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带钢在拉弯矫直过程中延伸量的精细化计算 被引量:3
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作者 李伟娜 周存龙 黄庆学 《重型机械》 2012年第5期54-57,共4页
拉弯矫直过程中传统计算带钢延伸率的方法,仅考虑张力回复后的延伸率,忽略带钢在弯曲弹复后的延伸损失,导致延伸率计算值偏大,影响控制精度。本文考虑带钢的残余延伸及在平断面假设下拉伸区的残余变形对中心层延伸的影响,从而提出新的... 拉弯矫直过程中传统计算带钢延伸率的方法,仅考虑张力回复后的延伸率,忽略带钢在弯曲弹复后的延伸损失,导致延伸率计算值偏大,影响控制精度。本文考虑带钢的残余延伸及在平断面假设下拉伸区的残余变形对中心层延伸的影响,从而提出新的计算方法。通过大量的试验结果对比分析,与传统延伸率计算结果相比,新公式计算所得的延伸率计算结果更加接近于试验模拟结果,说明用本文提出的方法设定拉矫过程中的工艺参数将更为精确。 展开更多
关键词 拉弯矫直 弹复 延伸率 中性层偏移 平断面假设
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Prediction Model for Fatigue Stiffness Decay of Concrete Beam Based on Neural Network
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作者 王海超 何世钦 贡金鑫 《Journal of China University of Mining and Technology》 2003年第1期40-42,共3页
With the method of neural network, the processes of fatigue stiffness decreasing and deflection increasing of reinforced concrete beams under cyclic loading were simulated. The simulating system was built with the giv... With the method of neural network, the processes of fatigue stiffness decreasing and deflection increasing of reinforced concrete beams under cyclic loading were simulated. The simulating system was built with the given experimental data. The prediction model of neural network structure and the corresponding parameters were obtained. The precision and results were satisfied and could be used to investigate the fatigue properties of reinforced concrete beams in complex environment and under repeating loads. 展开更多
关键词 neural network fatigue stiffness damage cumulation plane section assumption
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