{"id":403027,"date":"2024-12-31T04:58:47","date_gmt":"2024-12-31T04:58:47","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/added-mass-effect-on-natural-frequencies\/"},"modified":"2024-12-31T04:58:47","modified_gmt":"2024-12-31T04:58:47","slug":"added-mass-effect-on-natural-frequencies","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/added-mass-effect-on-natural-frequencies\/","title":{"rendered":"Added mass effect on natural frequencies"},"content":{"rendered":"<p>&lt;div class=&#8221;flex-shrink-0 flex flex-col relative items-end&#8221;&gt;&lt;div&gt;&lt;div class=&#8221;pt-0&#8243;&gt;&lt;div class=&#8221;gizmo-bot-avatar flex h-8 w-8 items-center justify-center overflow-hidden rounded-full&#8221;&gt;&nbsp;&lt;\/div&gt;&lt;\/div&gt;&lt;\/div&gt;&lt;\/div&gt;&lt;div class=&#8221;group\/conversation-turn relative flex w-full min-w-0 flex-col agent-turn&#8221;&gt;&lt;div class=&#8221;flex-col gap-1 md:gap-3&#8243;&gt;&lt;div class=&#8221;flex max-w-full flex-col flex-grow&#8221;&gt;&lt;div class=&#8221;min-h-8 text-message flex w-full flex-col items-end gap-2 whitespace-normal break-words text-start [.text-message+&amp;]:mt-5&#8243; dir=&#8221;auto&#8221; data-message-author-role=&#8221;assistant&#8221; data-message-id=&#8221;16f49b58-03dd-4818-8e29-ac9b8b6d6581&#8243; data-message-model-slug=&#8221;gpt-4o&#8221;&gt;&lt;div class=&#8221;flex w-full flex-col gap-1 empty:hidden first:pt-[3px]&#8221;&gt;&lt;div class=&#8221;markdown prose w-full break-words dark:prose-invert light&#8221;&gt;&lt;p&gt;I am performing a modal analysis on a pipe structure with the following simplified case:&lt;\/p&gt;&lt;p&gt;A cylindrical pipe is partially submerged in water (half-dipped), with water flowing through it. The pipe is 1 meter in length, has an outer diameter of 100 mm, and a wall thickness of 4 mm. The material density of the pipe is 7800 kg\/m&sup3;.&lt;\/p&gt;&lt;p&gt;I do not want to model the water directly in my simulation. Could you please explain how to account for and calculate the added water mass (both inside and outside the pipe) for this analysis?&lt;\/p&gt;&lt;\/div&gt;&lt;\/div&gt;&lt;\/div&gt;&lt;\/div&gt;&lt;\/div&gt;&lt;\/div&gt;<\/p>\n","protected":false},"template":"","class_list":["post-403027","topic","type-topic","status-publish","hentry","topic-tag-added-mass-modal-analysis","topic-tag-natural-frequency"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/added-mass-effect-on-natural-frequencies\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Added mass effect on natural frequencies | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/added-mass-effect-on-natural-frequencies\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2024-12-31T04:58:47+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2024-12-31T04:58:47+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Added mass effect on natural frequencies | Ansys Learning Forum\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/added-mass-effect-on-natural-frequencies\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"position\":2,\"name\":\"Topics\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/natural-frequency\\\/#listItem\",\"name\":\"natural-frequency\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/natural-frequency\\\/#listItem\",\"position\":3,\"name\":\"natural-frequency\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/natural-frequency\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/added-mass-effect-on-natural-frequencies\\\/#listItem\",\"name\":\"Added mass effect on natural frequencies\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/added-mass-effect-on-natural-frequencies\\\/#listItem\",\"position\":4,\"name\":\"Added mass effect on natural frequencies\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/natural-frequency\\\/#listItem\",\"name\":\"natural-frequency\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/added-mass-effect-on-natural-frequencies\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/added-mass-effect-on-natural-frequencies\\\/\",\"name\":\"Added mass effect on natural frequencies | Ansys Learning Forum\",\"inLanguage\":\"en-US\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/added-mass-effect-on-natural-frequencies\\\/#breadcrumblist\"},\"datePublished\":\"2024-12-31T04:58:47+00:00\",\"dateModified\":\"2024-12-31T04:58:47+00:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"inLanguage\":\"en-US\",\"publisher\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"Added mass effect on natural frequencies | Ansys Learning