The concept of generalized event tree is put forward.The model of Generalize d Event Tree Analysis (GETA) is set up based on multi-value logic and set theor y .

• 针对工程系统中普遍存在的反馈关系，提出了广义多态事件树的概念，利用多值逻辑及集合理论，建立了广义多态事件树的数学模型。