摘要
考虑目前钢管混凝土系杆拱桥吊杆的新型施工工艺及其复杂的锚固约束情况,以吊杆的索力值、抗弯刚度和计算长度作为未知参数,分析吊杆频率对各参数的敏感程度,基于参数灵敏度的迭代算法可同时计算出吊杆索力值,抗弯刚度和计算长度。运用该方法对4根不同参数的吊杆数值分析,结果表明该方法不仅有很高的精度,而且还适用于频率值受抗弯刚度影响较大的短吊杆。同时对一座钢管混凝土拱桥的吊杆进行测试分析,证明了该方法实用可行。
Abstract
Taking into account the new construction technique and complex anchorage, The proposed method takes the tension force, flexural rigidity and length as unknown parameters, analyzes the sensitivity of parameters to natural frequencies. The algorithm based on sensitivity-updating is able to simultaneously identify the tension force, flexural rigidity and length. Next, the method is applied to four different hanger rods system, and it is approved that the proposed method not only has high accuracy, but also be applicable to the rods with high bending stiffness. At last, a testing on a CFST tied arch bridge proved the method is field applicable.
关键词
吊杆 /
索力 /
频率 /
抗弯刚度 /
参数灵敏度
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Key words
hanger rod /
cable tension /
frequency /
flexural rigidity /
sensitivity
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陈彦江;程建旗;闫维明;何浩祥;李勇.
基于参数灵敏度分析的吊杆索力识别[J]. 振动与冲击, 2011, 30(7): 256-260
Chen Yan-jiang; Cheng Jian-qi; Yan Wei-ming; He Hao-xiang; Li Yong.
Cable Force Detection Based on Variable Sensitivity Analysis[J]. Journal of Vibration and Shock, 2011, 30(7): 256-260
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脚注
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