{"id":695013,"date":"2024-08-08T06:34:50","date_gmt":"2024-08-08T05:34:50","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=695013"},"modified":"2024-08-08T06:34:50","modified_gmt":"2024-08-08T05:34:50","slug":"phan-tich-rung-dong-do-xoay-gay-ra","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/phan-tich-rung-dong-do-xoay-gay-ra\/","title":{"rendered":"Ph\u00e2n t\u00edch rung \u0111\u1ed9ng do xo\u00e1y g\u00e2y ra"},"content":{"rendered":"<p class=\"sidekick\">Ph\u00e2n t\u00edch rung \u0111\u1ed9ng do xo\u00e1y g\u00e2y ra: Gi\u1ea3i th\u00edch hi\u1ec7n t\u01b0\u1ee3ng rung \u0111\u1ed9ng do xo\u00e1y trong c\u00e1c h\u1ec7 th\u1ed1ng nhi\u1ec7t v\u00e0 c\u00e1ch c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 an to\u00e0n.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/phan_tich_rung_dong_do_xoay_gay_ra.png\" alt=\"Ph\u00e2n t\u00edch rung \u0111\u1ed9ng do xo\u00e1y g\u00e2y ra\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>Ph\u00e2n T\u00edch Rung \u0110\u1ed9ng Do Xo\u00e1y G\u00e2y Ra<\/h2>\n<p>Trong l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt nhi\u1ec7t, rung \u0111\u1ed9ng do xo\u00e1y l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng quan tr\u1ecdng c\u1ea7n ph\u00e2n t\u00edch v\u00e0 hi\u1ec3u r\u00f5. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n trong c\u00e1c h\u1ec7 th\u1ed1ng c\u00f3 d\u00f2ng ch\u1ea3y ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed, g\u00e2y ra rung \u0111\u1ed9ng kh\u00f4ng mong mu\u1ed1n v\u00e0 c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u0169ng nh\u01b0 tu\u1ed5i th\u1ecd c\u1ee7a thi\u1ebft b\u1ecb.<\/p>\n<h2>Hi\u1ec7n T\u01b0\u1ee3ng Xo\u00e1y V\u00e0 Rung \u0110\u1ed9ng<\/h2>\n<p>Hi\u1ec7n t\u01b0\u1ee3ng xo\u00e1y (vortex) x\u1ea3y ra khi lu\u1ed3ng ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed t\u1ea1o th\u00e0nh c\u00e1c d\u00f2ng xo\u00e1y cu\u1ed9n, th\u01b0\u1eddng do g\u1eb7p ph\u1ea3i v\u1eadt c\u1ea3n ho\u1eb7c thay \u0111\u1ed5i \u0111\u1ed9t ng\u1ed9t trong c\u1ea5u tr\u00fac d\u00f2ng ch\u1ea3y. C\u00e1c v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m d\u00f2ng ch\u1ea3y qua c\u00e1nh qu\u1ea1t, \u1ed1ng d\u1eabn, ho\u1eb7c xung quanh c\u00e1c c\u1ea5u tr\u00fac n\u1ed5i tr\u00ean m\u1eb7t n\u01b0\u1edbc. Khi xo\u00e1y n\u00e0y h\u00ecnh th\u00e0nh v\u00e0 t\u00e1ch ra kh\u1ecfi v\u1eadt c\u1ea3n, n\u00f3 s\u1ebd t\u1ea1o th\u00e0nh m\u1ed9t chu\u1ed7i xung l\u1ef1c tu\u1ea7n ho\u00e0n, d\u1eabn \u0111\u1ebfn rung \u0111\u1ed9ng.