本文關(guān)鍵詞： 超聲測溫 一維穩(wěn)態(tài)溫度場 溫度場重建 試驗驗證　出處：《機械工程學(xué)報》2017年12期 　論文類型：期刊論文

【摘要】：針對在工業(yè)應(yīng)用中對結(jié)構(gòu)內(nèi)部溫度場無損測量的需求,以超聲測溫機理和熱傳導(dǎo)理論為基礎(chǔ),提出一種一維穩(wěn)態(tài)結(jié)構(gòu)內(nèi)部溫度場的重建方法,并且設(shè)計一套微秒級超聲聲時測量的超聲測溫系統(tǒng)以驗證此方法的可行性。根據(jù)所提出的結(jié)構(gòu)內(nèi)部溫度場重建方法,分別進行超聲聲速與溫度的標定試驗和結(jié)構(gòu)內(nèi)部一維穩(wěn)態(tài)非均勻溫度場的重建試驗,測量了結(jié)構(gòu)試樣在單邊受熱過程中的超聲聲時,構(gòu)建了結(jié)構(gòu)試樣底面在100℃、150℃、200℃加熱,上表面15℃水冷情況下的內(nèi)部溫度場分布,并且系統(tǒng)分析冷端邊界條件、標定方程、熱擴散系數(shù)、熱膨脹等因素對重建效果的影響。結(jié)果表明:本方法能夠?qū)崿F(xiàn)結(jié)構(gòu)內(nèi)部一維穩(wěn)態(tài)溫度場的重建,并且在對于溫度梯度明顯的區(qū)域具有較好的重建精度。
[Abstract]:In order to meet the demand of non-destructive measurement of internal temperature field in industrial application, a method of reconstruction of internal temperature field of one-dimensional steady-state structure is proposed based on the theory of ultrasonic temperature measurement and heat conduction. In order to verify the feasibility of this method, a set of ultrasonic temperature measurement system with microsecond ultrasonic acoustic time was designed to verify the feasibility of the method. According to the proposed method of internal temperature field reconstruction of the structure. The ultrasonic velocity and temperature calibration test and the internal one-dimensional steady nonuniform temperature field reconstruction test were carried out respectively to measure the supersonic sound time of the structure specimen in the process of one-sided heating. The distribution of internal temperature field on the bottom surface of the structural specimen under 100 鈩，

本文編號：1471578