通过分析座舱盖在各个不同抛放阶段的受力关系 ,并着重考虑了抛放过程中气动系数的修正和铆钉剪切的影响 ,最终建立了座舱盖抛放轨迹的预测模型。该模型可广泛用于预测不同型号座舱盖在各种飞行状态下的抛放轨迹。算例表明计算结果与实验数据一致 ,证明了模型的实用性和有效性 By analyzing the force of cockpit cover at different stages of throwing and focusing on the correction of the aerodynamic coefficient and the shearing of rivets in the process of throwing, the forecasting model of canopy trajectory is established. The model can be widely used to predict different types of canopy in a variety of flight trajectory. The example shows that the calculated result agrees with the experimental data, which proves the practicability and validity of the model