组合式螺旋桨重心误差评价与修正

由于桨叶在成形加工过程中受制造精度、材料缺陷及装配误差等非设计因素的影响，导致组合式螺旋桨的实际重心位置与理论设计重心位置不一致，对其力学性能会产生不良影响，因此需要对相关桨叶进行重心误差评价和去重处理以修正重心误差。提出了重心最小包容球和重心公差球的概念和算法，并以此为依据判断桨叶是否需要进行重心修正。同时根据重心组合原理，分别以修正质量最小和桨叶重心离散程度最小为标准，提出了相应的修正方案，并利用理论分析和仿真实验相结合的方法验证了方案的可行性。

Barycenter Error Evaluation and Correction for Modular Marine Propeller

In the process of blade manufacturing, there existed the influences of manufacturing precision, material defects, assembling errors and other non-design factors, which caused the difference between actual position and theoretical position of modular marine propeller barycenters. There would have adverse effects on its mechanical properties. Hence, it was necessary to evaluate the barycenters and remove the weights so as to correct the barycenter position errors of relevant blades. The concepts and the algorithms of minimum containing ball  and removal processing ball were proposed, which could be applied to determine whether the blade needed  to be re-processed. Meanwhile,regarding the barycenter combination, two weight correction solutions were also proposed based on the principles of the minimum amount of correction weight and the minimum dispersion degree of barycenter respectively. In the end, the feasibility of strategy was evaluated by applying theoretical analysis and simulation experiments.