Mechanical Performance Analysis and Experimental Research on High-Pressure Swing Components Assembled in Swing-After-the-Pump Rocket Engine

¹ Beijing Aerospace Propulsion Institute, Beijing, China
² Beijing Aerospace Propulsion Institute, Beijing, China
³ Beijing Aerospace Propulsion Institute, Beijing, China

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Published online: 13 April 2026

Abstract

This paper, based on a combination of numerical analysis and experimental testing methods, conducts a mechanical performance analysis and experimental research on a HighPressure Swing Component for a Swing-After-the-Pump rocket engine. Taking into account the nonlinearities due to material properties, geometric configurations, and boundary conditions, the paper establishes a numerical analysis model for the High-Pressure Swing Component to study its mechanical characteristics. The fatigue life of the High-Pressure Swing Component is assessed using a strain-corrected Manson-Coffin formula. On this basis, a high-pressure swing test is conducted to effectively simulate actual working boundaries and load conditions, and to perform fatigue life testing. By comparing numerical simulation results with experimental data, the validity of the finite element simulation is verified. Additionally, the actual oscillating torque is obtained and the product’s fatigue life is evaluated, providing significant experimental data for the development of the Swing-After-the-Pump rocket engine.