真实形貌薄壁件铆接模型构建及铆接参数影响规律分析

Construction of Riveting Model for Thin-Walled Parts with Real Shape and Analysis of the Influence Law of Riveting Parameters

摘要: 为了提高飞机薄壁件铆接装配的预测精度，本文提出一种真实形貌薄壁件的铆接模型，并针对铆接参数对薄壁件铆接变形的影响问题，通过有限元仿真得到铆接参数对薄壁件铆接变形的影响规律。首先，对单钉的铆接过程进行分析，建立铆接装配力学模型；再基于薄壁件铆接面实测的三维形貌数据，构建具有真实形貌特征的薄壁件三维实体模型；然后通过有限元仿真对比得到真实形貌模型相较于光滑表面模型具有更高的预测精度；最后通过有限元方法研究铆接参数对真实形貌薄壁件变形的影响。

Abstract: In order to improve the prediction accuracy of riveting assembly of thin-walled parts of aircraft, this paper proposes a riveting model of thin-walled parts with real shape, and for the influence of riveting parameters on the deformation of riveted thin-walled parts, and we obtain the influence law of riveting parameters on the deformation of riveted thin-walled parts through finite element simulation. First of all, the riveting process of single nail is analysed to establish the riveting assembly mechanics model; then based on the measured three-dimensional shape data of the riveting surface of the thin-walled parts, the three-dimensional solid model of the thin-walled parts is constructed with the real shape characteristics. Then, the real shape model has a higher prediction accuracy compared with the smooth surface model through finite element simulation. Finally, the influence rule of riveting parameters on the deformation of the real shape of thin-walled parts is investigated through the finite element method.