On the dynamical load of flexible rocket vehicle with misalignment

Abstract

In this paper, dynamical loads of fin-stabilized, uncontrolled, non-spinning, flexible rocket vehicle with some misalignment such as initial deformation of body are analyzed. As the lateral load due to misalignment can be considered to be quasi-steady, the loads are derived from the solution of steady state analyses. The equations are quite similar to those for divergence analysis except the terms of disturbance forces. Therefore, the divergence phenomenon is considered to be a special case of quasi-steady load problems. Then the design limit on the bending rigidity of the vehicle body can be determined by this theory. The analysis has proved that there exists some tendency that the load on single staged high performance vehicle is quite sensitive to the misalignment. And simple formulas for estimating the load by use of the body parameters have been derived.