Aiming at the impact resistance of aeroengine casing with bolted flanges,the evaluation indexes applicable to casing containment in existing studies were summarized and compared.The evaluation index of bolt energy density was proposed.The effect of the geometric parameters of the bolt connection structure on its impact resistance was studied considering two evaluation indexes,namely the bolt internal energy ratio and the bolt energy density.The feasibility and rationality of using bolt energy density as the evaluation index were verified through data comparison.The results show that with the increase of the flange height,the bolt diameter,and the number of bolts,the bolt internal energy ratio decreases gradually.With the increase of the casing thickness,the bolt internal energy ratio shows a trend of first decreasing and then increasing,which is inconsistent with the actual situation.The flange height,the bolt diameter,the number of bolts,and the casing thickness are negatively correlated with the bolt energy density.Taking bolt energy density as the evalua-tion index in the numerical simulation can better reflect the impact resistance of bolted structures and have higher efficiency.
关键词
机匣包容性/螺栓连接/抗冲击/螺栓能量密度/航空发动机
Key words
casing containment/bolt connection/impact resistance/bolt energy density/aeroengine
维普
万方数据