摘要
缩比模型试验是获取大型运载火箭动特性的一种有效途径,其中一项重要内容是动力学缩比模型设计。以某型运载火箭为原型对象,根据其结构组成分别推导各部件的相似关系;利用横向刚度和质量相似系数的一致性,联立形成了运载火箭横向动特性相似关系;考虑实际加工制造条件,分析了横向刚度和质量相似系数的约束;根据上述相似关系和相似系数约束设计了1/5缩比模型,并对该缩比模型的动特性相似进行有限元数值计算验证。验证结果表明,设计所得1/5缩比模型在动特性方面与原型具有较高的相似性,相关方法能够有效应用于运载火箭的动力学缩比模型设计。
The design of dynamic scale model is one of the most important parts in the scale model test which is an effective approach to obtain dynamic characteristics of large launch vehicle. Taking the launch vehicle as the object, the similarity relationships for each part were derived on the basis of the structural components of the launch vehicle. Transverse dynamic similarity relationships of the launch vehicle were derived by taking advantage of the consistent similarity in respect of transverse stiffness and mass. Taking the actual processing and manufacturing conditions into consideration, the restrictions of similarity coefficient for transverse stiffness and mass were analyzed. According to the relationships and the restrictions above, a 1/5 dynamic scale model was designed and its similarity of dynamic characteristics was verified through the numerical analysis of finite element. The verification result shows that the 1/5 scale model gets a high-level similarity with the prototype in terms of dynamic characteristics, and the method can be effectively applied to the design of dynamic scale model for launch vehicle.
作者
刘财芝
唐国金
周利霖
LIU Caizhi TANG Guojin ZHOU Lilin(College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073 , China Beijing Astronautics Systems Engineering Institute, Beijing 100076, China)
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2017年第2期27-31,共5页
Journal of National University of Defense Technology
基金
国家自然科学基金资助项目(11472003)
关键词
运载火箭
相似理论
缩比模型
动力学特性
launch vehicle
similitude theory
scale model
dynamic characteristics
