{"id":55090,"date":"2022-06-17T17:00:42","date_gmt":"2022-06-17T22:00:42","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/piezo-ceramics-how-can-damping-be-explained\/"},"modified":"2025-01-21T07:25:36","modified_gmt":"2025-01-21T12:25:36","slug":"piezo-ceramics-how-can-damping-be-explained","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/piezo-ceramics-how-can-damping-be-explained\/","title":{"rendered":"Gi\u1ea3i th\u00edch hi\u1ec7n t\u01b0\u1ee3ng gi\u1ea3m ch\u1ea5n trong g\u1ed1m \u00e1p \u0111i\u1ec7n"},"content":{"rendered":"<p>G\u1ed1m \u00e1p \u0111i\u1ec7n l\u00e0 v\u1eadt li\u1ec7u c\u00f3 kh\u1ea3 n\u0103ng chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc th\u00e0nh n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.  T\u00ednh ch\u1ea5t \u0111\u1eb7c bi\u1ec7t n\u00e0y cho ph\u00e9p ch\u00fang \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 c\u1ea3m bi\u1ebfn, b\u1ed9 truy\u1ec1n \u0111\u1ed9ng, m\u00e1y ph\u00e1t \u0111i\u1ec7n, v.v. Tuy nhi\u00ean, dao \u0111\u1ed9ng c\u1ee7a g\u1ed1m \u00e1p \u0111i\u1ec7n th\u01b0\u1eddng \u0111i k\u00e8m v\u1edbi hi\u1ec7n t\u01b0\u1ee3ng damping (suy gi\u1ea3m), l\u00e0m gi\u1ea3m hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a thi\u1ebft b\u1ecb. Hi\u1ec3u r\u00f5 c\u01a1 ch\u1ebf damping trong g\u1ed1m \u00e1p \u0111i\u1ec7n l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t v\u00e0 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a ch\u00fang.<\/p>\n<h3>C\u00e1c c\u01a1 ch\u1ebf damping trong g\u1ed1m \u00e1p \u0111i\u1ec7n<\/h3>\n<p>Damping trong g\u1ed1m \u00e1p \u0111i\u1ec7n l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng ph\u1ee9c t\u1ea1p, ch\u1ecbu \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec1u y\u1ebfu t\u1ed1 kh\u00e1c nhau. C\u00f3 th\u1ec3 ph\u00e2n lo\u1ea1i c\u00e1c c\u01a1 ch\u1ebf damping ch\u00ednh th\u00e0nh ba nh\u00f3m: damping n\u1ed9i t\u1ea1i, damping do ma s\u00e1t v\u00e0 damping do m\u00f4i tr\u01b0\u1eddng.<\/p>\n<h3>Damping n\u1ed9i t\u1ea1i<\/h3>\n<p>Damping n\u1ed9i t\u1ea1i xu\u1ea5t ph\u00e1t t\u1eeb c\u1ea5u tr\u00fac tinh th\u1ec3 c\u1ee7a v\u1eadt li\u1ec7u. Khi g\u1ed1m \u00e1p \u0111i\u1ec7n dao \u0111\u1ed9ng, n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc b\u1ecb chuy\u1ec3n \u0111\u1ed5i th\u00e0nh nhi\u1ec7t n\u0103ng do s\u1ef1 chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a c\u00e1c nguy\u00ean t\u1eed v\u00e0 khuy\u1ebft t\u1eadt trong m\u1ea1ng tinh th\u1ec3. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 damping \u0111i\u1ec7n m\u00f4i.<\/p>\n<h3>Damping do ma s\u00e1t<\/h3>\n<p>Damping do ma s\u00e1t x\u1ea3y ra \u1edf c\u00e1c b\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac gi\u1eefa c\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a thi\u1ebft b\u1ecb, v\u00ed d\u1ee5 nh\u01b0 gi\u1eefa g\u1ed1m \u00e1p \u0111i\u1ec7n v\u00e0 v\u1ecf b\u1ecdc. Ma s\u00e1t l\u00e0m ti\u00eau hao n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc v\u00e0 t\u1ea1o ra nhi\u1ec7t.<\/p>\n<h3>Damping do m\u00f4i tr\u01b0\u1eddng<\/h3>\n<p>M\u00f4i tr\u01b0\u1eddng xung quanh c\u0169ng \u0111\u00f3ng g\u00f3p v\u00e0o damping c\u1ee7a g\u1ed1m \u00e1p \u0111i\u1ec7n. V\u00ed d\u1ee5, khi g\u1ed1m \u00e1p \u0111i\u1ec7n dao \u0111\u1ed9ng trong kh\u00f4ng kh\u00ed ho\u1eb7c ch\u1ea5t l\u1ecfng, n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc b\u1ecb ti\u00eau hao do ma s\u00e1t v\u1edbi m\u00f4i tr\u01b0\u1eddng. Ngo\u00e0i ra, nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m c\u0169ng c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn damping.<\/p>\n<h3>C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn damping<\/h3>\n<p>B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y t\u00f3m t\u1eaft c\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn damping trong g\u1ed1m \u00e1p \u0111i\u1ec7n:<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Y\u1ebfu t\u1ed1<\/th>\n<th>M\u00f4 t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Th\u00e0nh ph\u1ea7n v\u1eadt li\u1ec7u<\/td>\n<td>C\u00e1c t\u1ea1p ch\u1ea5t v\u00e0 ph\u1ee5 gia trong v\u1eadt li\u1ec7u g\u1ed1m \u00e1p \u0111i\u1ec7n c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn damping n\u1ed9i t\u1ea1i.