航空发动机软壁风扇机匣包容性研究

高强度纤维缠绕增强的软壁机匣是大型航空发动机轻质风扇机匣的主要选型之一。针对大型航空发动机软壁包容机匣的总体设计思路,从结构特点、数值分析技术、试验方法、纤维性能考核等方面研究了其包容性分析设计的方法。分析了软壁风扇包容机匣的结构特点,较适用于工程、机理分析地连续介质模型和纱线模型,得出了旋转打靶试验能有效考虑关键因素,而部件包容试验则能初步验证包容能力,数值仿真与部件试验相结合能快速掌握软壁机匣的包容性设计方法。此外,软壁机匣外层纤维织物的拉伸、剪切、摩擦、应变率效应、抗老化测试等性能测试,可为选取优良的纤维织物以及发展适用的材料模型提供参考和依据。

Investigation on Containment of Aeroengine Soft-Wall Fan Case

Metal case wrapped by fabric, called soft-wall fan case, is one of mostly light fan cases. Aiming at overall design idea of large aeroengine soft-wall fan case, the design method of containment analysis was investigated from the aspects of structural characteristics, numerical analysis, test method, and fiber properties. The structure characteristic was analyzed, which adapted to the continuum model for engineering analysis and the yarn model for mechanism analysis. The rotating impact tests can effectively consider the key factors and the component containment tests can make an initial validation. The design method of soft-wall case containment was quickly mastered by the combination numerical simulation with experimental evaluation. Tension tests, shear tests, friction tests, strain rate effect tests and aging tests can provide references for choosing good fabrics and developing a proper material model.