{"id":684377,"date":"2024-10-23T23:29:20","date_gmt":"2024-10-23T22:29:20","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=684377"},"modified":"2024-10-23T23:29:20","modified_gmt":"2024-10-23T22:29:20","slug":"5-phuong-phap-phan-tich-ung-suat-nhiet-trong-ket-cau","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/5-phuong-phap-phan-tich-ung-suat-nhiet-trong-ket-cau\/","title":{"rendered":"5 Ph\u01b0\u01a1ng Ph\u00e1p Ph\u00e2n T\u00edch \u1ee8ng Su\u1ea5t Nhi\u1ec7t Trong K\u1ebft C\u1ea5u"},"content":{"rendered":"<p class=\"sidekick\">5 Ph\u01b0\u01a1ng Ph\u00e1p Ph\u00e2n T\u00edch \u1ee8ng Su\u1ea5t Nhi\u1ec7t Trong K\u1ebft C\u1ea5u: H\u01b0\u1edbng d\u1eabn c\u00e1c c\u00e1ch ti\u1ebfp c\u1eadn ph\u1ed5 bi\u1ebfn \u0111\u1ec3 ph\u00e2n t\u00edch v\u00e0 qu\u1ea3n l\u00fd \u1ee9ng su\u1ea5t nhi\u1ec7t, \u0111\u1ea3m b\u1ea3o an to\u00e0n k\u1ebft c\u1ea5u.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/5_phuong_phap_phan_tich_ung_suat_nhiet_trong_ket_cau.png\" alt=\"5 Ph\u01b0\u01a1ng Ph\u00e1p Ph\u00e2n T\u00edch \u1ee8ng Su\u1ea5t Nhi\u1ec7t Trong K\u1ebft C\u1ea5u\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>5 Ph\u01b0\u01a1ng Ph\u00e1p Ph\u00e2n T\u00edch \u1ee8ng Su\u1ea5t Nhi\u1ec7t Trong K\u1ebft C\u1ea5u<\/h2>\n<p>\u1ee8ng su\u1ea5t nhi\u1ec7t trong k\u1ebft c\u1ea5u l\u00e0 v\u1ea5n \u0111\u1ec1 quan tr\u1ecdng trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t. Hi\u1ec3u r\u00f5 v\u00e0 \u1ee9ng d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n t\u00edch \u1ee9ng su\u1ea5t nhi\u1ec7t s\u1ebd gi\u00fap \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 hi\u1ec7u su\u1ea5t cho c\u00e1c c\u1ea5u tr\u00fac. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 5 ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n t\u00edch \u1ee9ng su\u1ea5t nhi\u1ec7t ph\u1ed5 bi\u1ebfn:<\/p>\n<p><u1><\/p>\n<li>Ph\u00e2n T\u00edch B\u1eb1ng Ph\u01b0\u01a1ng Tr\u00ecnh Nhi\u1ec7t \u0110\u1ed9ng H\u1ecdc<\/li>\n<li>Ph\u00e2n T\u00edch B\u1eb1ng Ph\u00e2n T\u00edch Ph\u1ea7n T\u1eed H\u1eefu H\u1ea1n (FEA)<\/li>\n<li>Ph\u00e2n T\u00edch Tr\u1ea1ng Th\u00e1i \u1ed4n \u0110\u1ecbnh V\u00e0 Kh\u00f4ng \u1ed4n \u0110\u1ecbnh<\/li>\n<li>Ph\u00e2n T\u00edch B\u1eb1ng C\u00e1c Th\u00ed Nghi\u1ec7m Th\u1ef1c T\u1ebf<\/li>\n<li>Ph\u00e2n T\u00edch B\u1eb1ng Ph\u01b0\u01a1ng Ph\u00e1p