{"id":3622,"date":"2015-02-06T21:20:00","date_gmt":"2015-02-06T21:20:00","guid":{"rendered":"http:\/\/thales.mit.edu\/bush\/?p=3622"},"modified":"2021-04-15T01:55:45","modified_gmt":"2021-04-15T01:55:45","slug":"how-to-build-a-better-shaker","status":"publish","type":"post","link":"https:\/\/thales.mit.edu\/bush\/index.php\/2015\/02\/06\/how-to-build-a-better-shaker\/","title":{"rendered":"Building a better shaker table"},"content":{"rendered":"\n<div class=\"wp-block-cover alignwide has-purple-background-color has-background-dim\"><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\n<div class=\"wp-block-image is-style-twentytwentyone-border\"><figure class=\"alignright size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/thales.mit.edu\/bush\/wp-content\/uploads\/2021\/03\/shaker.png\" alt=\"\" class=\"wp-image-4469\" width=\"386\" height=\"377\"\/><\/figure><\/div>\n\n\n\n<p class=\"tw-text-wide has-extra-small-font-size\">Electrodynamic shakers are widely used in experimental investigations of vibrated fluids and granular materials. However, they are plagued by undesirable internal resonances that can significantly impact the quality of vibration. In this work, we measure the performance of a typical shaker and characterize the influence that a payload has on its performance. We present the details of an improved vibration system based on a concept developed by Goldman (2002) [1] which consists of a typical electrodynamic shaker with an external linear air bearing to more effectively constrain the vibration to a single axis. The principal components and design criteria for such a system are discussed. Measurements characterizing the performance of the system demonstrate considerable improve- ment over the unmodified test shaker. In particular, the maximum inhomogeneity of the vertical vibration amplitude is reduced from approximately 10 percent to 0.1 percent; moreover, transverse vibrations were effectively eliminated.<br><br>See paper: &nbsp;<a href=\"http:\/\/math.mit.edu\/~bush\/wordpress\/wp-content\/uploads\/2015\/01\/Harris-Shaker.pdf\">Harris &amp; Bush (2015)<\/a><\/p>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":4055,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13,3],"tags":[],"class_list":["post-3622","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bouncing-walking","category-pilot-wave-hydrodynamics","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v16.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Building a better shaker table - John W. M. Bush<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/thales.mit.edu\/bush\/index.php\/2015\/02\/06\/how-to-build-a-better-shaker\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Building a better shaker table - John W. M. Bush\" \/>\n<meta property=\"og:url\" content=\"https:\/\/thales.mit.edu\/bush\/index.php\/2015\/02\/06\/how-to-build-a-better-shaker\/\" \/>\n<meta property=\"og:site_name\" content=\"John W. M. 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