<\/td>\n<\/tr>\n<tr>\n<td>Nhi\u1ec7t \u0111\u1ed9<\/td>\n<td>Damping th\u01b0\u1eddng t\u0103ng theo nhi\u1ec7t \u0111\u1ed9.<\/td>\n<\/tr>\n<tr>\n<td>T\u1ea7n s\u1ed1<\/td>\n<td>Damping ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1 dao \u0111\u1ed9ng.<\/td>\n<\/tr>\n<tr>\n<td>Bi\u00ean \u0111\u1ed9 dao \u0111\u1ed9ng<\/td>\n<td>Damping t\u0103ng theo bi\u00ean \u0111\u1ed9 dao \u0111\u1ed9ng.<\/td>\n<\/tr>\n<tr>\n<td>\u00c1p su\u1ea5t<\/td>\n<td>\u00c1p su\u1ea5t m\u00f4i tr\u01b0\u1eddng c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn damping.<\/td>\n<\/tr>\n<tr>\n<td>M\u00f4i tr\u01b0\u1eddng<\/td>\n<td>Damping trong kh\u00f4ng kh\u00ed, ch\u1ea5t l\u1ecfng v\u00e0 ch\u00e2n kh\u00f4ng kh\u00e1c nhau.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3m damping<\/h3>\n<p>C\u00f3 nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ec3 gi\u1ea3m damping trong g\u1ed1m \u00e1p \u0111i\u1ec7n, bao g\u1ed3m:<\/p>\n<ul>\n<li>T\u1ed1i \u01b0u h\u00f3a th\u00e0nh ph\u1ea7n v\u1eadt li\u1ec7u: S\u1eed d\u1ee5ng v\u1eadt li\u1ec7u c\u00f3 \u0111\u1ed9 tinh khi\u1ebft cao v\u00e0 ki\u1ec3m so\u00e1t ch\u1eb7t ch\u1ebd c\u00e1c t\u1ea1p ch\u1ea5t.<\/li>\n<li>Thi\u1ebft k\u1ebf c\u1ea5u tr\u00fac: T\u1ed1i \u01b0u h\u00f3a h\u00ecnh d\u1ea1ng v\u00e0 k\u00edch th\u01b0\u1edbc c\u1ee7a g\u1ed1m \u00e1p \u0111i\u1ec7n \u0111\u1ec3 gi\u1ea3m thi\u1ec3u ma s\u00e1t.<\/li>\n<li>Ki\u1ec3m so\u00e1t m\u00f4i tr\u01b0\u1eddng: S\u1eed d\u1ee5ng m\u00f4i tr\u01b0\u1eddng ch\u00e2n kh\u00f4ng ho\u1eb7c m\u00f4i tr\u01b0\u1eddng c\u00f3 \u0111\u1ed9 nh\u1edbt th\u1ea5p.<\/li>\n<li>S\u1eed d\u1ee5ng l\u1edbp ph\u1ee7: Ph\u1ee7 l\u00ean b\u1ec1 m\u1eb7t g\u1ed1m \u00e1p \u0111i\u1ec7n m\u1ed9t l\u1edbp v\u1eadt li\u1ec7u c\u00f3 h\u1ec7 s\u1ed1 ma s\u00e1t th\u1ea5p.<\/li>\n<\/ul>\n<p>Vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1c c\u01a1 ch\u1ebf damping v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn n\u00f3 l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 thi\u1ebft k\u1ebf v\u00e0 ch\u1ebf t\u1ea1o c\u00e1c thi\u1ebft b\u1ecb \u00e1p \u0111i\u1ec7n hi\u1ec7u qu\u1ea3.  B\u1eb1ng c\u00e1ch ki\u1ec3m so\u00e1t v\u00e0 gi\u1ea3m thi\u1ec3u damping, ch\u00fang ta c\u00f3 th\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb \u00e1p \u0111i\u1ec7n, t\u1eeb \u0111\u00f3 n\u00e2ng cao hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c trong nhi\u1ec1u \u1ee9ng d\u1ee5ng kh\u00e1c nhau.  Vi\u1ec7c nghi\u00ean c\u1ee9u v\u00e0 ph\u00e1t tri\u1ec3n c\u00e1c v\u1eadt li\u1ec7u v\u00e0 k\u1ef9 thu\u1eadt m\u1edbi nh\u1eb1m gi\u1ea3m damping trong g\u1ed1m \u00e1p \u0111i\u1ec7n v\u1eabn l\u00e0 m\u1ed9t l\u0129nh v\u1ef1c nghi\u00ean c\u1ee9u \u0111ang \u0111\u01b0\u1ee3c quan t\u00e2m v\u00e0 ph\u00e1t tri\u1ec3n.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>G\u1ed1m \u00e1p \u0111i\u1ec7n l\u00e0 v\u1eadt li\u1ec7u c\u00f3 kh\u1ea3 n\u0103ng chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc th\u00e0nh n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. T\u00ednh ch\u1ea5t \u0111\u1eb7c bi\u1ec7t n\u00e0y cho ph\u00e9p ch\u00fang \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 c\u1ea3m bi\u1ebfn, b\u1ed9 truy\u1ec1n \u0111\u1ed9ng, m\u00e1y ph\u00e1t \u0111i\u1ec7n, v.v. Tuy nhi\u00ean, dao \u0111\u1ed9ng c\u1ee7a g\u1ed1m<\/p>\n","protected":false},"author":1,"featured_media":1238,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-55090","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","prodpage-classic"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/55090","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/comments?post=55090"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/55090\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/1238"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=55090"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=55090"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=55090"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}