S\u1ed1<\/li>\n<p><\/u1><\/p>\n<h2>1. Ph\u00e2n T\u00edch B\u1eb1ng Ph\u01b0\u01a1ng Tr\u00ecnh Nhi\u1ec7t \u0110\u1ed9ng H\u1ecdc<\/h2>\n<p>Ph\u01b0\u01a1ng tr\u00ecnh nhi\u1ec7t \u0111\u1ed9ng h\u1ecdc l\u00e0 c\u01a1 s\u1edf cho vi\u1ec7c ph\u00e2n t\u00edch nhi\u1ec7t trong k\u1ebft c\u1ea5u. Nh\u1eefng ph\u01b0\u01a1ng tr\u00ecnh n\u00e0y bao g\u1ed3m c\u00e1c \u0111\u1ecbnh lu\u1eadt nh\u01b0 <i>Q = mc\\Delta{T}<\/i> v\u00e0 giao thoa gi\u1eefa s\u1ee9c n\u00f3ng v\u00e0 s\u1ef1 gi\u00e3n n\u1edf nhi\u1ec7t.<\/p>\n<p><u1><\/p>\n<li>\u0110\u1ecbnh lu\u1eadt Fourier v\u1ec1 truy\u1ec1n nhi\u1ec7t: <i>q = -k \\partial T \/ \\partial x<\/i><\/li>\n<li>\u0110\u1ecbnh lu\u1eadt Hooke cho \u1ee9ng su\u1ea5t v\u00e0 bi\u1ebfn d\u1ea1ng: \\(\\sigma = E \\epsilon\\)<\/li>\n<p><\/u1><\/p>\n<h2>2. Ph\u00e2n T\u00edch B\u1eb1ng Ph\u00e2n T\u00edch Ph\u1ea7n T\u1eed H\u1eefu H\u1ea1n (FEA)<\/h2>\n<p>Ph\u01b0\u01a1ng ph\u00e1p FEA s\u1eed d\u1ee5ng m\u00e1y t\u00ednh \u0111\u1ec3 ph\u00e2n chia m\u1ed9t k\u1ebft c\u1ea5u l\u1edbn th\u00e0nh c\u00e1c ph\u1ea7n t\u1eed nh\u1ecf h\u01a1n (ph\u1ea7n t\u1eed h\u1eefu h\u1ea1n), t\u1eeb \u0111\u00f3 t\u00ednh to\u00e1n nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u1ee9ng su\u1ea5t.<\/p>\n<p><u1><\/p>\n<li>Thi\u1ebft l\u1eadp m\u00f4 h\u00ecnh s\u1ed1 h\u1ecdc c\u1ee7a k\u1ebft c\u1ea5u<\/li>\n<li>T\u00ednh to\u00e1n nhi\u1ec7t \u0111\u1ed9 ph\u00e2n b\u1ed1 v\u00e0 \u1ee9ng su\u1ea5t nhi\u1ec7t<\/li>\n<li>Ki\u1ec3m tra v\u00e0 hi\u1ec7u ch\u1ec9nh m\u00f4 h\u00ecnh d\u1ef1a tr\u00ean k\u1ebft qu\u1ea3 th\u1ef1c nghi\u1ec7m<\/li>\n<p><\/u1><\/p>\n<h2>3. Ph\u00e2n T\u00edch Tr\u1ea1ng Th\u00e1i \u1ed4n \u0110\u1ecbnh V\u00e0 Kh\u00f4ng \u1ed4n \u0110\u1ecbnh<\/h2>\n<p>C\u00f3 hai lo\u1ea1i ph\u00e2n t\u00edch ch\u1ee7 y\u1ebfu: tr\u1ea1ng th\u00e1i \u1ed5n \u0111\u1ecbnh v\u00e0 kh\u00f4ng \u1ed5n \u0111\u1ecbnh. Tr\u1ea1ng th\u00e1i \u1ed5n \u0111\u1ecbnh l\u00e0 khi nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng thay \u0111\u1ed5i theo th\u1eddi gian.<\/p>\n<p><u1><\/p>\n<li>Ph\u00e2n t\u00edch \u1ed5n \u0111\u1ecbnh: \\(\\frac{\\partial T}{\\partial t} = 0\\)<\/li>\n<li>Ph\u00e2n t\u00edch kh\u00f4ng \u1ed5n \u0111\u1ecbnh: \\(\\frac{\\partial T}{\\partial t} \\neq 0\\)<\/li>\n<p><\/u1><\/p>\n<h2>4. Ph\u00e2n T\u00edch B\u1eb1ng C\u00e1c Th\u00ed Nghi\u1ec7m Th\u1ef1c T\u1ebf<\/h2>\n<p>Th\u00ed nghi\u1ec7m th\u1ef1c t\u1ebf gi\u00fap x\u00e1c nh\u1eadn \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n t\u00edch l\u00fd thuy\u1ebft v\u00e0 m\u00f4 ph\u1ecfng.