Rocket sleds are essential for dynamic testing of speed and acceleration in aircraft,missiles,and aerospace vehicles.Finite element analysis (FEA) is a critical component in predicting test conditions for successful rocket sled experiments.As the speed of rocket sled tests increases,the accuracy requirements for FEA models also escalate.Consequently,it is necessary to advance the overall modeling techniques of rocket sleds to meet diverse test requirements.To more accurately predict the dynamic response of rocket sled tests,a high-precision model based on thin-walled structures has been developed.The proposed model employs a shell-solid mixed element approach for precise modeling of thin-walled structures and utilizes displacement coordination methods to ensure displacement consistency between shell and solid elements.This methodology ensures the accurate transfer of loads,thereby enhancing the calculation accuracy and stability of the model.Simulation results of high- and low-speed rocket sled operations indicate that the thin-walled structure of mixed elements outperforms the solid element structure in predicting vibration responses.A comparison between experimental and simulation results shows that,within the study range,the model’s error meets test requirements,and its effectiveness and reliability are validated.Thus,modeling with a mixed element thin-walled structure can more accurately predict the dynamic response of rocket sleds.This approach provides critical technical support for the design and optimization of rocket sled structures and is significantly important in enhancing rocket sled capabilities.