本文關(guān)鍵詞：基于敏感性分析的大跨空間網(wǎng)格結(jié)構(gòu)傳感器布置研究　出處：《浙江大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 空間網(wǎng)格結(jié)構(gòu) 傳感器布置 敏感性分析 蒙特卡羅法 正交試驗法

【摘要】：進入21世紀(jì)以來,科技高速發(fā)展,出于現(xiàn)代工業(yè)的需要以及人類未來的需求,空間結(jié)構(gòu)在世界范圍內(nèi)得到了廣泛的應(yīng)用,并向著巨大化和復(fù)雜化發(fā)展。大跨空間結(jié)構(gòu)已經(jīng)成為衡量一個國家建筑科學(xué)技術(shù)發(fā)展水平的重要標(biāo)志,已被愈來愈廣泛地應(yīng)用于各種地標(biāo)性公共建筑和民用設(shè)施中。基于大跨空間結(jié)構(gòu)的重要性,對其建造及服役期間進行健康監(jiān)測、損傷預(yù)測、識別以及預(yù)警具有重要的學(xué)術(shù)價值和現(xiàn)實意義。傳感器是健康監(jiān)測中獲得監(jiān)測數(shù)據(jù)的感知層,合理的傳感器布置已經(jīng)受到越來越多的關(guān)注。 本文首先介紹了國內(nèi)外對于傳感器優(yōu)化布置的研究現(xiàn)狀。目前已有的傳感器布置的研究大都基于結(jié)構(gòu)振動性能,然而大跨空間結(jié)構(gòu)的結(jié)構(gòu)效應(yīng)以靜態(tài)應(yīng)力和變形為主,所以傳統(tǒng)的傳感器布置方法在大跨空間結(jié)構(gòu)中的應(yīng)用并不一定理想。本文結(jié)合空間網(wǎng)格結(jié)構(gòu)自身的特點,從敏感性分析角度出發(fā),對結(jié)構(gòu)進行分析。首先提出了荷載敏感性的概念和評價公式；然后介紹了分析自身敏感性常用的兩種方法：蒙特卡羅法和正交試驗法。并分析了這兩種方法各自的優(yōu)缺點及適用性。 其次,從荷載敏感性分析角度,以一個雙層柱面殼為例,詳細(xì)介紹了荷載敏感性的分析過程和傳感器布置過程。并對幾個典型的空間網(wǎng)格結(jié)構(gòu)進行了基于荷載敏感性分析的傳感器布置,證明了該布置方法在空間網(wǎng)格結(jié)構(gòu)中的適用性。此外,還通過改變結(jié)構(gòu)參數(shù),對不同空間網(wǎng)格結(jié)構(gòu)的傳感器布置方案進行總結(jié),得到了一定的規(guī)律。 此外,本文從結(jié)構(gòu)自身敏感性角度出發(fā),以一個肋環(huán)型單層網(wǎng)殼為例,通過蒙特卡羅法和正交試驗法進行結(jié)構(gòu)自身敏感性的分析,并在此基礎(chǔ)上進行傳感器布置。這兩種分析方法的分析結(jié)果基本一致,從計算效率上考慮,正交試驗法更適合桿件眾多的空間網(wǎng)格結(jié)構(gòu)。根據(jù)結(jié)構(gòu)自身敏感性的分析,得到桿件敏感性的排序,同時根據(jù)桿件對評價指標(biāo)影響的顯著性,將結(jié)構(gòu)桿件進行了分級。通過對幾個典型空間網(wǎng)格結(jié)構(gòu)的分析,證明了基于結(jié)構(gòu)自身敏感性分析的傳感器布置方法在空間網(wǎng)格結(jié)構(gòu)中的適用性。此外,還通過改變結(jié)構(gòu)參數(shù),對不同空間網(wǎng)格結(jié)構(gòu)的傳感器布置方案進行總結(jié),得到了一定的規(guī)律。 最后,在前文對大跨度空間網(wǎng)格結(jié)構(gòu)基于敏感性分析進行傳感器布置的基礎(chǔ)上對以荷載敏感性分析和自身敏感性分析為核心的大跨度空間網(wǎng)格結(jié)構(gòu)傳感器布置系統(tǒng)進行了整體的架構(gòu)、功能設(shè)定與初步的設(shè)計開發(fā)。
[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.

【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU317

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