摘要
为进一步实现液体运载火箭贮箱箱底结构轻量化,在实际工况的约束下,综合现役箱底的载荷特点(贮箱箱底厚度参数和火箭运行内压值的理论关系),对贮箱箱底的结构进行参数化。提出剩余强度系数作为贮箱箱底的设计载荷指标,结合工况建立了箱底厚度设计准则,剩余强度系数不小于1时满足工程需要,并以此对箱底厚度进行优化。根据设计准则可以建立开口与箱底厚度的关系,更精确的给定设计箱底临界厚度值。建立的箱底厚度设计准则可以对已设计完成的贮箱箱底进行内压承载能力进行验算。运用实际工况数据验证了设计准则的可用性,并提出了旋压型箱底的厚度分区轻量化方法。此外,根据贮箱箱底管路接口、传感器接口各方面输入输出的交互影响,建立了贮箱箱底开口多约束评估模型。通过参数化平台实现方法的具体实用性及自动化建模。结果表明,旋压型箱底的厚度分区轻量化方法可以实现箱底平均减重约30%。参数化平台和自动化建模为提高贮箱箱底设计效率提供了一种新的方法。
To further realize lightweighting of the tank bottom structure of liquid launch vehicle tanks,a parametric approach is proposed by considering the load characteristics of existing tank bottoms(thickness parameters and the theoretical relationship with internal pressure during rocket operation)under actual working conditions.The residual strength coefficient is proposed as a design load index of the storage tank bottom,and a design criterion of the tank bottom thickness is established by combining the working conditions.When the residual strength coefficient is not less than 1,the tank bottom thickness is considered satisfactory,meeting the engineering needs,and the thickness of the tank bottom is optimized based on this criterion.According to the design criterion,the relationship between the opening and the bottom thickness can be established,and the critical thickness value of the bottom of the storage tank can be determined more accurately.The established bottom thickness design criterion can be used to verify the internal pressure bearing capacity of the designed storage tank bottom.The usability of the design criterion is validated by using actual working condition data,and a thickness partitioning and lightweighting method for spinning-type tank bottom is proposed.In addition,a multi-constraint evaluation model for the opening of the tank bottom is established based on the interaction of the inputs and outputs of the piping and sensor interfaces of the tank bottom.The specific practicality of the method and automated modeling are realized through a parametric platform.The results show that the thickness partitioning lightweighting method for spinning-type tank bottoms can realize an average weight reduction of about 30%for tank bottoms.The parametric platform and automated modeling provide a new method to improve the efficiency of storage tank bottoms.
作者
周宁
吴瀚枭
杨海鹏
关威
ZHOU Ning;WU Hanxiao;YANG Haipeng;GUAN Wei(Beijing Institute of Aerospace Systems Engineering,Beijing 100076,China;School of Astronautics,Harbin Institute of Technology,Harbin 150001,China)
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2024年第8期17-23,共7页
Journal of Harbin Institute of Technology
关键词
液体火箭贮箱
箱底厚度设计准则
箱底轻量化
参数化平台
自动化建模
iquid launch vehicle tank
bottom thickness design guidelines
tanks bottom lightweight
parameterized platform
automation modeling
作者简介
通信作者:周宁(1993-),男,工程师;关威(1982—),男,教授,博士生导师,znbike@163.com。