Forum","description":"","canonical_url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/added-mass-effect-on-natural-frequencies\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/added-mass-effect-on-natural-frequencies\/#breadcrumblist","itemListElement":[{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","position":1,"name":"Home","item":"https:\/\/innovationspace.ansys.com\/forum","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","name":"Topics"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","position":2,"name":"Topics","item":"https:\/\/innovationspace.ansys.com\/forum\/topics\/","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/natural-frequency\/#listItem","name":"natural-frequency"},"previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","name":"Home"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/natural-frequency\/#listItem","position":3,"name":"natural-frequency","item":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/natural-frequency\/","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/added-mass-effect-on-natural-frequencies\/#listItem","name":"Added mass effect on natural frequencies"},"previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","name":"Topics"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/added-mass-effect-on-natural-frequencies\/#listItem","position":4,"name":"Added mass effect on natural frequencies","previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/natural-frequency\/#listItem","name":"natural-frequency"}}]},{"@type":"Organization","@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization","name":"Ansys Learning Forum","description":"Ansys Innovation Space","url":"https:\/\/innovationspace.ansys.com\/forum\/"},{"@type":"WebPage","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/added-mass-effect-on-natural-frequencies\/#webpage","url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/added-mass-effect-on-natural-frequencies\/","name":"Added mass effect on natural frequencies | Ansys Learning Forum","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/added-mass-effect-on-natural-frequencies\/#breadcrumblist"},"datePublished":"2024-12-31T04:58:47+00:00","dateModified":"2024-12-31T04:58:47+00:00"},{"@type":"WebSite","@id":"https:\/\/innovationspace.ansys.com\/forum\/#website","url":"https:\/\/innovationspace.ansys.com\/forum\/","name":"Ansys Learning Forum","description":"Ansys Innovation Space","inLanguage":"en-US","publisher":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization"}}]},"og:locale":"en_US","og:site_name":"Ansys Learning Forum | Ansys Innovation Space","og:type":"article","og:title":"Added mass effect on natural frequencies | Ansys Learning Forum","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/added-mass-effect-on-natural-frequencies\/","article:published_time":"2024-12-31T04:58:47+00:00","article:modified_time":"2024-12-31T04:58:47+00:00","twitter:card":"summary_large_image","twitter:title":"Added mass effect on natural frequencies | Ansys Learning Forum"},"aioseo_meta_data":{"post_id":"403027","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"limit_modified_date":false,"created":"2025-10-19 10:48:28","updated":"2025-10-19 10:48:28","ai":null,"breadcrumb_settings":null,"seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\/topics\/\" title=\"Topics\">Topics<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/natural-frequency\/\" title=\"natural-frequency\">natural-frequency<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tAdded mass effect on natural frequencies\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/innovationspace.ansys.com\/forum"},{"label":"Topics","link":"https:\/\/innovationspace.ansys.com\/forum\/topics\/"},{"label":"natural-frequency","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic-tag\/natural-frequency\/"},{"label":"Added mass effect on natural frequencies","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/added-mass-effect-on-natural-frequencies\/"}],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27791"],"_bbp_topic_id":["403027"],"_bbp_subscription":["495266","58821"],"_bbp_author_ip":["202.142.173.197"],"_bbp_last_reply_id":["403080"],"_bbp_last_active_id":["403080"],"_bbp_last_active_time":["2024-12-31 12:55:17"],"_bbp_reply_count":["1"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["495266","58821"],"_btv_view_count":["953"],"_bbp_topic_status":["unanswered"]},"test":"zeeshan-aliksb-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/403027","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/403027\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=403027"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}