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Çѱ¹¼öÀÚ¿øÇÐȸ / v.35, no.6, 2002³â, pp.677-684
2Â÷¿ø À¯ÇÑ¿ä¼Ò¹ýÀ» ÀÌ¿ëÇÑ ÆÄ¶ûÀÇ Bragg¹Ý»ç ÇØ¼®
( Analysis of Bragg Reflection with Two-Dimensional Finite Element Method )
Á¶¿ë½Ä;Á¤¿ìâ; ÇѾç´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;È«ÀÍ´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;
 
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º» ¿¬±¸¿¡¼­´Â À¯ÇÑ¿ä¼Ò¹ýÀ» ÀÌ¿ëÇÏ¿© ¼ö½ÉÀÇ º¯È­¿¡ ÀÇÇØ ¹ß»ýµÇ´Â ÆÄ¶ûÀÇ È¸Àý¿¡ ´ëÇØ ¼öÄ¡Àû ¸ðÀǽÇÇèÀ» ¼öÇàÇÏ¿´´Ù. º» ¸ðÇüÀº Á¤ÇöÆÄÇü ÁöÇüÀ» Åë°úÇÏ´Â ´ÜÁ¶ÆÄÀÇ ¹Ý»çÀ²À» °è»êÇϴµ¥ Àû¿ëµÇ¾ú´Ù. °è»êµÈ ¹Ý»çÀ²Àº °íÀ¯ ÇÔ¼öÀü°³¹ý¿¡ ÀÇÇÑ °á°ú¿Í ¼ö¸®¸ðÇü½ÇÇè¿¡ ÀÇÇÑ °üÃø°á°ú¿Í ºñ±³ÇÏ¿© º» ÇØ¼®¹ýÀ» °ËÁõÇÏ¿´À¸¸ç, À̷κÎÅÍ Á¤ÇöÆÄÇü ÁöÇüÀÇ ÁøÆø°ú »ç·ÃÀÇ ¼öÀÇ º¯È­¿¡ ´ëÇÑ ¹Ý»çÀ²ÀÇ º¯È­¿¡ Àû¿ëÇÏ¿© ±×ÀÇ Æ¯¼ºÀ» Á¶»çÇÏ¿´´Ù.
In this study, a finite element model is employed to simulate the diffraction of waves caused by a change of water depths. The model is firstly applied to the estimation of reflection coefficients of monochromatic waves over a sinusoidally varying topography. Predicted coefficients are compared with those of the eigenfunction expansion method and laboratory measurements. A good agreement is observed. The model is then used to investigate effects of heights of bottom topography and number of ripples on variation of reflection coefficients of monocromatic water waves.
 
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ÆÄ¶û;À¯ÇÑ¿ä¼Ò¹ý;Bragg ¹Ý»ç;°íÀ¯ÇÔ¼öÀü°³¹ý;»ç·Ã;water wave;finite element method;Bragg reflection;eigenfunction expansion method;seabed ripple;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.35, no.6, 2002³â, pp.677-684
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200211921477152)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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