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首页> 美国政府科技报告 >Investigation of Factors Which Contribute to the Mallaunch of Free Rockets.
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Investigation of Factors Which Contribute to the Mallaunch of Free Rockets.

机译：影响自由火箭爆发的因素探析。

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Results of an investigation concerned with evaluating factors which contribute to the mallaunch of free rockets are reported. Modifications to a previously developed digital computer code which simulates the dynamics of a single-round rocket/launcher, from the time the rocket is at rest on the launcher until it impacts, are described. These modifications make the simulation much more realistic. A new 'rigid-constraints' model for a single-round rocket/launcher system is described and vector/matrix methods are used to obtain matrix ordinary differential equations which govern the system's motion. A digital computer code which implements the numerical solution of these equations is included. Both codes (modified and new) are very general and provide for modeling the effects of launcher motions, rocket dynamic unbalance, thrust malalignment, winds, rocket aerodynamics and variable rocket inertia characteristics. The new code also provides the capability for modeling jet damping and requires less computer time than the modified code. Typical simulation results are presented. Pitch data from two free rocket test flights are compared with simulation results. It is concluded that dynamic unbalance and/or thrust malalignment affected the motions of the two rockets considered, but that other factors of uncertain origin were also presented. Recommendations for further study are made. (Author)

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