柔性变形对大长径比弹箭气动特性的影响

The In fluence of Flexible Deformation to Large Fineness Ratio Rockets' Aerodynamic Characteristics

对于现代战争远程打击以及飞行速度的需求,弹箭的长径比逐渐变大,在飞行过程中的柔性变形可能会超过设计所允许的公差。为了得出大长径比弹箭在飞行过程中柔性变形的变化规律,通过数值模拟计算不同振型、不同攻角和不同马赫数下大长径比弹箭的气动特性,得出发生柔性变形时对弹箭的气动特性的影响,然后对比分析不同振型时和刚体模型时弹箭的静稳定储备量,为大长径比弹箭的设计与研究提供相关的理论依据。

Required by long-range strike and fight speed in modem war, the fineness ratio of the rockets is becoming larger and larger and the flexible deformation during the flight may exceed the tolerance allowed by the design. In order to get variation when the rockets＇ flexi- ble deformation happens during the flight, the method of numerical simulation was used to calculate the aerodynamic characteristics of the rocket of the different model of vibrations, angle of attack and Mach number, then the influence on the rockets＇ aerodynamic characteristics when the rockets＇ flexible deformation happens was got. Next, the rockets＇ static stability was contrasted and analyzed with different model of vibrations and rigid model, providing the theoretical basis for the design and research of the large fineness ratio rockets.