<\/p>\n<p><u1><\/p>\n<li>S\u1eed d\u1ee5ng m\u1eabu th\u1ef1c t\u1ebf \u0111\u1ec3 \u0111o nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u1ee9ng su\u1ea5t<\/li>\n<li>K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m d\u00f9ng \u0111\u1ec3 hi\u1ec7u ch\u1ec9nh m\u00f4 h\u00ecnh l\u00fd thuy\u1ebft<\/li>\n<li>\u0110\u00e1nh gi\u00e1 t\u00ednh kh\u1ea3 thi v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n<\/li>\n<p><\/u1><\/p>\n<h2>5. Ph\u00e2n T\u00edch B\u1eb1ng Ph\u01b0\u01a1ng Ph\u00e1p S\u1ed1<\/h2>\n<p>S\u1eed d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt t\u00ednh to\u00e1n s\u1ed1 nh\u01b0 ph\u01b0\u01a1ng ph\u00e1p Euler ho\u1eb7c Runge-Kutta \u0111\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i to\u00e1n ph\u1ee9c t\u1ea1p v\u1ec1 nhi\u1ec7t.<\/p>\n<p><u1><\/p>\n<li>Ph\u00e2n t\u00edch t\u1ef1 \u0111\u1ed9ng h\u00f3a qua ph\u1ea7n m\u1ec1m<\/li>\n<li>Gi\u1ea3i quy\u1ebft c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh vi ph\u00e2n li\u00ean quan \u0111\u1ebfn nhi\u1ec7t<\/li>\n<li>Cung c\u1ea5p c\u00e1c k\u1ebft qu\u1ea3 nhanh ch\u00f3ng v\u00e0 ch\u00ednh x\u00e1c<\/li>\n<p><\/u1><\/p>\n<h2>K\u1ebft Lu\u1eadn<\/h2>\n<p>\u1ee8ng su\u1ea5t nhi\u1ec7t c\u00f3 th\u1ec3 g\u00e2y ra nh\u1eefng h\u1eadu qu\u1ea3 nghi\u00eam tr\u1ecdng n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t \u0111\u00fang c\u00e1ch. B\u1eb1ng c\u00e1ch hi\u1ec3u v\u00e0 \u00e1p d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n t\u00edch tr\u00ean, ch\u00fang ta c\u00f3 th\u1ec3 thi\u1ebft k\u1ebf v\u00e0 \u0111i\u1ec1u ch\u1ec9nh k\u1ebft c\u1ea5u m\u1ed9t c\u00e1ch an to\u00e0n v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>5 Ph\u01b0\u01a1ng Ph\u00e1p Ph\u00e2n T\u00edch \u1ee8ng Su\u1ea5t Nhi\u1ec7t Trong K\u1ebft C\u1ea5u: H\u01b0\u1edbng d\u1eabn c\u00e1c c\u00e1ch ti\u1ebfp c\u1eadn ph\u1ed5 bi\u1ebfn \u0111\u1ec3 ph\u00e2n t\u00edch v\u00e0 qu\u1ea3n l\u00fd \u1ee9ng su\u1ea5t nhi\u1ec7t, \u0111\u1ea3m b\u1ea3o an to\u00e0n k\u1ebft c\u1ea5u.<\/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\/ 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