内埋式舱门机构作为战斗机的主要部件，对战斗机舱门的隐身性能起到了很大影响。针对先进战斗机带有预变形舱门的内埋式弹舱机构在运动阶段可能产生的阶差问题，本文在建立了内埋式舱门刚柔耦合模型的基础上，对内埋式舱门机构受到的接触力和气动载荷进行分析。在此基础上，为了解决舱门机构精度可靠性分析问题，提出了一种混合不确定下基于符号误判概率的时变可靠性分析方法，进一步提升了舱门机构的可靠性分析效率。首先，推导了符号误判概率的公式，然后建立了一种符号误判概率函数作为学习函数，用于同时更新随机样本、区间样本以及时间节点，通过一个数值算例验证了该方法的准确性和高效性。最后采用该方法计算了内埋式舱门机构在整个运动过程中的时变失效概率的上下界，为舱门机构的安全裕度评估和可靠性设计优化提供了定量依据。

As a key component of fighter aircraft, the embedded cabin door mechanism has a significant impact on the stealth performance of the fighter's cabin door. In order to solve the problem of the step difference that may occur in the movement stage of the embedded cabin door mechanism with pre-deformed cabin door in advanced fighter aircraft, this paper analyzes the contact force and aerodynamic load of the embedded cabin door mechanism based on the established rigid-flexible coupling model of the embedded cabin door. On this basis, in order to solve the problem of accuracy reliability analysis of the cabin door mechanism, a time-dependent reliability analysis method based on symbolic misjudgment probability under hybrid uncertainty was proposed, which further improved the reliability analysis efficiency of the cabin door mechanism. Firstly, the formula of the symbolic misjudgment probability is derived. Then, a symbolic misjudgment probability function is estab-lished as a learning function to simultaneously update random samples, interval samples, and time nodes. The accuracy and efficiency of the method are verified through a numerical example. Finally, the upper and lower bounds of the time-dependent failure probability of the embedded cabin door mechanism throughout the movement process are calculated using this method, providing a quantitative basis for the safety margin assessment and reliability design optimization of the embed-ded cabin door mechanism.