气锤冲击作用下含螺栓连接组合结构加速度响应研究

发布时间：2018-05-06 18:21

本文选题：螺栓连接 + 组合结构　；参考：《兵器装备工程学报》2016年04期

【摘要】：为了获得组合结构在高过载环境中的加速度响应规律,进行了气锤过载冲击实验,得到带螺栓连接组合结构不同位置的加速度响应,并使用ABAQUS有限元软件对实验动态冲击过程进行仿真研究,验证了数值仿真的可靠性。利用验证的有限元模型对高过载环境中螺栓预紧力、气锤冲击速度对组合结构不同位置加速度的影响进行仿真分析。结果表明螺栓预紧力较小时,组合结构对加速度"削弱"明显,当1#和2#位置螺栓预紧力达到10 k N和15 k N时,组合结构对加速度"削弱"作用减小并趋于稳定;初始冲击速度增加,相邻位置加速度差值增加,差值基本呈线性关系,斜率分别为0.025 66和0.013 57。以上结论为实际工程应用抗过载设计提供参考依据。
[Abstract]:In order to obtain the law of acceleration response of composite structure in high overload environment, the acceleration response of composite structure with bolt connection at different positions was obtained by air hammer overload impact experiment. The ABAQUS finite element software is used to simulate the dynamic impact process of the experiment, which verifies the reliability of the numerical simulation. The effects of bolt pretightening force and air hammer impact velocity on the acceleration of composite structure at different positions in high overload environment were simulated by using the verified finite element model. The results show that when the bolt pretension force is small, the combined structure weakens the acceleration obviously. When the pre-tightening force of the bolt at the positions of 1# and 2# reaches 10 KN and 15 KN, the combined structure decreases and tends to stabilize the acceleration. With the increase of initial impact velocity, the difference of acceleration between adjacent positions increases, and the difference is basically linear, with slopes of 0.025 66 and 0.013 57 respectively. The above conclusions provide a reference for the practical engineering application of anti-overload design.
【作者单位】：南京理工大学智能弹药技术国防重点学科实验室;
【基金】：国家自然科学基金(11402121)
【分类号】：TH131.3

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