Research on response characterstic and dynamic modeling of launch vehicle under the cold launch mode
ZHOU Di
ZHOU Yuanchun
WANG Huijuan
MA Zhangjian
JIANG Shengpeng
Abstract：To accurately simulate the complicated load transfer pattern of the launch device under cold launch mode,the rigid-flexible coupling dynamic simulation method was adopted to analyze the dynamic response of a launch vehicle,the structural strength was also verified.The finite element flexible body was introduced and a multi-rigid-flexible-body dynamic simulation model of a launch vehicle was constructed.Accuracy of the model was verified by the actual launch test.The influence law between the vibration response and stress state of the launch vehicle and the launch angle was further analyzed.The results show that amplitudes of the transmitted load and stress inside the launcher will reduce when the launch angle is close to 90°.The modeling and analysis approaches proposed in this study can effectively support the optimal design of the launch device.
Keywords：Cold launchLaunch vehicleMulti-rigid-flexible-body dynamicSimulationVibration
Publication Date：2025-08-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：7( 101-107 )