升力鳍伺服系统非定常水动力特性的研究

重点研究了升力鳍升力及转矩与鳍角的非定常水动力特性。通过对鳍升力和转矩的非定常水动力特性试验数据的分析,提出了升力鳍系统的鳍角与升力的换算关系应建立在非定常水动力的基础上。以Theodorsen理论为基础,利用水动力试验数据,修正了基于Theodorsen理论的计算升力系数的公式,提出了修正的升力转矩非定常水动力的数学模型,经实例计算仿真结果与水池试验结果比较,验证了该数学模型的正确性。利用该数学模型直接计算升力,可以省去复杂的、可靠性低、误差大的升力测量装置及复杂的升力计算。该研究也进一步充实了升力鳍非定常水动力特性的理论研究,解决了升力计算的问题。

Research on Unsteady Hydrodynamic Characteristics of the Servo System of Lift Fin Stabilizer

The unsteady hydrodynamic characteristics of the lift and moment of lift fin with fin angle is mainly studied in the paper. By analyzing the experimental data of fin unsteady hydrodynamic characteristics it is considered that the conversion relation of the fin angles and lifts should be based on unsteady hydrodynamics forces. By applying the experimental data, the fin hydrodynamic coefficients computed with Theodorsen theory were corrected and a mathematical model of modified unsteady hydrodynamics lift/moment is presented in the paper. The comparison of simulation and test results proves the model is correct and can be used for the calculation of lift fin stabilizer's hydrodynamic characteristics.