Study On The Evaluation Of Barycenter And Weight Removing Balance Of The Large Modular Rotator

In the process of manufacturing, there exist the influences of manufacturing precision, material defects, assembling errors and other non-design factors, which cause the difference between actual barycenter position and theoretical barycenter position.There would have adverse effects on static balance and dynamic balance of large modular rotator, especially.This paper, take modular marine propeller as the object of study, to solve the problem of blade barycenter error evaluation, references to the sphere theory in mathematics, proposes the concepts and the algorithms of the minimum containing ball and removal processing ball. By comparing the spatial relationship of the minimum containing ball and removal processing ball to judge actual barycenter error, provide the balde select strategy when weight removing balance.By analyzing the relationships of the minimum containing ball and boundary points spatial location distribution, proposes the criterias for the minimum containing ball; in terms of the minimum containing ball, this paper proposes five algorithms and procedures. Meanwhile, it proposes the criterion of the minimum containing ball, further, make evaluations of algorithms accuracy, stability and rapidity by means of MATLAB respectively. In terms of removal processing ball, combined with the actual situation of the modular marine propeller, it proposes the design principles of removal processing ball, including the minimum gravity moment principle, the minimum weight removing cost principle and the minimum mount of removing weight principle. and proposes detailed steps of the optimal removal processing ball.For the optimization of weight removing, according to the different situation, it proposes two weight removing solutions based on the principle of the minimum mount of removing weight and the minimum dispersion degree of barycenter respectively. After barycenter correction process, optimize the installation sequence of the blades, and simulation verification based on ADAMS. The results indicate that apply the methods of barycenter error evaluation and weight removing balance, the mechanical properties of modular marine propeller significantly improved. Hence, the methods of barycenter evalution and weight removing balance has important practical significance and considerable technical and economic prospects. Based on the methods this paper proposed, develop the software of mudular marine propeller barycenter error evaluation and weight removing balance, and proposes detailed procedure, By calculated a set of actual modular marine propeller barycenter data, realizes practical engineering application of the software.