关键词: 兵器科学与技术, 动导数, 滚转, 非定常俯仰, 阻尼力矩, 多翼反坦克导弹

Abstract: The methods of computing the dynamic derivatives are improved to estimate the unsteady aerodynamic characteristics of a multi-wing antitank missile. A quasi-steady state method is applied in computing the roll damping coefficient. The steady state flow is simulated by using sliding mesh technology. The unsteady pitch movement is simulated by using a reduced frequency method. In the movement, a far field velocity boundary condition is forced to oscillate.The computing procedures of roll and pitch damping moments are introduced based on these methods. These methods are applied to predict the dynamic derivatives of standard calibration model and a multi-wing antitank missile. The results indicate that the improved methods described have high accuracy and efficiency for the calculation of dynamic derivatives. And the improved methods are available for engineering applications.

Key words: ordnance science and teohnology, dynamic derivative, roll, unsteady pitch, damping moment, multi-wing antitank missile