The Study On Ballistic Influence Of Meteorology And Aerodynamic Force For Long-range Shells And Rockets Under High Altitude

A new accurate exterior trajectory model was studied based on the formertrajectory model considering eccentricity of acceleration of gravity etc. A new methodwas projected to deal with the aerodynamics coefficient during the full trajectory athigh altitude. A new proposal was advanced that the influence of high altitude windsshould be considered in the high altitude standard atmosphere for the wind speedvalue was large at high altitude, Meanwhile, a standard winds model under 80km anda count model of standard atmosphere from 30km to 80km were given. In order tofind the reasons which make the angle of attack keeping long-playing biggish valuesduring the flight trajectory, some studies on taper and swing movement in thenonlinear field are made. In this study, a new viewpoint was advanced that the dampcharacteristic of pitching and yawing of equator damp moment are different, and somemeasures are given to avoid them based on the mechanism. The WKB method wasapplied to get the approximate solution in the angle of attack equation, and thestability analysis was given using WKB method.The results show that the accurate trajectory model is more adapt to thelong-range shells and rockets than the lower trajectory model. It is necessary toestablish the standard winds model in the high altitude standard atmosphere, for it candecrease the error which is caused by the large correction. The several kinds ofultimate taper movement and swing movement can increase the resistance during theflight trajectory which can enlarge the ballistic scatter and even lead to instability.Adagio -change coefficient is beneficial to stability for long-range shells and rocketsto reentry the dense aerosphere, because it can weaken the surge range.