基于敏感性分析的大跨空间网格结构传感器布置研究

发布时间：2018-01-08 06:20

本文关键词：基于敏感性分析的大跨空间网格结构传感器布置研究　出处：《浙江大学》2014年硕士论文　论文类型：学位论文

【摘要】：进入21世纪以来,科技高速发展,出于现代工业的需要以及人类未来的需求,空间结构在世界范围内得到了广泛的应用,并向着巨大化和复杂化发展。大跨空间结构已经成为衡量一个国家建筑科学技术发展水平的重要标志,已被愈来愈广泛地应用于各种地标性公共建筑和民用设施中。基于大跨空间结构的重要性,对其建造及服役期间进行健康监测、损伤预测、识别以及预警具有重要的学术价值和现实意义。传感器是健康监测中获得监测数据的感知层,合理的传感器布置已经受到越来越多的关注。本文首先介绍了国内外对于传感器优化布置的研究现状。目前已有的传感器布置的研究大都基于结构振动性能,然而大跨空间结构的结构效应以静态应力和变形为主,所以传统的传感器布置方法在大跨空间结构中的应用并不一定理想。本文结合空间网格结构自身的特点,从敏感性分析角度出发,对结构进行分析。首先提出了荷载敏感性的概念和评价公式；然后介绍了分析自身敏感性常用的两种方法：蒙特卡罗法和正交试验法。并分析了这两种方法各自的优缺点及适用性。其次,从荷载敏感性分析角度,以一个双层柱面壳为例,详细介绍了荷载敏感性的分析过程和传感器布置过程。并对几个典型的空间网格结构进行了基于荷载敏感性分析的传感器布置,证明了该布置方法在空间网格结构中的适用性。此外,还通过改变结构参数,对不同空间网格结构的传感器布置方案进行总结,得到了一定的规律。此外,本文从结构自身敏感性角度出发,以一个肋环型单层网壳为例,通过蒙特卡罗法和正交试验法进行结构自身敏感性的分析,并在此基础上进行传感器布置。这两种分析方法的分析结果基本一致,从计算效率上考虑,正交试验法更适合杆件众多的空间网格结构。根据结构自身敏感性的分析,得到杆件敏感性的排序,同时根据杆件对评价指标影响的显著性,将结构杆件进行了分级。通过对几个典型空间网格结构的分析,证明了基于结构自身敏感性分析的传感器布置方法在空间网格结构中的适用性。此外,还通过改变结构参数,对不同空间网格结构的传感器布置方案进行总结,得到了一定的规律。最后,在前文对大跨度空间网格结构基于敏感性分析进行传感器布置的基础上对以荷载敏感性分析和自身敏感性分析为核心的大跨度空间网格结构传感器布置系统进行了整体的架构、功能设定与初步的设计开发。
[Abstract]:Since twenty-first Century, the rapid development of science and technology, for the needs of modern industry and the demand of human beings in the future, the space structure has been widely used in the world, and to the huge and complex development. Large span space structure has become an important symbol to measure a country construction science and technology development level, has been more and more widely applied to various kinds of landmark public buildings and civilian facilities. The importance of long-span space structures based on damage prediction, health monitoring, during the construction and service of recognition and warning has important academic value and practical significance. The sensor is obtained in health monitoring of perception layer monitoring data, sensor layout is reasonable more and more attention.
This paper first introduces the domestic and foreign research situation about the optimal placement of sensors. The present study has most of the sensor layout based on vibration performance, however large span space structure structure effect of the static stress and deformation, so the application of the traditional sensor arrangement method of long-span spatial structures is not necessarily ideal. Combining with the characteristics of the space grid structure itself, starting from the angle of sensitivity analysis, structure analysis. Firstly, the concept and evaluation formula of load sensitivity is proposed; then it introduces the analysis of two common methods for its sensitivity: Monte Carlo method and orthogonal test method. And analyzes the advantages and disadvantages of the two methods and their applicability.
Secondly, from the perspective of load sensitivity, with a double-layer cylindrical shell as an example, introduces the analysis process and the sensor layout process load sensitivity. And the space structure of several typical load sensor layout based on sensitivity analysis, prove the applicability of the layout method in space structure. In addition, by changing the structure parameters, summarizes the sensor layout of different space grid structure, obtained certain rules.
In addition, from the perspective of structure sensitivity, with a ribbed reticulated shell as an example, analyze its structure sensitivity by Monte Carlo method and orthogonal test method, the sensor layout and on the basis of analysis. The two methods are basically consistent results from computational efficiency considerations, more suitable for space grid structure bar many orthogonal test. According to the analysis of the sensitivity of the structure itself, get the rod sensitivity ranking, according to the significant influence of the bars on the evaluation index, the structure of classification. Through the analysis of several typical space grid structure, demonstrate the applicability of the sensor in the space grid structure layout method based on sensitivity analysis of the structure itself. In addition, by changing the structure parameters, summarizes the sensor layout of different space grid structure, a The law of determination.
Finally, in the above based on sensitivity analysis based on the sensor layout for the overall architecture to load sensitivity analysis and its sensitivity analysis is the core of the long span space structure sensor layout system of long-span space grid structure, function setting and preliminary design and development.

【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU317

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