<\/p>\n<h2>Nguy\u00ean Nh\u00e2n C\u1ee7a Rung \u0110\u1ed9ng Do Xo\u00e1y<\/h2>\n<ul>\n<li><strong>D\u00f2ng Ch\u1ea3y Qua V\u1eadt C\u1ea3n:<\/strong> Khi ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed di chuy\u1ec3n qua v\u1eadt c\u1ea3n nh\u01b0 c\u00e1nh qu\u1ea1t ho\u1eb7c c\u1ea5u tr\u00fac n\u1ed5i, n\u00f3 t\u1ea1o ra c\u00e1c v\u00f9ng \u00e1p su\u1ea5t th\u1ea5p v\u00e0 xo\u00e1y.<\/li>\n<li><strong>Thay \u0110\u1ed5i \u0110\u1ed9t Ng\u1ed9t C\u1ee7a C\u1ea5u Tr\u00fac D\u00f2ng Ch\u1ea3y:<\/strong> C\u00e1c thay \u0111\u1ed5i \u0111\u1ed9t ng\u1ed9t trong c\u1ea5u tr\u00fac \u0111\u01b0\u1eddng \u1ed1ng ho\u1eb7c thi\u1ebft b\u1ecb c\u0169ng c\u00f3 th\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng t\u01b0\u01a1ng t\u1ef1.<\/li>\n<li><strong>T\u1ea7n S\u1ed1 T\u1ef1 Nhi\u00ean C\u1ee7a H\u1ec7 Th\u1ed1ng:<\/strong> N\u1ebfu t\u1ea7n s\u1ed1 c\u1ee7a c\u00e1c xo\u00e1y n\u00e0y g\u1ea7n v\u1edbi t\u1ea7n s\u1ed1 t\u1ef1 nhi\u00ean c\u1ee7a h\u1ec7 th\u1ed1ng, hi\u1ec7n t\u01b0\u1ee3ng c\u1ed9ng h\u01b0\u1edfng c\u00f3 th\u1ec3 x\u1ea3y ra, l\u00e0m t\u0103ng bi\u00ean \u0111\u1ed9 c\u1ee7a rung \u0111\u1ed9ng.<\/li>\n<\/ul>\n<h2>C\u00f4ng Th\u1ee9c Ph\u00e2n T\u00edch<\/h2>\n<p>\u0110\u1ec3 ph\u00e2n t\u00edch rung \u0111\u1ed9ng do xo\u00e1y, ta th\u01b0\u1eddng s\u1eed d\u1ee5ng l\u00fd thuy\u1ebft Strouhal, v\u1edbi c\u00f4ng th\u1ee9c c\u01a1 b\u1ea3n:<\/p>\n<p><em>St = \\frac{fL}{U}<\/em><\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ol>\n<li><em>St<\/em> l\u00e0 s\u1ed1 Strouhal (kh\u00f4ng c\u00f3 \u0111\u01a1n v\u1ecb)<\/li>\n<li><em>f<\/em> l\u00e0 t\u1ea7n s\u1ed1 c\u1ee7a rung \u0111\u1ed9ng (Hz)<\/li>\n<li><em>L<\/em> l\u00e0 \u0111\u1eb7c tr\u01b0ng chi\u1ec1u d\u00e0i c\u1ee7a v\u1eadt c\u1ea3n (m)<\/li>\n<li><em>U<\/em> l\u00e0 t\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y (m\/s)<\/li>\n<\/ol>\n<p>Th\u00f4ng qua vi\u1ec7c x\u00e1c \u0111\u1ecbnh s\u1ed1 Strouhal v\u00e0 t\u1ea7n s\u1ed1 c\u1ee7a d\u00f2ng ch\u1ea3y, k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c t\u1ea7n s\u1ed1 c\u1ee7a rung \u0111\u1ed9ng v\u00e0 \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 nguy hi\u1ec3m c\u1ee7a hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y.<\/p>\n<h2>\u1ee8ng D\u1ee5ng Th\u1ef1c Ti\u1ec5n<\/h2>\n<ul>\n<li><strong>C\u00f4ng Nghi\u1ec7p H\u00e0ng Kh\u00f4ng:<\/strong> Rung \u0111\u1ed9ng do xo\u00e1y c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1nh qu\u1ea1t, g\u00e2y ra ti\u1ebfng \u1ed3n v\u00e0 gi\u1ea3m hi\u1ec7u su\u1ea5t.