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分析火箭在释放过程中的动响应是将牵制释放技术运用到我国大推力火箭中的关键技术之一。采用纵横扭一体化梁模型分析火箭牵制释放动响应,将发射台对火箭的影响简化成相应的载荷和边界条件,采用分段计算的方法,把发射过程分成点火前的静止、点火后的牵制以及释放三阶段,计算了每个牵制点的牵制力变化规律,以及释放过程箭体上不同部位的动响应特点,并建立了相应的三维模型,进行对比论证。结果表明:纵横扭一体化梁模型在分析整体响应特性时模型简单,精度较高,可用于设计前期的初步分析。
It is one of the key technologies to apply the release-containment technology to the large-thrust rocket in China. The longitudinal and torsional integrated beam model is used to analyze the rocket release and release response. The impact of the launch pad on the rocket is simplified to the corresponding load and boundary conditions. The method of section calculation is used to divide the launch process into static before ignition and after ignition And the release of three stages, calculated the containment point of each change of containment force, as well as the release of different parts of the rocket body dynamic response characteristics, and the establishment of the corresponding three-dimensional model for comparative proof. The results show that the model is simple and has high precision in the analysis of the overall response characteristics of the beam-torsion integrated beam model, which can be used in the preliminary analysis of the pre-design phase.