doc/salome/gui/SMESH/files/about_hypotheses.htm

   1 <!doctype HTML public "-//W3C//DTD HTML 4.0 Frameset//EN">\r
   2 \r
   3 <html>\r
   4 \r
   5 <head>\r
   6 <title>About hypotheses</title>\r
   7 <meta http-equiv="content-type" content="text/html; charset=windows-1252">\r
   8 <meta name="generator" content="RoboHelp by eHelp Corporation www.ehelp.com">\r
   9 <link rel="stylesheet" href="../default_ns.css"><script type="text/javascript" language="JavaScript" title="WebHelpSplitCss">\r
  10 <!--\r
  11 if (navigator.appName !="Netscape")\r
  12 {   document.write("<link rel='stylesheet' href='../default.css'>");}\r
  13 //-->\r
  14 </script>\r
  15 <style type="text/css">\r
  16 <!--\r
  17 img_whs1 { border:none; width:30px; height:30px; float:none; border-style:none; }\r
  18 ul.whs2 { list-style:disc; }\r
  19 p.whs3 { background-color:Transparent; color:#000000; }\r
  20 ol.whs4 { list-style:disc; }\r
  21 -->\r
  22 </style><script type="text/javascript" language="JavaScript">\r
  23 <!--\r
  24 if ((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) == 4))\r
  25 {\r
  26   var strNSS = "<style type='text/css'>";\r
  27   strNSS += "p.whs3 {background-color:white; }";\r
  28   strNSS +="</style>";\r
  29   document.write(strNSS);\r
  30 }\r
  31 //-->\r
  32 </script>\r
  33 <script type="text/javascript" language="JavaScript" title="WebHelpInlineScript">\r
  34 <!--\r
  35 function reDo() {\r
  36   if (innerWidth != origWidth || innerHeight != origHeight)\r
  37      location.reload();\r
  38 }\r
  39 if ((parseInt(navigator.appVersion) == 4) && (navigator.appName == "Netscape")) {\r
  40         origWidth = innerWidth;\r
  41         origHeight = innerHeight;\r
  42         onresize = reDo;\r
  43 }\r
  44 onerror = null; \r
  45 //-->\r
  46 </script>\r
  47 <style type="text/css">\r
  48 <!--\r
  49 div.WebHelpPopupMenu { position:absolute; left:0px; top:0px; z-index:4; visibility:hidden; }\r
  50 -->\r
  51 </style><script type="text/javascript" language="javascript1.2" src="../whmsg.js"></script>\r
  52 <script type="text/javascript" language="javascript" src="../whver.js"></script>\r
  53 <script type="text/javascript" language="javascript1.2" src="../whproxy.js"></script>\r
  54 <script type="text/javascript" language="javascript1.2" src="../whutils.js"></script>\r
  55 <script type="text/javascript" language="javascript1.2" src="../whtopic.js"></script>\r
  56 </head>\r
  57 <body page-style="x-size: Letter;"><script type="text/javascript" language="javascript1.2">\r
  58 <!--\r
  59 if (window.gbWhTopic)\r
  60 {\r
  61         if (window.addTocInfo)\r
  62         {\r
  63         addTocInfo("MESH module\nCreating meshes\nDefining hypotheses\nAbout Hypotheses");\r
  64 addButton("show",BTN_TEXT,"Show","","","","",0,0,"","","");\r
  65 \r
  66         }\r
  67         if (window.writeBtnStyle)\r
  68                 writeBtnStyle();\r
  69 \r
  70         if (window.writeIntopicBar)\r
  71                 writeIntopicBar(1);\r
  72 \r
  73         if (window.setRelStartPage)\r
  74         {\r
  75         setRelStartPage("../smesh.htm");\r
  76 \r
  77                 autoSync(1);\r
  78                 sendSyncInfo();\r
  79                 sendAveInfoOut();\r
  80         }\r
  81 }\r
  82 else\r
  83         if (window.gbIE4)\r
  84                 document.location.reload();\r
  85 //-->\r
  86 </script>\r
  87 <h1>About hypotheses</h1>\r
  88 \r
  89 <p><img src="../i_blue.jpg" x-maintain-ratio="TRUE" width="30px" height="30px" border="0" class="img_whs1"> <span style="font-weight: bold;"><B>Hypotheses</B></span> represent \r
  90  boundary conditions which will be taken into account at calculations of \r
  91  meshes or submeshes basing on geometrical objects. These hypotheses allow \r
  92  you to manage the level of detail of the resulting meshes or submeshes: \r
  93  when applying different hypotheses with different parameters you can preset \r
  94  the quantity of meshing elements which will compose your mesh. So, it \r
  95  will be possible to generate a rough or a more refined mesh or submesh. \r
  96  </p>\r
  97 \r
  98 <p>&nbsp;</p>\r
  99 \r
 100 <p>In <span style="font-weight: bold;"><B>MESH </B></span>there are the following \r
 101  Basic Hypotheses (to introduce them, you operate numerical values):</p>\r
 102 \r
 103 <ul type="disc" class="whs2">\r
 104         \r
 105         <li style="list-style: circle; /*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "\r
 106                 type=circle\r
 107                 class=kadov-p><p class="whs3"><a href="arithmetic_1d.htm">1D Hypotheses</a> (for meshing of <span style="font-weight: bold;"><B>edges)</B></span>:</p></li>\r
 108         \r
