{"id":13900,"date":"2020-05-15T05:23:14","date_gmt":"2020-05-15T09:23:14","guid":{"rendered":"https:\/\/blogs.sw.siemens.com\/simcenter\/?p=13900"},"modified":"2026-03-26T06:08:07","modified_gmt":"2026-03-26T10:08:07","slug":"sea-fever-an-ode-to-simcenter-amesim-variable-sea-conditions","status":"publish","type":"post","link":"https:\/\/blogs.sw.siemens.com\/simcenter\/sea-fever-an-ode-to-simcenter-amesim-variable-sea-conditions\/","title":{"rendered":"Sea Fever, an ode to Simcenter Amesim variable sea conditions"},"content":{"rendered":"\n

Poem by John Masefield<\/a> (and Romain Nicolas) <\/p>\n\n\n\n

I must go down to the seas again, to the lonely sea and the sky,
And all I ask is a tall ship and a star to steer her by;
And the wheel\u2019s kick and the wind\u2019s song and the white sail\u2019s shaking,
And a grey mist on the sea\u2019s face, and a grey dawn breaking.<\/em><\/p>\n\n\n\n

I must go down to the seas again, for the call of the running tide
Is a wild call and a clear call that may not be denied;
And all I ask is a windy day with the white clouds flying,
And the flung spray and the blown spume, and the sea-gulls crying.<\/em><\/p>\n\n\n\n

I must go down to my sea model again, to the induced variable resistance,
To the propulsion system\u2019s countless efforts to make the ship advance:
And all I ask is the new Simcenter Amesim 2020.1 release,
And its variable sea conditions model and other fantastic capabilities. <\/strong><\/em><\/p>\n\n\n\n

Well, I\u2019m not sure John Masefield really wrote the\nlast paragraph, but as a true sea lover, he would have been proud of the latest\nmarine-focused Simcenter Amesim features.<\/p>\n\n\n\n

Simcenter Amesim variable sea conditions model<\/h3>\n\n\n\n

Indeed, with Simcenter Amesim 2020.1 comes a much-requested model: variable sea conditions.<\/p>\n\n\n\n

Sizing a ship propulsion system based on calm sea conditions is like training for the Everest climb on a parking lot, or designing a car for flat and straight roads, it is over simplistic (\u201cA smooth sea never made a skillful sailor\u201d as we say).<\/p>\n\n\n\n

So, we worked on adding resistance to the current hull resistance model<\/a> by considering 3 phenomena:<\/p>\n\n\n\n