运载火箭结构动特性分析工具的设计与实现

Design and Implementation of Launch Vehicle’s Structural Dynamic Characteristics Analysis Tool

摘要:

运载火箭的结构模型复杂,只有通过开发专用的仿真分析软件,才能高效、便捷的对其开展动力学特性分析；为保证工具建设的实用性,该软件基于航天领域应用广泛的Patran/Nastran软件进行二次开发；针对仿真分析流程,设计实现了运载火箭结构动特性分析工具,涵盖了建模与计算模块、结果后处理模块、模态筛选模块与模型修正模块,并提炼了其中的关键技术；经工程实践表明,工具可提升设计效率,且计算结果准确、通用性与扩展性强,在工程中具备良好的应用价值。

Abstract:

The structural model of launch vehicle is fairly complex, so it is absolutely necessary to develop a special simulation analysis software for its high efficient and convenient analysis on dynamics. To ensure the practical nature on tool design, this software has been developed by Patran/Nastran which is widely used in aerospace applications. In consideration of the simulation analysis process, we have designed and implemented launch vehicle’s structural dynamic characteristics analysis tool with modeling and calculating module, results postprocessing module, mode selecting module and model modifying module. The involved key techniques are also summarized. It is verified by engineering practice that the tool has many advantages including high design efficiency, calculation accuracy, good generality and expansibility, thus provided with effective value in use.