Atiyah 0 Report post Posted October 23, 2021 Greetings. I really seek for your guidance. Currently, I'm doing my degree final year project. I need to optimize the hull form to get low resistance without changing the displacement and wetted surface area. I already optimized my geometry to get the best minimum coefficient resistance. I need to maintain the displacement and wetted surface area for the geometry. I use the lackenby method. But, after optimizing the geometry, I achieved the minimum total resistance, but the new hull I obtained had a higher displacement and wetted surface, compared to the original hull form. How can I optimize without any changes to displacement? I hope someone can help me. Share this post Link to post Share on other sites
Mr. Claus Abt 14 Report post Posted October 25, 2021 Hi Atiyah, Short question, why would you want to keep the wetted surface area? Best regards Claus Share this post Link to post Share on other sites
Atiyah 0 Report post Posted October 27, 2021 Hi Mr Claus, Actually the objective is to keep constant displacement and to get minimum resistance. I expect that the optimum hull should be more smaller and tapered at the forward part, and a bit bigger at aft part. But what i get after optimize is not as expected and every geometry after optimize is not have significant different from the existing hull. Here i attached the comparison of existing and optimum hull. The yellow line is the optimum hull. Share this post Link to post Share on other sites