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Experimental and theoretical evaluation of aluminium deflection due to lightning strikes

机译：雷击引起的铝偏转的实验与理论评价

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This paper focuses on the displacement of aluminum plates subjected to the forces generated by a lightning current in order to compare modelling and experimental results directly. The electromechanical forces produced during lightning strikes can cause catastrophic damage and hence there is a need to understand the performance of existing and new materials under such extreme conditions in order to improve the ability to withstand these forces and minimize damage. Half-meter square 2mm thick aluminum plates were struck with a range of lightning currents from 40kA to 100kA. A computer model using a constant direct current input was used to predict the point of maximum deflection immediately following a strike which was compared to the measured maximum deflection from the corresponding experiment. Both model and experiment demonstrated an approximately linear relationship between maximum deflection and lightning current for aluminum. In addition, the experiment exhibited damped oscillation behavior following the maximum deflection and the extent of this was also related to magnitude of the lightning current. It was also found that, in the experiment, the test sample experienced an additional force, presumed to be due to air pressure, which could be corrected for. Overall, the static model and dynamic experiments showed close agreement with differences likely due to factors in each respective study.
机译：本文侧重于铝板对受雷电流产生的力的位移，以便直接比较建模和实验结果。在雷击期间产生的机电力会导致灾难性的损害，因此需要了解在这种极端条件下现有和新材料的性能，以提高承受这些力并最大限度地减少损坏的能力。半米方形2mm厚的铝板击中40kA至100ka的一系列闪电电流。使用恒定直流输入的计算机型号用于预测击球后立即进行最大偏转点，该击球与来自相应实验的测量的最大偏转相比。模型和实验均在铝的最大偏转和雷电电流之间展示了大致线性关系。此外，实验表现出最大偏转后的阻尼振荡行为，而这的程度也与雷电电流的大小有关。还发现，在实验中，测试样品经历了额外的力，推测是由于气压，这可以校正。总的来说，静态模型和动态实验表明，由于每个相应研究中的因素可能存在密切一致。

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