绳牵引并联支撑弹箭模型气动干扰特性分析

Analysis of aerodynamic interference characteristics of a cable-driven parallel suspension system to a missile model

采用绳牵引并联支撑形式,以Basic Finner标准模型为例,分别针对有绳系、无绳系支撑进行不同迎角、不同马赫数情况下的气动仿真,考虑绳的直径、牵引点位置以及布局方式等因素影响;基于系统动力学方程进行稳定性分析。结果表明:小迎角时,绳系支撑的影响小,最大相对误差为2.06%,但随着迎角增大,绳系影响略有增加;在跨声速范围,马赫数为1时绳系支撑的影响最为突出;绳的直径和布局方式对气动特性影响较大;系统在考虑冲击载荷以及大迎角情况下仍具有较好的稳定性,综合考虑可选择绳索直径较小、反向布置的牵引方式。上述研究结果可为绳牵引并联支撑弹箭模型风洞试验提供技术支撑。

Considering the Basic Finner standard model as an example,the aerodynamic simulation at various angles of attack and Mach numbers is carried out respectively for the cable-driven parallel suspension and no suspension cases.Moreover,the influences of cable diameter,connection point position,and layout are all investigated.Based on the dynamics equations,system stability is analyzed.The conducted simulation shows that the cable-driven suspension has little influence on small-angle attacks,and the maximum relative error is 2.06%,whereas an increase in the angle of attack slightly increases the cable influence.In the transonic velocity range,the cable influence is the most obvious when Mach number is 1;the cable diameter and layout also significantly impact the aerodynamic characteristics;the system can still have good stability when experiencing impulse load at large attack angles.Comprehensively,the driven mode with a smaller cable diameter and reversal arrangement can be a better choice.The above researches can provide the required technical support for missile models with the cable-driven parallel suspension method in wind tunnel tests.