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Optimisation of a beam in bending subjected to severe inertia impact loading

机译:承受严重惯性冲击载荷的弯曲梁的优化

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摘要

This paper summarises an optimal analytical study of a bar when it is subjected to shock inertia loading such that the severe bending causes permanent yielding. The findings are related to a practical case study application and help explain the necessary actions that have to be taken to minimise the impact damage. The analysis relates the sudden strain energy which the bar gains following an impact (when either the stationary bar is collected by a body moving with substantial momentum or alternatively when the moving bar is suddenly brought to a halt) and establishes the bending strength as a function of mass, stiffness and other kinematic conditions. The optimal analysis results in a surprising paradox which is borne out in the actual detail design solution to a critical component which had caused major maintenance problems in the braking system of a railed vehicle. The study reveals some interesting findings relating to the best bar configuration in terms of geometrical design, support locations and material choice.
机译:本文总结了钢筋在承受冲击惯性载荷时的最佳分析研究,钢筋剧烈弯曲会导致永久屈服。调查结果与实际案例研究应用相关,有助于解释为最大程度地减少冲击损失而必须采取的必要措施。该分析涉及钢筋在撞击后获得的突然应变能(当静止的钢筋被以较大动量运动的物体收集时,或者当活动的钢筋突然停止时),并根据该函数确定弯曲强度质量,刚度和其他运动学条件。最佳分析导致一个令人惊讶的悖论,这在关键部件的实际详细设计解决方案中得到了证明,该关键部件已在有轨车辆的制动系统中造成了重大的维护问题。该研究揭示了一些有趣的发现,这些发现与最佳的杆配置有关,包括几何设计,支撑位置和材料选择。

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