基于等效梁模型的运载火箭动力学特性仿真预示研究

朴思扬; 朱春艳; 褚福运; 张亚辉

doi:10.21656/1000-0887.400256

基于等效梁模型的运载火箭动力学特性仿真预示研究

doi: 10.21656/1000-0887.400256

¹大连理工大学工业装备结构分析国家重点实验室, 辽宁大连 116024;²上海宇航系统工程研究所, 上海 201108

基金项目: 国家自然科学基金(11672060)；载人航天领域预先研究项目(010101)

详细信息

作者简介:
朴思扬(1992—)，男，博士生(E-mail: siyang_piao@mail.dlut.edu.cn)；朱春艳(1985—)，女，高级工程师(E-mail: zhuchunyan@fudan.edu.cn)；褚福运(1986—)，男，高级工程师(E-mail: chu_fuyun@163.com)；张亚辉(1972—)，男，教授，博士生导师(通讯作者. E-mail: zhangyh@dlut.edu.cn).

中图分类号: V414
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- 被引次数: 0
出版历程
- 收稿日期: 2019-08-30
- 修回日期: 2019-09-18
- 刊出日期: 2020-03-01

Dynamic Characteristics Prediction of Launch Vehicles Based on the Equivalent Beam Model

¹State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian, Liaoning 116024, P.R.China;²Aerospace System Engineering Shanghai, Shanghai 201108, P.R.China

Funds: The National Natural Science Foundation of China(11672060)

摘要

摘要: 针对运载火箭动力学特性仿真预示问题，提出了一种基于等效梁模型，其是可考虑贮箱内液体推进剂影响高效、准确的仿真预示方法.应用等效厚度法建立了运载火箭的等效梁模型，并将运载火箭精细有限元模型的模态分析结果作为目标，通过有限元模型修正提升了等效梁模型的精度.以某型号运载火箭为算例，应用该文方法，建立了其等效梁模型，并基于集中质量法和耦合质量法两种液体推进剂等效方法对其进行了考虑贮箱内液体推进剂影响的动力学特性预测，比较了两种方法的分析结果.
- 运载火箭 /
- 等效梁模型 /
- 液体推进剂 /
- 模型修正 /
- 模型简化
Abstract: An efficient and accurate method was proposed for dynamic characteristics prediction of launch vehicles based on the equivalent beam model, with which the influence of liquid propellants can be considered. The equivalent beam model for the launch vehicle was established based on the cross-sectional area equivalence principle, and improved through model updating against the natural frequencies and mode shapes of the fine finite element model. The present method was validated through computation of a certain type of launch vehicles. A highly representative equivalent beam model for the launch vehicle was established. The dynamic characteristics of the launch vehicle were predicted based on the equivalent beam model under the influence of liquid propellants in 2 ways of the lumped mass method and the coupled mass method, and the results were compared.
- launch vehicle /
- equivalent beam model /
- liquid propellant /
- model updating /
- model reduction

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参考文献(29)

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