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Çѱ¹¼öÀÚ¿øÇÐȸ / v.36, no.3, 2003³â, pp.413-422
°æ»çÁöÇü¿¡¼­ ÆÄ±º¿¡ ÀÇÇØ »ý¼ºµÈ ÀåÆÄÀÇ Bragg ¹Ý»ç
( Bragg Reflection of Long Waves Generated by Short Wave Groups on a Sloping Beach )
Á¤Àç»ó;Á¶¿ë½Ä; ÇѾç´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;ÇѾç´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;
 
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º» ¿¬±¸¿¡¼­´Â Boussinesq ¹æÁ¤½ÄÀ» ÀÌ¿ëÇÏ¿© À¯µµµÈ ÀåÆÄ¸¦ Áö¹èÇÏ´Â ÇÑâÀÇ »ó¹ÌºÐ¹æÁ¤½ÄÀ» ÀÌ¿ëÇÏ¿©, ¿Ï¸¸È÷ º¯ÇÏ´Â ÀÏÁ¤°æ»ç¸éÀÇ Á¤ÇöÆÄÇü ÁöÇü¿¡¼­ÀÇ Bragg ¹Ý»ç¸¦ ÇØ¼®ÇÏ¿´´Ù. ÀÔ»çÆÄ´Â À§»óÀÌ ´Ù¸¥ µÎ ´ÜÆÄÀÇ Áßø¿¡ ÀÇÇØ »ý¼ºµÈ ÆÄ±ºÀ» »ç¿ëÇÏ¿´´Ù. Bragg ¹Ý»ç Á¶°Ç¿¡¼­ ÇØÀúÁöÇüÀÇ °æ»ç°¡ ÀåÆÄÀÇ ¹Ý»ç¿¡ ¹ÌÄ¡´Â ¿µÇâ¿¡ ´ëÇÏ¿© °ËÅäÇÏ¿´À¸¸ç, ÇØÀúÁöÇüÀÇ °æ»ç°¡ Ŭ¼ö·Ï ¹Ý»ç´Â Å©°Ô ³ªÅ¸³µ´Ù. ÀÌ´Â ¼ö½ÉÀÇ °¨¼Ò·Î ÀÎÇØ ºñ¼±Çü¼ºÀÌ Áõ°¡ÇÏ¿´À¸¸ç, ÀÌ·Î ÀÎÇÑ ÆÄ¶ûÀÇ Ãµ¼öÈ¿°ú·Î ÀÔ»çÆÄÀÇ ÆÄ°í°¡ »ó½ÂÇÏ¿©, ¹Ý»ç ¿ª½Ã Å©°Ô ³ªÅ¸³­ °ÍÀ¸·Î ÆÇ´ÜµÈ´Ù.
Numerical analysis for the Bragg reflection due to sinusoidally varying seabeds tying on a sloping beach was performed by using a couple of ordinary differential equations derived from the Boussinesq equations. Incident waves were wane groups generated by two short waves with slightly different phases. Effects of the slope of a seabed to the reflection were investigated in detail. It is shown that the reflection of long waves enhanced by increasing the slope of a seabed. This phenomenon caused by increase of wave amplitude due to increase of nonlinearity and shoaling.
 
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Boussinesq ¹æÁ¤½Ä;ÀåÆÄ;Bragg ¹Ý»ç;Boussinesq equations;long waves;Bragg reflection;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.36, no.3, 2003³â, pp.413-422
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200302612607855)
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