<\/li>\n<li><strong>C\u00f4ng Nghi\u1ec7p H\u00f3a Ch\u1ea5t:<\/strong> C\u00e1c \u0111\u01b0\u1eddng \u1ed1ng v\u00e0 thi\u1ebft b\u1ecb x\u1eed l\u00fd ch\u1ea5t l\u1ecfng c\u1ea7n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 tr\u00e1nh hi\u1ec7n t\u01b0\u1ee3ng rung \u0111\u1ed9ng c\u00f3 h\u1ea1i.<\/li>\n<li><strong>Ng\u00e0nh K\u1ef9 Thu\u1eadt \u0110i\u1ec7n:<\/strong> Qu\u1ea1t l\u00e0m m\u00e1t v\u00e0 c\u00e1c thi\u1ebft b\u1ecb c\u00e1nh qu\u1ea1t kh\u00e1c c\u1ea7n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u00e0 ki\u1ec3m tra \u0111\u1ec3 tr\u00e1nh rung \u0111\u1ed9ng v\u00e0 ti\u1ebfng \u1ed3n kh\u00f4ng mong mu\u1ed1n.<\/li>\n<\/ul>\n<h2>Bi\u1ec7n Ph\u00e1p Kh\u1eafc Ph\u1ee5c<\/h2>\n<p>Vi\u1ec7c kh\u1eafc ph\u1ee5c rung \u0111\u1ed9ng do xo\u00e1y bao g\u1ed3m m\u1ed9t s\u1ed1 bi\u1ec7n ph\u00e1p sau:<\/p>\n<ul>\n<li><strong>Thi\u1ebft k\u1ebf l\u1ea1i h\u00ecnh d\u1ea1ng v\u1eadt c\u1ea3n:<\/strong> \u0110\u1ec3 gi\u1ea3m thi\u1ec3u s\u1ef1 h\u00ecnh th\u00e0nh c\u1ee7a xo\u00e1y.<\/li>\n<li><strong>S\u1eed d\u1ee5ng b\u1ed9 gi\u1ea3m ch\u1ea5n:<\/strong> \u0110\u1ec3 gi\u1ea3m bi\u00ean \u0111\u1ed9 rung \u0111\u1ed9ng.<\/li>\n<li><strong>\u0110i\u1ec1u ch\u1ec9nh t\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y:<\/strong> \u0110\u1ec3 tr\u00e1nh hi\u1ec7n t\u01b0\u1ee3ng c\u1ed9ng h\u01b0\u1edfng.<\/li>\n<\/ul>\n<p>B\u1eb1ng c\u00e1ch hi\u1ec3u r\u00f5 hi\u1ec7n t\u01b0\u1ee3ng rung \u0111\u1ed9ng do xo\u00e1y v\u00e0 \u00e1p d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p kh\u1eafc ph\u1ee5c ph\u00f9 h\u1ee3p, ch\u00fang ta c\u00f3 th\u1ec3 t\u0103ng c\u01b0\u1eddng hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng k\u1ef9 thu\u1eadt nhi\u1ec7t.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ph\u00e2n t\u00edch rung \u0111\u1ed9ng do xo\u00e1y g\u00e2y ra: Gi\u1ea3i th\u00edch hi\u1ec7n t\u01b0\u1ee3ng rung \u0111\u1ed9ng do xo\u00e1y trong c\u00e1c h\u1ec7 th\u1ed1ng nhi\u1ec7t v\u00e0 c\u00e1ch c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 an to\u00e0n.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[132],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Ph\u00e2n t\u00edch rung \u0111\u1ed9ng do xo\u00e1y g\u00e2y ra<\/title>\n<meta name=\"description\" content=\"Ph\u00e2n t\u00edch rung \u0111\u1ed9ng do xo\u00e1y g\u00e2y ra: Gi\u1ea3i th\u00edch hi\u1ec7n t\u01b0\u1ee3ng rung \u0111\u1ed9ng do xo\u00e1y trong c\u00e1c h\u1ec7 th\u1ed1ng nhi\u1ec7t v\u00e0 c\u00e1ch c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 an to\u00e0n.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.thermal-engineering.org\/vi\/phan-tich-rung-dong-do-xoay-gay-ra\/\" \/>\n<meta property=\"og:locale\" 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