弹体梁模型截面弯矩响应缩比相似关系分析  

Relationship between section moment responses of different scaled beams

作　　者：王在铎[1] 马斌捷[2] 王建民[2] 高庆 洪良友[2] 

机构地区：[1]海军驻中国运载火箭技术研究院军事代表室,北京100076 [2]北京强度环境研究所,北京100076 [3]北京临近飞行器系统工程研究所,北京100076

出　　处：《强度与环境》2014年第3期1-7,共7页Structure & Environment Engineering

摘　　要：通过分析不同缩比模型在工程中的应用条件,利用相似理论和工程梁模型,对导弹发射过程的动态响应与截面载荷做了相似条件研究和模态参数对载荷相似性的影响分析,指出对于动态位移和截面弯矩需要不同振型阶次的相似要求,工程经验和实际算例表明载荷相似需要二到三阶的模态参数相似,提出了可用于发射过程移动载荷分析的缩比模型弱相似条件及质量分布修正方法。The precondition of applying scaled models in engineering was analyzed in this paper. Similar condition was studied for dynamic response and section load during launch of a missile, based on similar theory and engineering beam theory. And how modal parameters affect load similarity was deduced also. The result shows that number of mode similarity need was different in order to make dynamic displacement or section moment similar between different models. Engineering experience and numerical calculation indicate that two or three mode is needed for the sake of load similarity. Scaled mode＇s design request was proposed. The design request was aimed at make scaled mode suitable for analyze moving external force during launch of a missile.

关 键 词：缩比模型 动力相似 弹射试验 截面弯矩 模态参数 

分 类 号：V415[航空宇航科学与技术—航空宇航推进理论与工程]