本文關(guān)鍵詞：基于超聲波技術(shù)的螺栓緊固軸力測(cè)量應(yīng)用研究　出處：《浙江工業(yè)大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 超聲波 軸向力 PMTS 螺栓 螺栓應(yīng)力

【摘要】：高強(qiáng)度螺栓作為連接件,已被廣泛應(yīng)用于機(jī)械設(shè)備、車輛船舶、飛機(jī)衛(wèi)星、鐵路橋梁、建筑結(jié)構(gòu)等領(lǐng)域。為了確保這些鋼構(gòu)工程的穩(wěn)定和安全,研究一種能直接、準(zhǔn)確測(cè)量高強(qiáng)度螺栓緊固軸力的方法具有十分重要的意義。本文依據(jù)超聲波聲彈性原理,選用長(zhǎng)興縣某高速中央大道鋼桁梁橋用的6種高強(qiáng)度螺栓為試驗(yàn)樣品進(jìn)行試驗(yàn)研究。本論文的主要研究工作如下： 1、本文對(duì)于工程施工常用的螺栓緊固方法的經(jīng)濟(jì)性、精度、重復(fù)性和再現(xiàn)性進(jìn)行了比較分析,重點(diǎn)研究了基于聲彈性現(xiàn)象的超聲波螺栓軸力測(cè)量的方法和原理,并且有針對(duì)性的介紹了新型的頭部鑲嵌永久壓電傳感器的螺栓(PMTS)的原理和應(yīng)用。 2、分析研究了螺栓扭拉復(fù)合受力狀態(tài)和單一只受軸力狀態(tài)下建立的螺栓超聲特性曲線的區(qū)別,提出了單一只受軸力狀態(tài)下建立的特性曲線的修正方法及夾緊長(zhǎng)度改變、螺栓溫度改變時(shí)螺栓特性曲線的修正方法。 3、根據(jù)課題需要對(duì)于6種試驗(yàn)螺栓進(jìn)行理化檢測(cè)并搭建了課題研究平臺(tái),依托試驗(yàn)平臺(tái)研究了螺栓材料狀態(tài)、夾緊長(zhǎng)度情況、螺栓溫度狀況、螺栓表面狀況、形式尺寸大小、人員操作情況對(duì)超聲波測(cè)量螺栓緊固軸力的影響,并重點(diǎn)分析了相同批次螺栓的在不同夾緊長(zhǎng)度和不同溫度條件下對(duì)超聲測(cè)軸力的影響,提出了相同批次螺栓的緊固軸力與超聲飛行時(shí)間差之間、螺栓夾緊長(zhǎng)度與緊固軸力之間、螺栓溫度與螺栓緊固軸力之間的關(guān)系。 4、筆者將試驗(yàn)螺栓按本文的研究方法進(jìn)行總結(jié)分析,使用10只新型的頭部鑲嵌永久壓電傳感器的螺栓(PMTS)與普通螺栓一起進(jìn)行施工安裝并檢驗(yàn),精度分析結(jié)果表明,試驗(yàn)螺栓的軸力測(cè)量精度滿足現(xiàn)場(chǎng)安裝要求。
[Abstract]:High strength bolts as connectors have been widely used in mechanical equipment, vehicles, ships, aircraft satellites, railway bridges, building structures and other fields. In order to ensure the stability and safety of these steel construction projects. It is very important to study a method to measure the fastening axial force of high strength bolt directly and accurately. This paper is based on the principle of acoustic elasticity of ultrasonic wave. Six kinds of high strength bolts used in a high speed central road steel truss girder bridge in Changxing County are selected as experimental samples. The main research work of this paper is as follows: 1. The economy, precision, repeatability and reproducibility of bolt fastening methods commonly used in engineering construction are compared and analyzed in this paper. The method and principle of ultrasonic bolt axial force measurement based on acoustic elastic phenomenon are studied emphatically. The principle and application of a new type of PMTS with permanent piezoelectric sensor on the head are introduced. 2. The difference of the ultrasonic characteristic curve between the twisting and pulling state of bolt and that of a single bolt under axial force is analyzed and studied. The correction method of the characteristic curve established under the condition of single axial force and the correction method of the characteristic curve of the bolt with the change of clamping length and bolt temperature are put forward. 3. According to the need of the project, the physical and chemical testing of six kinds of test bolts was carried out and the research platform was built. Based on the test platform, the state of bolt material, clamping length and bolt temperature were studied. The influence of the surface condition, the size of the form, and the personnel operation on the ultrasonic measurement of the fastening axial force of the bolt. The influence of different clamping length and different temperature on the ultrasonic axial force of the same batch bolt is analyzed, and the difference between the fastening axial force of the same batch bolt and the time of flight of ultrasonic is put forward. The relationship between bolt clamping length and fastening axial force, bolt temperature and bolt fastening axial force. 4. The author summarizes and analyzes the test bolt according to the research method in this paper, and uses 10 new type bolt with permanent piezoelectric sensor to carry on the construction installation and the inspection together with the ordinary bolt. The results of precision analysis show that the axial force measurement accuracy of the test bolt can meet the requirements of field installation.
【學(xué)位授予單位】：浙江工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH131.3;TB559

【引證文獻(xiàn)】

相關(guān)期刊論文 前1條

1 鄭凌冰;孫國(guó)峰;;常用螺栓緊固一致性的研究及應(yīng)用[J];科技創(chuàng)新與應(yīng)用;2013年26期

，

本文編號(hào)：1364808