复杂三维走向三铰链管路补偿工况下的补偿器角位移研究

Study on Angular Displacements of the Hinged Expansion Joints in a Three-hinge Pipe with Complex Three-dimensional Route in Compensation Working Conditions

为了适应复杂的边界条件,新一代液体运载火箭管路系统中通常使用三铰链管路作为补偿导管。由于三铰链管路的补偿能力取决于铰链补偿器的变形能力,因此在管路设计时需要对给定补偿工况下各补偿器的变形情况进行评估,确保各铰链补偿器的角位移值均在设计允许范围之内。以某型号三铰链增压管为例,分别采用理论计算、有限元仿真以及试验测量3种方法对管路在给定补偿工况下的补偿器角位移进行了评估,研究了复杂三维走向三角链管路产品的补偿特性,并对3种方法结果进行了对比和讨论。

In order to accommodate to complex boundary conditions,the three-hinge pipes are usually used in the pipeline system of a new generation liquid propellant launch vehicle as compensation pipes.The compensation ability of a three-hinge pipe is determined by the deformation ability of the three hinged expansion joints.Therefore,when designing a three-hinge pipe,it is necessary to perform a deformation evaluation of the three hinged expansion joints subject to the prescribed compensation working conditions,and make sure that their angular displacements are within the designed values.This paper takes a real three-hinge self-pressurization pipe as an example and evaluates the angular displacements of its hinged expansion joints through theoretical calculation,Finite Element Method(FEM)simulation,and experimental measurement,respectively.In this paper,compensation characteristic of the self-pressurization pipe is studied and advantages and limitations of the three methods are elaborated.