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冲击是机载电子设备面临的多种严酷力学环境考验之一。在冲击试验中,某机载电子设备的安装板铆钉多处发生断裂失效。文中应用Abaqus有限元软件对该电子设备进行了瞬态动力学仿真,准确复现了铆钉断裂的位置和安装板变形,并找到了铆钉断裂的具体原因,进一步提出了增强安装板前缘和用不锈钢螺钉替代铆钉的改进建议。接着,对改进后的模型进行了二次仿真。结果表明,改进后的电子设备结构能够满足机载冲击环境要求。文中针对机载电子设备铆钉断裂提出的结构改进建议对同类电子设备的结构设计具有一定的借鉴意义。
Shock is one of the many rigorous mechanics environmental challenges airborne electronics faces. In the impact test, a number of rivets on the mounting board of an airborne electronic device failed in failure. Abaqus finite element software was used to simulate the transient transient dynamics of the electronic equipment, which accurately reproduced the position of the rivet and the deformation of the mounting plate. The causes of the rivet fracture were found out. The leading edge of the mounting plate and the stainless steel Screw replacement rivet improvement suggestions. Then, the second simulation of the improved model. The results show that the improved electronic equipment structure can meet the requirements of airborne impact environment. In this paper, the proposed structure improvement proposed for rupture of airborne electronic equipment has some reference to the structural design of similar electronic equipment.