悬链线理论在“三平”火箭脐带管线长度设计中的应用

采用“三平”测试与发射模式的低温液体火箭一般在起竖托架固定敷设的气、液、电管线接口与箭体对应接口之间设置一段脐带管线,以适应固定管线与箭上接口的相对位置变化量。针对该模式脐带管线的长度设计和载荷分析需求,文章结合火箭发射流程建立了计算模型,利用悬链线理论推导了脐带管线长度设计和受力分析的计算公式,并在此基础上提出了该模式火箭脐带管线长度设计与受力分析的流程、给出了在计算分析中需考虑的因素,为类似产品的设计计算提供参考。

Umbilical lines are widely used in“3-Horizon”launch mode to connect pipelines which are fixed on transporter-erector and plugs or nozzles on vehicle,so as to flexibly adjust their position.In this work a mathematical model has been proposed for length design and load analysis of umbilical lines,formulations for the suspension curve and load calculation a have been derived based on catenary theory.Furthermore,a principle for length design and load analysis have been established and application of it combined with the engineering practice background have been provided,which could provide reference to the designing of similar product in the future.