为了适应液体火箭发动机组合件试车振动与脉冲载荷大、空间尺寸变化大、试验参数调整幅度大及热环境复杂等特点,组合件的试车架需要在复杂力热环境下具备快速调整能力,提出了一种发动机组合件试车架的数字化设计方法,该方法包括了虚拟装配与三维设计、模块化组件设计,可靠性设计及优化设计等内容。利用Pro-E三维建模实现了虚拟装配,确保支撑结构的合理可靠; 模块化设计方法的应用提高了设计效率与结构快速适应性; 结构强度计算应用有限元静态仿真及模态分析方法,解决了快速脉冲及振动载荷环境下的可靠性设计; 通过一维搜索优化设计方法,解决了热管道支撑结构的优化设计。该方法已应用于液体火箭发动机某滚控装置的试车架设计中,同时为类似形式组合件试验试车架设计提供了参考。
In order to adapt the characteristics of great impulse and vibration load, large space dimension variation, large adjustment range of test parameters, and complex thermal environment, which may appear in the test of liquid rocket engine components, the test frame must be able to adjust quickly at complex mechanical and thermal enviroment. A digitization design method of the test frame for engine component test is proposed in this paper, which includes virtual assembly and 3D design, modular component design, reliability design and optimization design. The virtual assembly is realized by Pro-E 3D modeling to ensure that the supporting structure is resonable and reliable.. The application of the digitization design method improved the design efficiency and fast adaptability of the structure. The static finite element stimulation and modal analysis are adopted for structure intensity calculation to realize the reliability design in the environment of fast impulse and vibration load. The optimization design for the bracing structure of the heat pipe is implemented by the method of one-dimensional searchingoptimization design. This method has been successfully used in the design of test frame for engine component test, which also provides a reference for designing test frame for similar engine components
