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Check the penetration and the number of equilibrium iterations used in each substep. If the global convergence difficulty is caused by too much penetration (rather than by residual forces and displacement increments), FKN may be underestimated or FTOLN may be too small. If the global convergence requires many equilibrium iterations for achieving convergence tolerances of residual forces and displacements rather than the resulting penetration, FKN or FKT may be overestimated.
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FKN may be underestimated or FTOLN may be too small£¬Õâ˵Ã÷ÄãÉèÖõÄFKN²»ºÏÀí£¬½¨ÒéÄãÈ¡´óÒ»µã£¬¿ÉÒÔÊÔÒ»ÏÂÈ¡0.8»òÕß1£¬¸Õ¶ÈϵÊý±¾À´¾ÍÊÇÊÔ³öÀ´µÄ£¬×îºó»æÖÆÒ»¸ö¸Õ¶ÈϵÊýºÍ¼ÆËã½á¹ûµÄÇúÏߣ¬ËãһϸնÈϵÊýµÄÁéÃô¶È¡£Ã¿Ò»×Ó²½µÄƽºâµü´úÊý¿ÉÒÔÔÚºÚÉ«µÄÇó½â״̬¶Ô»°¿òÀï¿´µ½£¬Ò²¿ÉÒÔ¿´ÊÕÁ²ÇúÏߵĺá×ø±ê¼°ÉÏ·½ÊÕÁ²Ê±¼ä£¬½¨ÒéÄãÔö´óÇó½â²½ÊýºÍµü´ú´ÎÊý£¬ÔÚÇó½âÑ¡ÏîÀï¶¼¿ÉÒÔ¸ü¸Ä
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2Â¥2013-10-24 19:48:55
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FTOLN Ϊ×î´ó´©Í¸Èݲ´©Í¸³¬¹ý´ËÖµ½«³¢ÊÔеĵü´ú¡£ÕâÊÇÒ»¸öÓë½Ó´¥µ¥ÔªÏÂÃæµÄʵÌåµ¥ÔªÉî¶È£¨h£©Ïà³ËµÄ±ÈÀýϵÊý£¬È±Ê¡Îª0.1¡£´Ëֵ̫С£¬»áÒýÆðÊÕÁ²À§ÄÑ¡£  
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3Â¥2013-10-24 21:33:30
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2Â¥: Originally posted by ϦÑôÓê at 2013-10-24 19:48:55
FKN may be underestimated or FTOLN may be too small£¬Õâ˵Ã÷ÄãÉèÖõÄFKN²»ºÏÀí£¬½¨ÒéÄãÈ¡´óÒ»µã£¬¿ÉÒÔÊÔÒ»ÏÂÈ¡0.8»òÕß1£¬¸Õ¶ÈϵÊý±¾À´¾ÍÊÇÊÔ³öÀ´µÄ£¬×îºó»æÖÆÒ»¸ö¸Õ¶ÈϵÊýºÍ¼ÆËã½á¹ûµÄÇúÏߣ¬ËãһϸնÈϵÊýµÄÁéÃô ...

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4Â¥2013-10-24 22:36:17
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3Â¥: Originally posted by fangdian at 2013-10-24 21:33:30
FTOLN Ϊ×î´ó´©Í¸Èݲ´©Í¸³¬¹ý´ËÖµ½«³¢ÊÔеĵü´ú¡£ÕâÊÇÒ»¸öÓë½Ó´¥µ¥ÔªÏÂÃæµÄʵÌåµ¥ÔªÉî¶È£¨h£©Ïà³ËµÄ±ÈÀýϵÊý£¬È±Ê¡Îª0.1¡£´Ëֵ̫С£¬»áÒýÆðÊÕÁ²À§ÄÑ¡£  
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