The Study Of Best Pitch Angle On The Semi-planing Ship

Semi-planing Boat not only possesses the advantages of large tonnage of displacement vessels,but also has the advantages of the high speed of planing hulls, so in terms of large tonnage of goods and personnel transport has been widely used.At present, resistance prediction methods of planning (Semi-planing) hulls generally is based on the following categories:Statistics method, Model experiment method and some theoretical methods.In this article, through60meters aluminum alloy rapid response support ship model test,optimization on the resistance performance of Semi-planing Boat were studied. Through model test, resistance, pitch and heave under different loaded conditions,different mode, different speed is studied in this paper,and the best pitch Angle is obtained, slide for the next half of the ship resistance performance study for part of the experimental results.In this paper, the structure of this paper is organized as follows:First, this paper introduces the development status of semi-planing vessels, research status for the study of semi-planing resistance reducing ship and ship method provides an overview of this paper to determine the semi-planing vessel research methods and priorities.Second, this paper introduces the model of the test model, test equipment and measuring instruments, and the model why only under the condition of meet the Reynolds number is equal to test are discussed.Third, this paper introduces two methods of conventional resistance conversion, namely pay Froude method and (1+k) method, and the two methods were used respectively to conversion, conversion of ship model resistance is actually the ship resistance conversion results, identified in this paper, using pay Froude method to conversion.Finally,60meters large aluminum alloy are introduced in this rapid response support ship model in static water resistance test. Under different load conditions,different float state and different speed, ship model experiment was carried out.The experimental results were analyzed, and get the best pitch Angle under different load conditions,and put forward feasible suggestions to the ship...