双偏心螺栓组件力学性能分析研究

Research On Mechanical Characters of Double Eccentric Bolts Assembly

针对多偏心螺栓组件在飞机上的连接需求以及多重偏心状况影响的研究缺失,本研究结合传统偏心螺栓分析步骤与多重偏心极限位置分析与简化方案,提出了一套新型多重偏心螺栓组件分析流程。根据该流程计算分析了某型飞机上双偏心螺栓组件的偏心特性,综合考虑了多种偏心状况对该组件力学性能的影响,并且根据极限应力状况下的工况对结构参数完成了优化分析。结果表明,在小偏心状况下对于结构整体受力影响不显著;在组件大偏心情况下,当组件偏心方向与载荷方向相垂直时偏心结构会出现极限应力状态。该研究充分说明了新型多重偏心螺栓组件分析流程的技术可行性,也为实际的飞机零部件装配提供了较好的参考。

Focusing on the actual needs of aircraft components assembling and the lack of research on multiple eccentric bolts, a new multiple eccentric bolts analysis process is proposed based on traditional single eccentric analysis approach and the optimization plan of limit position. A Double Eccentric Bolts Assembly is analyzed by the new analysis progress, which considers the variety of eccentric condition affecting the mechanical properties of the structure, and optimizes analysis certain structural parameters by the limit stress conditions. The results show that the situation in the small eccentric parameter for the whole structure has no significant effect, while in the case of large eccentricity, when the eccentric direction is perpendicular to the direction of the load, ultimate stress may occur. The study shows that the new analysis process is feasible and available, and thus provides a good reference for actual aircraft components assembling.