What optimisation techniques are used for optimising Hull forms for resistance

[Mr. SUMIT CHAVAN 0]

What optimisation techniques are used for optimising Hull forms for resistance?

[Mr. Daehwan Park 1]

Hi Sumit,

 

1. Sobol + Tsearch

 

In the case the user wants to learn the design space, 'Sobol' could be the first option. Sobol does not have approaching mechanism toward minimum or maximum but distributes the values of design variables most fairly. User could have a good perspective that how much each of design variable influences to objective. Selecting the most effective design variables, user can reduce the number of design variables and therefore the computation time. 

 

Practically the best design from Sobol could be chosen as a final result if it is agreed among the design participants. When user wants to go further for searching minimum point, TSearch can starts from the point of Sobol to find out smaller point.

 

 

2. Response surface method (RSM) from Dakota

 

When user does not need to learn design space and has to start optimization directly, Dakota RSM would be a good option to choose. RSM approaches quickly to minimum point avoiding folling down in a local minimum. Tsearch could be an option but it imposes always the possibility to fall in the local minimum point.

 

 

Best regards
Daehwan