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乘波体非轴对称、扁平、大长细比的几何外形特点决定了其存在严重的横航向耦合动稳定性问题。目前对乘波体横航向稳定性的研究还相对较少,且一般只针对单一外形,对飞行器设计未能获得有指导意义的定性、定量结论。以幂次乘波体为研究对象,首先引入设计参数kw和φ描述其外形特点,然后结合CFD数值模拟和Kriging代理模型,获得了整个设计参数空间内乘波体的静/动导数,进而通过求解飞行动力学耦合方程特征根获得乘波体的横航向耦合动稳定荷兰滚模态特性。定义了荷兰滚动稳定性导数的概念,推导了荷兰滚阻尼近似表达式,解释了不同攻角下荷兰滚模态发散/收敛的成因,获得了荷兰滚阻尼随设计参数和攻角的分布规律。推导了荷兰滚频率近似表达式,获得了荷兰滚频率随设计参数和攻角的分布规律。
By the wave body non-axisymmetric, flat, large slenderness of the geometric shape determines the characteristics of its existence of a serious problem of transverse-direction coupling dynamic stability. At present, the research on the stability of the transversal navigation by the wave body is relatively few, and it is generally only concerned with a single appearance, which fails to obtain the qualitative and quantitative conclusions of guiding significance for the aircraft design. Firstly, the design parameters kw and φ are introduced to describe their shape characteristics. Then, combining the CFD numerical simulation and the Kriging agent model, the static / dynamic derivatives of the wave body in the whole design parameter space are obtained, Solving the Eigenvalue of the Aerodynamic Coupling Equation Obtaining the Transverse - Navicational Coupling Dynamic Stability of the Dutch Rolling Mode Characteristic of Multiplying Wave Body. The concept of rolling stability derivative in Holland is defined. The approximate expression of rolling damping in Holland is deduced. The causes of divergence / convergence of Dutch rolling mode at different angles of attack are explained. The distribution of Dutch rolling damping with the design parameters and angle of attack is obtained. The approximate expression of the Dutch roll frequency is deduced, and the distribution law of the Dutch roll frequency with the design parameters and the angle of attack is obtained.