一种基于应变能的捆绑火箭主捆绑位置结构优化方法

A structural optimization method for the position of a strap-on launch vehicle based on the strain energy

捆绑火箭的主捆绑位置设计是一项复杂的总体设计项目,涉及传力路径优化、主捆绑结构设计、箭体吊装和支撑设计等。传力路径优化能够在火箭的结构设计中提高箭体结构的利用效率,进而提高火箭的运载能力系数。采用梁单元火箭模型,通过互换主捆绑和捆绑连杆的位置,计算各个主要工况下梁单元模型的应变能。通过应变能的对比,反映不同主捆绑位置下梁单元模型中结构效率的优劣。梁单元模型可以采用常见的商业有限元软件实现。对比结果可为捆绑火箭的主捆绑位置总体设计提供参考。

The selection of the main strap-on position of the strap-on launch vehicle is a complex design content, involving the optimization of the force transmission path, the main strap-on structure design, hoisting and support. The optimization of the force transmission path can improve the utilization efficiency of the structure in the structural design of the launch vehicle, thereby increass the carrying capacity coefficient. In this paper, the beam element launch vehicle model is used to calculate the total strain energy of the beam element model under each main working condition by changing the positions of the main strap-on and strap-on links. Through the comparison of strain energy, it reflects the advantages of the structural efficiency in the beam element model at different main strap-on positions. The beam element model can be realized by common commercial finite element software. The comparison results provide a reference for the design of the main strap-on position of the strap-on launch vehicle.