°íÀ¯ÁÖÆļö »êÃâ¹æ¹ý (Natural frequency¸¦ È®ÀÎÇÏ´Â ¹æ¹ý)
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°øÁø(Resonance)Àº °íÀ¯ÁÖÆļö°¡ °Á¦ÁÖÆļö(±â°èȸÀü, À¯Ã¼¹ß»ý, Àü±â¹ß»ýÁÖÆļö µî)¿Í ÁßøµÇ¾î ÁøÆøÀÌ »ó½ÂÇÏ´Â °æ¿ì¸¦ ÀǹÌÇϹǷΠ°íÀ¯Áøµ¿ÁÖÆļö¸¦ ¹Ì¸® ¾Ë¾Æ³»´Â °ÍÀÌ ¼³°è ¹× Trouble shootingÀÇ ÇÙ½ÉÀ̶ó°í Çصµ °ú¾ðÀÌ ¾Æ´Ï´Ù. ÀÌ°ÍÀº ¾ÈÀü¹®Á¦»Ó¸¸ ¾Æ´Ï¶ó Á¦Ç°ÀÇ Ç°Áú°ú ±â°è³ª ±¸Á¶ÀÇ ¼ö¸í¿¡ ¸ðµÎ ÇØ´çÇÏ´Â Áß¿äÇÑ ¼³°è¿ä¼ÒÀÌ´Ù.
°íÀ¯ÁÖÆļö »êÃâ¹æ¹ý(Natural frequency)
¸ÕÀú °íÀ¯ÁÖÆļö¸¦ ¾Ë¾Æ³»´Â ¹æ¹ýÀ¸·Î Á¤Çö ÁÖÆļö(Sine wave)¸¦ sweep °¡Áø¿¡ ÀÇÇÑ ¹æ¹ý°ú Ãæ°Ý ÁÖÆļö¸¦ ÀÌ¿ëÇؼ Broadband°¡ÁøÇÏ´Â ¹æ¹ýÀÌ ÀÖ´Ù. Çö½ÇÀûÀ¸·Î´Â ±â°èÀÇ ¼Óµµ(RPM)¸¦ »ó½Â½ÃÄÑ ½Ã°£-ÁÖÆļö±×·¡ÇÁ(Waterfall)¸¦ ÀÌ¿ëÇÏ´Â ¹æ¹ý°ú Impact test¿¡ ÀÇÇÑ ¹æ¹ý, ±×¸®°í ÄÄÇ»ÅÍ ½Ã¹Ä·¹À̼Ç(FEM)¿¡ ÀÇÇÑ »êÃâ¹æ¹ýÀÌ ¸¹ÀÌ »ç¿ëµÇ°í ÀÖ´Ù. ¹°·Ð, ½ÇÇè¿¡ ÀÇÇÑ Çؼ®ÀÌ ½Ã¹Ä·¹À̼ÇÇؼ®º¸´Ù Á¤È®ÇÏ°í ¿ì¼±ÇÑ´Ù. ½ÇÇèÇÒ ¼ö ¾øÀ» °æ¿ì(¹°Ã¼°¡ Å« °æ¿ì)¿¡ ½Ã¹Ä·¹ÀÌ¼Ç Çؼ®À» ÁÖ·Î »ç¿ëÇÏ°í ½ÇÇèÀÌ ÀüÁ¦·Î µÈ ¼³°è¼öÁ¤ÀÛ¾÷¿¡ ¸Å¿ì ÀûÀýÇÑ ¹æ¹ýÀÌ´Ù. °íÀ¯ÁÖÆļö¸¦ ¾Ë¾Æ³»´Â ÀÀ¿ë¹æ¹ýµéÀ» Á¤¸®ÇÏ¸é ´ÙÀ½°ú °°´Ù.
1. °¡Áø±â(shaker)¸¦ ÀÌ¿ëÇÏ¿© ÁÖÆļö¸¦ SweepÇÏ´Â ¹æ¹ý(°í°¡ÀÇ ¼³ºñ ¹× ºÎ´ë½Ã¼³ ÇÊ¿ä)
2. Impact °¡Áø(Force sensor hammer, Bump test, Running negative averaging)
3. Speedº¯¼Ó °¡Áø, À§Çè¼Óµµ ºÐ¼®(Bode, Nyquist, Waterfall, Polar plot)
°íÀ¯ÁÖÆļö¸¦ ÃøÁ¤ÇÏ´Â ¹æ¹ý¿¡´Â ¼¾¼ ¼±Á¤ºÎÅÍ ¹Ì¸® ÁغñÇÏ°í ¾Ë°í ÀÖ¾î¾ß ÇÒ »çÀüÁö½ÄÀÌ ¸¹ÀÌ ¿ä±¸µÈ´Ù. ±¸Á¶ÀÇ ´ë·«ÀûÀÎ °íÀ¯¹æÇ⼺(ºñƲ¸²Æ÷ÇÔ)ÆľÇ, ±×·¡ÇÁ¸¦ Àд ¹æ¹ý, °¡ÁøÀÇ ½Ç¼ö¿ä¼Ò, °¡Áø TipÀÇ ¼±ÅÃ, AveragingȽ¼ö, À§»ó(Phase)ÀÇ º¯È, ±â¿©µµ È®ÀÎ(Coherence), Sampling µîÀÌ´Ù. °íÀ¯ÁÖÆļö´Â ¿ì¸®°¡ º¸Åë »ý°¢ÇÏ´Â ¾î¶² ±¸Á¶Ã¼(±â°è, ±¸Á¶, ½Ã½ºÅÛ)¿¡¼ ¿¬¼º(Coupling)¿¡ ÀÇÇؼ ¹«ÇÑ´ëÀÇ °íÀ¯ÁÖÆļö°¡ Àç»ý»êµÇ¹Ç·Î ¸ðµÎ¸¦ ¾Ë¾Æ³»´Â °ÍÀÌ ¾Æ´Ï¶ó ³»°¡ ¿øÇÏ´Â ÁÖÆļö´ë¿ªÀÇ ÁÖ¿ä °íÀ¯ÁÖÆļö¸¦ ¾Ë¾Æ³»´Â µ¥ ±× ÃÊÁ¡ÀÌ ÀÖ´Ù´Â °ÍÀÌ Å°¿öµå¶ó°í ÇÒ ¼ö ÀÖ´Ù.
°ü·Ã Tag
| Resonance, °¡Áø, °íÀ¯ÁÖÆļö, Impact test, EMA, Modal test
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Written by BISOPE