索结构索力无线测试系统及应用
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摘要
根据频率法测试拉索内力的原理开发了索结构索力无线测试系统。考虑拉索的弯曲刚度和两端弹性嵌固的边界条件,提出了基于遗传算法的多频率索力计算方法。该方法对索力计算具有较强的通用性和较高的精度,且不依赖基频或某指定阶频率,方便实测应用。利用该方法并结合无线动态测试设备,开发了集成化的索结构索力无线测试系统。系统在某体育馆桅杆斜拉索张拉成型后的索力测试中得到应用,测试过程方便快捷,索力计算结果基本准确。
A wireless cable force measurement system of cable structures was developed depending on the basic principle of frequency method.Considering the influence of the flexural rigidity and elastic embedding on the cable,a multistage frequency method based on the genetic algorithm was proposed.This method is generally applicable to most cables with high precision,and doesn't rely on fundamental frequency or a specified order frequency.Thus it's convenient in practical application.Using this method and wireless dynamic test equipment,a integrative wireless cable force measurement system of cable structures was developed.The system was used in the cable force measurement of a stadium's mast stay-cables conveniently and efficiently,with a basically correct result.
A wireless cable force measurement system of cable structures was developed depending on the basic principle of frequency method.Considering the influence of the flexural rigidity and elastic embedding on the cable,a multistage frequency method based on the genetic algorithm was proposed.This method is generally applicable to most cables with high precision,and doesn't rely on fundamental frequency or a specified order frequency.Thus it's convenient in practical application.Using this method and wireless dynamic test equipment,a integrative wireless cable force measurement system of cable structures was developed.The system was used in the cable force measurement of a stadium's mast stay-cables conveniently and efficiently,with a basically correct result.
引文
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[6]魏金波,李国强,段欣,等.弹性支撑索参数识别方法[J].振动、测试与诊断,2012,32(2):312-316.
[7]秦杰,高政国,钱英欣,等.预应力钢结构拉索索力测试理论与技术[M].北京:中国建筑工业出版社,2010.
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[2]许俊.斜拉索索力简化计算中的精度分析[J].同济大学学报:自然科学版,2001,29(5):611-615.
[3]魏建东.索力测定常用公式精度分析[J].公路交通科技,2004,24(2):53-56.
[4]任伟新,陈刚.由基频计算拉索拉力的实用公式[J].土木工程学报,2005,38(11):26-31.
[5]石春香,李胡生,林立.考虑刚度及边界条件的短索索力求解与试验研究[J].地震工程与工程振动,2010,30(2):86-91.
[6]魏金波,李国强,段欣,等.弹性支撑索参数识别方法[J].振动、测试与诊断,2012,32(2):312-316.
[7]秦杰,高政国,钱英欣,等.预应力钢结构拉索索力测试理论与技术[M].北京:中国建筑工业出版社,2010.
[8]王小平,曹立明.遗传算法——理论、应用与软件实现[M].西安:西安交通大学出版社,2002.
[9]罗尧治,沈雁彬,童若飞,等.空间结构健康监测与预警技术[J].施工技术,2009,38(3):4-8.
[10]童若飞.空间结构模态识别与实测方法研究[D].杭州:浙江大学,2011.
[11]罗尧治,董石麟.空间网格结构微机设计软件MSTCAD的开发[J].空间结构,1995,1(3):53-59.
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