| 基于近似微分理论的高压线塔挠度变形研究 |
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| 引用本文： | 杨望山,蔡来良,刘云备,孟万利.基于近似微分理论的高压线塔挠度变形研究[J].测绘工程,2017,26(10). |
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| 作者姓名： | 杨望山 蔡来良 刘云备 孟万利 |
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| 作者单位： | 河南理工大学 测绘与国土信息工程学院,河南 焦作,454000 |
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| 基金项目： | 河南省科技攻关项目，河南省高等学校重点科研项目计划 |
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| 摘 要： | 高压线塔是杆状构筑物,在受到地下开采等外界环境影响时,极易发生变形。文中采用地面三维激光扫描技术记录高压线塔,通过对高压线塔点云数据分层处理,提取各层点云切片中心点坐标。根据线塔不同高度处偏离基础中心点的距离,得到线塔实测挠度。结合材料力学中对杆状结构的受力分析,线塔最大挠度处在线塔的自由端,运用近似微分法实现对高压线塔理论挠度计算。研究表明:从力学角度出发,通过理论计算值与实测挠度值对比,说明近似微分法分析杆状结构挠度变形具有合理性;将理论分析计算与三维激光扫描自动化测量相结合,实现对线塔挠度变形的分析,为进一步研究线塔的挠度变形奠定基础。
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| 关 键 词： | 地面三维激光扫描仪 高压线塔 近似微分法 挠度变形 |
Research on deflection deformation of high-voltage tower based on approximate differential theory |
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| YANG Wangshan,CAI Lailiang,LIU Yunbei,MENG Wanli.Research on deflection deformation of high-voltage tower based on approximate differential theory[J].Engineering of Surveying and Mapping,2017,26(10). |
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| Authors: | YANG Wangshan CAI Lailiang LIU Yunbei MENG Wanli |
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| Abstract: | High-voltage line tower belongs to the rod construction, causing deformation under the influence of outside environment such as underground mining.This paper uses terrestrial laser scanner technology, layering treatment on high-voltage line tower, and extracting the section center coordinates of every layer.The measured deflection of the line tower is obtained according to the distance from the base point at different height center of the line tower.Combined with the force analysis of the rod structure in the material mechanics, the maximum deflection of the tower is at the free end of the tower, and the theoretical analysis of the deformation of high voltage tower is calculated by using approximate differential method.Result shows that from the perspective of mechanical analysis, the approximate differential method is verified by comparing the measured values with the theoretical mechanics analytical solution.Combining the theoretical analysis with the 3D laser scanning automated measurement, the analysis of the deflection of the tower is realized, which lays the foundation for the further study of the deflection deformation of the tower. |
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| Keywords: | terrestrial laser scanner high-voltage line tower approximate differential method Deflection deformation |
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