
ÃÊÁ¤¹Ð Áøµ¿ | °ÇÃ౸Á¶¹° Áøµ¿ | ±â°è¼³ºñ Áøµ¿ | ¼ÒÀ½À½Çâ | ¹è°üÁøµ¿ | ¸Æµ¿ | »ýȰÁøµ¿±âÁØ
¹è°ü Áøµ¿Çؼ® ¹× ´Ù¾çÇÑ ¿£Áö´Ï¾î¸µ Áøµ¿
¹è°ü ³» À¯Ã¼°¡ È带 °æ¿ì, ¹è°ü ºÒ¿¬¼Ó(Pipe Discontinuity) ±¸°£ÀÇ ±âÇÏÇÐÀû Çü»ó¿¡ µû¶ó ³·ù(Turbulence)°¡ ¹ß»ýÇÕ´Ï´Ù. ³·ù¿¡ ÀÇÇÑ ¹è°üÀÇ À¯Ã¼ À¯¹ß Áøµ¿(Flow Induced Vibration, FIV)À» °ËÅäÇϱâ À§ÇÑ Á¤·®ÀûÀÎ Æò°¡¸¦ ¼öÇàÇϰí ÀÖ½À´Ï´Ù.
¶ÇÇÑ, Áøµ¿ Á¦¾î¸¦ À§ÇÑ ¹è°ü ¼³°è °ËÅä·Î ¹è°üÀÇ °íÀ¯Áøµ¿¼ö(Natural Frequency) ¹× Support À§Ä¡, Áøµ¿ ÁøÆø(Vibration Amplitude)¿¡ ´ëÇÑ Çϸð´Ð ÇØ¼®(Harmonic Analysis) µîÀ» ¼öÇàÇϰí ÀÖ½À´Ï´Ù.
1. À¯Ã¼ À¯¹ß ³·ù (Flow induced turbulence, Fiv)
¹è°ü ³» À¯Ã¼°¡ È带 °æ¿ì, ¹è°ü ºÒ¿¬¼Ó(Pipe Discontinuity) ±¸°£ÀÇ ±âÇÏÇÐÀû Çü»ó¿¡ µû¶ó ³·ù(Turbulence)°¡ ¹ß»ýÇÕ´Ï´Ù. À̳ÊÅϽº(INERTANCE)¿¡¼´Â ³·ù¿¡ ÀÇÇÑ ¹è°üÀÇ À¯Ã¼ À¯¹ß Áøµ¿(Flow Induced Vibration, FIV)À» °ËÅäÇϱâ À§ÇÑ Á¤·®ÀûÀÎ Æò°¡¸¦ Energy Institute Guideline¿¡ µû¶ó ¼öÇàÇϰí ÀÖ½À´Ï´Ù. ¶ÇÇÑ, Áøµ¿ Á¦¾î¸¦ À§ÇÑ ¹è°ü ¼³°è °ËÅä·Î ¹è°üÀÇ °íÀ¯Áøµ¿¼ö(Natural Frequency) ¹× Support À§Ä¡, Áøµ¿ ÁøÆø(Vibration Amplitude)¿¡ ´ëÇÑ Çϸð´Ð ÇØ¼®(Harmonic Analysis) µîÀ» ¼öÇàÇϰí ÀÖ½À´Ï´Ù.
* °ü·ÃŰ¿öµå: ¹è°ü Áøµ¿(Pipe Vibration), °íÀ¯Áøµ¿¼ö (Natural Frequency), LOF (Likelihood of Failure), ³·ù (Turbulence)
2. ¿öÅÍ ÇØ¸Ó, ¼Áö
¼Áö ¾Ð·Â (Surge Pressure), ¹ëºê °³Æó (Valve Close), ÆßÇÁ º´·Ä ¿îÀü (Pump Parallel Operation), °úµµ »óÅ (Transient Condition)
Ç÷£Æ® °øÀåÀÇ ÆßÇÁ(Pump)ÀÇ °¡µ¿ ¹× ÁßÁö, ¹ëºê(Valve) °³Æó¿¡ µû¸¥ °øÁ¤ Á¶°ÇÀÇ º¯È(Transient condition)°¡ ¹ß»ýÇÏ´Â Á¶°Ç¿¡¼ ¹è°ü ½Ã½ºÅÛÀÇ ¼Áö ÇØ¼®(Surge Analysis) ¶Ç´Â ¼öÃæ°Ý(Water Hammer) ÇØ¼®À» °ËÅäÇϰí ÀÖ½À´Ï´Ù. À̳ÊÅϽº(INERTANCE)¿¡¼´Â ÆÄÀÌÇÁ¶óÀÎ(Pipeline), ¼Ò¹æ ³×Æ®¿öÅ©, ³Ã°¢¼ö ¹è°ü µî¿¡ ´ëÇÑ ¼öÇÐÀû ¸ðµ¨À» ÀÛ¼ºÇϰí, °úµµ »óÅÂ(Transient Condition)¿¡ µû¸¥ ¼Áö ¾Ð·Â(Surge Pressure) º¯È¸¦ Æò°¡Çϰí ÀÖ½À´Ï´Ù.
* °ü·ÃŰ¿öµå: ¼Áö ÇØ¼®, ¼öÃæ°Ý (Surge Analysis, Water Hammer)
3. À½Çâ À¯¹ß Áøµ¿ (Acoustic Induced Vibration, AIV)
Ç÷£Æ®(Plant) °øÀå ³» ¼³°èµÈ ÄÁÆ®·Ñ ¹ëºê(Control Valve)¿Í ¾ÈÀü¹ëºê(Safety Valve)ÀÇ ÀÛµ¿ ½Ã, ³ôÀº ¼ÒÀ½ÀÌ ¹è°ü ³»ºÎ·Î ¹æÃâµÇ¸ç, ÀÌ·¯ÇÑ °íÁÖÆÄ À½Çâ °¡Áø(High Frequency Acoustic Excitation)°ú ¹è°ü ³» Ç¥¸éÀÇ Áøµ¿ ¸ðµå(Shell Mode)°¡ ÀÏÄ¡ÇÒ °æ¿ì, ¹è°ü ¿ëÁ¢ºÎÀÇ ÇÇ·Î ÆÄ±«(Fatigue Failure) Çö»óÀÌ ¹ß»ýÇÏ°Ô µË´Ï´Ù. À̳ÊÅϽº(INERTANCE)¿¡¼´Â °íÁÖÆÄ À½Çâ °¡Áø¿¡ ´ëÇÑ ¹è°ü Fitting Selection (O-Let) µîÀÇ °ÇÀü¼ºÀ» Æò°¡Çϰí ÀÖ½À´Ï´Ù.
* °ü·ÃŰ¿öµå: ¹è°ü Áøµ¿(Pipe Vibration), À½Çâ ÇÇ·Î(Acoustic Fatigue), Energy Institute, °íÁÖÆÄ À½Çâ °¡Áø (High Frequency Acoustic Excitation)








»ó¼¼ »ç¾÷½ÇÀû º¸±â http://rndpartner.com/a

|