摘要断裂叶片对机匣的撞击导致机匣的破坏是航空发动机的失效方式之一。而机匣的主要连接方式为螺栓连接,因此螺栓连接件的合理设置对机匣乃至整个发动机至关重要。叶片冲击机匣的速度越大,所带来的冲击力也越大,本课题主要针对现有实际问题,对机匣连接件部位进行碰撞侵蚀的模拟,并采用ANSYS-LSDYNA建模,模拟法兰边上的螺栓距离机匣不同位置下所能承受的最大冲击力,即叶片的最大速度,最后使用LSPREPOST进行后处理分析,研究机匣,螺栓连接件以及叶片的应力分布,变形情况,能量变化等力学性能,最终给出最优化的螺栓设计方案。33745
关键词 航空发动机 机匣 螺栓连接件 LS-DYNA 毕业论文设计说明书外文摘要
Title Reserch on Impact Resistance of bolted Joint for Aero-Engine Casing
Abstract
The broken blade colliding casing is a main failure form of Aero-engine. A reasonable set of bolted joint is essential to the casing even the whole engine since the main connection of casing is bolted joint. The greater speed the blade colliding casing,the greater force it has.Our project for the existing practical problems,using ANSYS/LS-DYNA to Simulate the collision,Then find the Optimal posion to set the bolted joint,and the maximum speed of the broken blade.at last,we can use LSPREPOST to analysis the change of Von mise stress,shape,energy and other mechanical characteristic.Eventually,we should give the most optimized bolt design.
Keywords Aero-engine Casing Bolted Joint LS-DYNA