 109         <ul type="disc" class="whs2">\r
 110                 \r
 111                 <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "\r
 112                         class=kadov-p><p class="whs3"><a href="arithmetic_1d.htm#arithmetic_1D">Arithmetic 1D</a></p></li>\r
 113                 \r
 114                 <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "\r
 115                         class=kadov-p><p class="whs3"><a href="arithmetic_1d.htm#Average_length">Average Length</a></p></li>\r
 116                 \r
 117                 <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "\r
 118                         class=kadov-p><p class="whs3"><a href="arithmetic_1d.htm#deflection_1D">Deflection 1D </a></p></li>\r
 119                 \r
 120                 <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "\r
 121                         class=kadov-p><p class="whs3"><a href="arithmetic_1d.htm#Number_of_elements">Number of segments</a></p></li>\r
 122                 \r
 123                 <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "\r
 124                         class=kadov-p><p class="whs3"><a href="arithmetic_1d.htm#start_and_end_length">Start and end length</a></p></li>\r
 125                 \r
 126                 <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "\r
 127                         class=kadov-p><p class="whs3"><a href="arithmetic_1d.htm#automatic_length">Automatic Length</a></p></li>\r
 128         </ul>\r
 129         \r
 130         <li style="list-style: circle; /*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "\r
 131                 type=circle\r
 132                 class=kadov-p><p class="whs3"><a href="max._element_area_hypothesis.htm">2D Hypotheses</a> (for meshing \r
 133  of <span style="font-weight: bold;"><B>faces)</B></span>: </p></li>\r
 134 </ul>\r
 135 \r
 136 <ol type="disc" class="whs4">\r
 137         \r
 138         <ul type="disc" class="whs2">\r
 139                 \r
 140                 <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "\r
 141                         class=kadov-p><p class="whs3"><a href="max._element_area_hypothesis.htm#max_element_area">Max Element Area</a></p></li>\r
 142                 \r
 143                 <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "\r
 144                         class=kadov-p><p class="whs3"><a href="max._element_area_hypothesis.htm#length_from_edges">Length from \r
 145  Edges</a></p></li>\r
 146                 \r
 147                 <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "\r
 148                         class=kadov-p><p class="whs3"><a href="max._element_area_hypothesis.htm#quadrangle preference">Quadrangle \r
 149  Preference</a></p></li>\r
 150         </ul>\r
 151 </ol>\r
 152 \r
 153 <ul type="disc" class="whs2">\r
 154         \r
 155         <li style="list-style: circle; /*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "\r
 156                 type=circle\r
 157                 class=kadov-p><p class="whs3">3D \r
 158  Hypothesis (for meshing of <span style="font-weight: bold;"><B>volumes)</B></span>: \r
 159  </p></li>\r
 160         \r
 161         <ul type="disc" class="whs2">\r
 162                 \r
 163                 <li class=kadov-p><p><a href="max._element_volume_hypothsis.htm">Max \r
 164  Element Volume</a></p></li>\r
 165         </ul>\r
 166 </ul>\r
 167 \r
 168 <p>&nbsp;</p>\r
 169 \r
 170 <p>There also exist some <a href="non_conform_mesh_allowed_hypothesis.htm">Additional \r
 171  Hypotheses</a></p>\r
 172 \r
 173 <ul type="disc" class="whs2">\r
 174         \r
 175         <ul type="disc" class="whs2">\r
 176                 \r
 177                 <li class=kadov-p><p>Propagation of 1D Hypothesis on opposite edges</p></li>\r
 178                 \r
 179                 <li class=kadov-p><p>Non conform mesh allowed</p></li>\r
 180                 \r
 181                 <li class=kadov-p><p>Quadratic mesh</p></li>\r
 182         </ul>\r
 183 </ul>\r
 184 \r
 185 <p>&nbsp;</p>\r
 186 \r
 187 <p>The choice of a hypothesis depends on:</p>\r
 188 \r
 189 <ul type="disc" class="whs2">\r
 190         \r
 191         <li class=kadov-p><p>the geometrical object (shape) which will be meshed</p></li>\r
 192         \r
 193         <li class=kadov-p><p>the algorithm, which will be selected for meshing \r
 194  of this geometrical object (shape)</p></li>\r
 195 </ul>\r
 196 \r
 197 <p>&nbsp;</p>\r
 198 \r
 199 <p>&nbsp;</p>\r
 200 \r
 201 <script type="text/javascript" language="javascript1.2">\r
 202 <!--\r
 203 if (window.writeIntopicBar)\r
 204         writeIntopicBar(0);\r
 205 //-->\r
 206 </script>\r
 207 </body>\r
 208 </html>\r