{"id":50,"date":"2017-07-27T09:00:55","date_gmt":"2017-07-27T09:00:55","guid":{"rendered":"http:\/\/pafec.kevinit.co.uk\/?page_id=50"},"modified":"2017-08-22T10:34:10","modified_gmt":"2017-08-22T10:34:10","slug":"barrier-analysis","status":"publish","type":"page","link":"https:\/\/pafec.kevinit.co.uk\/index.php\/pafec-vibroacoustics-application-areas\/barrier-analysis\/","title":{"rendered":"Barrier analysis"},"content":{"rendered":"<p>Finite and boundary element techniques can be used to analyse barriers. It is relatively straightforward to predict results for &#8216;ideal conditions&#8217;. However the effectiveness of the barrier will change with wind conditions, and variations in temperature in the surrounding air space will also be difficult to incorporate into the model. A boundary element approach could be used to compare between a number of different designs under &#8216;ideal conditions&#8217;, with the assumption that the best design might also be best in other circumstances.<\/p>\n<h3>Straight rigid barrier at low frequency<\/h3>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" class=\"aligncenter size-full wp-image-271\" src=\"\/wp-content\/uploads\/2017\/08\/stbar2-397x259.gif\" alt=\"\" width=\"397\" height=\"259\" \/><\/p>\n<p>Distributed sound source on left.<\/p>\n<p>The region on the right is shielded by a barrier.<\/p>\n<p>At low frequency diffraction is an important effect.<\/p>\n<p>&nbsp;<\/p>\n<h3>Straight rigid barrier at higher frequency<\/h3>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" class=\"aligncenter size-full wp-image-244\" src=\"\/wp-content\/uploads\/2017\/08\/stbar2-f300-397x259.gif\" alt=\"\" width=\"397\" height=\"259\" \/><\/p>\n<p>&nbsp;<\/p>\n<h3>Complex shape rigid barrier at low frequency<\/h3>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" class=\"aligncenter size-full wp-image-242\" src=\"\/wp-content\/uploads\/2017\/08\/antbar2-f100-397x259.gif\" alt=\"\" width=\"397\" height=\"259\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Finite and boundary element techniques can be used to analyse barriers. It is relatively straightforward to predict results for &#8216;ideal[&#8230;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":28,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/pafec.kevinit.co.uk\/index.php\/wp-json\/wp\/v2\/pages\/50"}],"collection":[{"href":"https:\/\/pafec.kevinit.co.uk\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/pafec.kevinit.co.uk\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/pafec.kevinit.co.uk\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/pafec.kevinit.co.uk\/index.php\/wp-json\/wp\/v2\/comments?post=50"}],"version-history":[{"count":13,"href":"https:\/\/pafec.kevinit.co.uk\/index.php\/wp-json\/wp\/v2\/pages\/50\/revisions"}],"predecessor-version":[{"id":697,"href":"https:\/\/pafec.kevinit.co.uk\/index.php\/wp-json\/wp\/v2\/pages\/50\/revisions\/697"}],"up":[{"embeddable":true,"href":"https:\/\/pafec.kevinit.co.uk\/index.php\/wp-json\/wp\/v2\/pages\/28"}],"wp:attachment":[{"href":"https:\/\/pafec.kevinit.co.uk\/index.php\/wp-json\/wp\/v2\/media?parent=50"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}