ABSTRACT
During operation, a ship is open to dynamic effects resulting from specifics of marine environment. Among these effects, wind dynamic impact together with a wavy motion is especially hazardous for the ship. Therefore, there are applicable criteria, taking the above said situations into consideration, in classification societies’ regulations. A way to calculate a heeling moment originated by the wind operation is given in dynamic stability criteria. One may determine an angle of dynamic heel based on a function of this moment and righting levers’ curve. But, assumptions and simplifications accepted by the classification societies result in omission of some phenomena and the angle of dynamic heel, determined based on theoretical calculations, differs from the real one. Determination of a real value of the dynamic angle of heel is possible by executing model tests performed with geometric and dynamic similarity scale taken into consideration. Results of theoretical calculations and measurements of dynamic angle of heel, executed with a ship model of 888 project type as an example, are given in this elaboration (Lewandowski, 2010). Results of the presented tests allow formulating practical conclusions which may be used by the classification societies, among the others.
