\u79cd\u65b9\u6cd5\u3002<\/p>\n<p><strong>\u53c2\u6570\u8c03\u6574<\/strong>\uff1a<\/p>\n<p>1\uff1a\u589e\u52a0alpha \uff08\u6b64\u91cf\u65e0\u5355\u4f4d\uff09\u3002\u7f3a\u70b9\uff0c\u867d\u7136\u53ef\u80fd\u6291\u5236\u53d1\u6563\uff0c\u4f46\u662f\u53cd\u5c04\u53ef\u80fd\u4f1a\u9ad8\u4e00\u4e9b\u3002<\/p>\n<p>2\uff1a\u589e\u52a0 \u00a0alpha \/ sigma\uff0c\u5373\u56fa\u5b9a\u00a0alpha\u51cf\u5c0f\u00a0sigma\uff0c\u6216\u8005\u53cd\u4e4b\u3002\u7f3a\u70b9\uff0c\u540c\u4e0a\u3002<\/p>\n<p>\u8fd9\u4e9b\u53c2\u6570\u4ecb\u7ecd\u53c2\u89c1\u6587\u732e\u6216<a href=\"https:\/\/support.lumerical.com\/hc\/en-us\/articles\/360034382674-PML-boundary-conditions-in-FDTD-and-MODE\" rel=\"nofollow\">\u5b98\u7f51\u94fe\u63a5[3]<\/a>.<\/p>\n<p><strong>\u5176\u5b83\u65b9\u6cd5\uff1a<\/strong><\/p>\n<p>1\uff1a\u56e0\u4e3a\u662fPML\u7684\u603b\u539a\u5ea6\u80fd\u6709\u6548\u5438\u6536\uff0c\u56e0\u6b64\uff0c\u4e5f\u53ef\u4ee5\u5728\u7ed9\u5b9a\u7684Mesh\u3000Accuracy\u60c5\u51b5\u4e0b\uff0c\u5728PML\u4e4b\u524d\u6dfb\u52a0\u4e00\u4e2a\u65b9\u5411\u7684Override\u7f51\u683c\u4f7f\u5f97\u7f51\u683c\u9002\u5f53\u53d8\u7c97\uff0c\u6bd4\u5982\u7cbe\u5ea62\u60c5\u51b5\u4e0b\u7684\u7f51\u683c\u5c3a\u5bf8\u3002\u7f3a\u70b9\uff0c\u56e0\u4e3a\u7f51\u683c\u5c3a\u5bf8\u53d8\u5316\u4e14\u53d8\u7c97\uff0c\u6709\u53ef\u80fd\u4f1a\u589e\u52a0\u53cd\u5c04\u3002<\/p>\n<p>2\uff1a\u5982\u679c\u662f\u6709\u91d1\u5c5e\u6750\u6599\u7a7f\u8fc7PML\u4ea7\u751f\u7684\u53d1\u6563\uff0c\u53ef\u4ee5\u5c06\u91d1\u5c5e\u7ed3\u6784\u53d8\u5c0f\u4e0d\u8981\u7a7f\u8fc7PML\uff0c\u8fd9\u4e2a\u6280\u5de7\u5728\u524d\u9762\u5e16\u5b50\u4e2d\u5df2\u7ecf\u63d0\u53ca\u3002<\/p>\n<p>\u6ce8\uff1a\u5982\u679c\u7ecf\u9a8c\u4e0d\u8db3\uff0c\u5efa\u8bae\u4ec5\u5c06\u6700\u5927\u53ef\u7528\u7684\u5c42\u6570\u589e\u52a0\uff0c\u6b64\u65f6\u53ef\u4ee5\u4f7f\u7528\u539fPML\u7684Profile\u53c2\u6570\uff0c\u4ec5\u9700\u8981\u5c06\u6700\u5927\u5c42\u6570\u589e\u52a0\u5373\u53ef\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u9664\u4e86Stretched coordinate PML\u4e4b\u5916\uff0c\u6700\u65e9\u5f00\u53d1\u7684uniaxial anisotropic PML\u4e5f\u662f\u53ef\u4ee5\u4f7f\u7528\u7684\u3002\u66fe\u7ecf\u6709\u4e00\u4e2aCASE\u65e0\u8bba\u600e\u4e48\u8c03\u6574\u603b\u662f\u53d1\u6563\uff0c\u540e\u6765\u91c7\u7528\u8fd9\u79cd\u65b9\u6cd5\u53cd\u800c\u5b9e\u73b0\u4e86\u6536\u655b\u3002<\/p>\n<p>\u603b\u4e4b\uff0c\u3000\u53d1\u6563\u95ee\u9898\u6bd4\u8f83\u590d\u6742\uff0c\u4e0e\u5149\u6e90\u5149\u8c31\u548c\u8bbe\u7f6e\u3001\u7f51\u683c\u5c3a\u5bf8\u3001\u65f6\u95f4\u6b65\u957f\u3001\u6750\u6599\u62df\u5408\u548c\u6750\u6599\u7279\u6027\uff0c\u4ee5\u53ca\u7ed3\u6784\u4e0ePML\u7684\u76f8\u4e92\u4f5c\u7528\u7684\u7ed9\u90fd\u53ef\u80fd\u4e0ePML\u5bfc\u81f4\u7684\u53d1\u6563\u6709\u5173\u3002<\/p>\n<p>\u8bca\u65ad\u53d1\u6563\u65f6\u53ef\u4ee5\u7528Movie\u76d1\u89c6\u5668\uff0c\u6216\u8005\u6dfb\u52a0Profile\u76d1\u89c6\u5668\u4f46\u662f\u8bb0\u5f55PML\u91cc\u9762\u7684\u6570\u636e\u6709\u53ef\u80fd\u53d1\u73b0\u662f\u90a3\u91cc\u5bfc\u81f4\u53d1\u6563\u7684\u3002<\/p>\n<div class=\"embedExternal embedImage\">\n<div class=\"embedExternal-content\"><a class=\"embedImage-link\" href=\"\/forum\/wp-content\/uploads\/forum-uploads\/549\/6QWC7IVA6LAK.png\" target=\"_blank\" rel=\"nofollow noopener\"><br \/>\n<img decoding=\"async\" class=\"embedImage-img\" src=\"\/forum\/wp-content\/uploads\/forum-uploads\/549\/6QWC7IVA6LAK.png\" alt=\"image.png\" \/><br \/>\n<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"template":"","class_list":["post-158593","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":[""],"_bbp_old_reply_author_name_id":["Anonymous"],"_bbp_old_is_reply_anonymous_id":["false"],"_btv_view_count":["3449"],"_bbp_likes_count":["0"],"_edit_lock":["1659690572:76739"],"_edit_last":["76739"],"_wp_old_slug":["ansys-insight:-xiugaipmlnaxiecanshukeyiyouxiaoyizhifdtdfasan"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["158593"],"_bbp_forum_id":["27835"],"_bbp_engagement":["2592"],"_bbp_voice_count":["1"],"_bbp_reply_count":["0"],"_bbp_last_reply_id":["0"],"_bbp_last_active_id":["158593"],"_bbp_last_active_time":["2021-05-18 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