本文選題：車(chē)-橋系統(tǒng) + 測(cè)壓試驗(yàn)��； 參考：《中南大學(xué)》2014年碩士論文

【摘要】：運(yùn)行于橋梁上的高速列車(chē)改變了車(chē)橋斷面的氣動(dòng)繞流,使車(chē)-橋系統(tǒng)處于更為不利的風(fēng)環(huán)境之中,車(chē)-橋系統(tǒng)氣動(dòng)特性及擋風(fēng)墻影響的研究對(duì)保障列車(chē)安全運(yùn)行及橋梁可靠服役具有十分重要的意義。在國(guó)家自然科學(xué)基金項(xiàng)目(51178471、51322808)的資助下,本文以縮尺比為1：25的CRH2型高速列車(chē)、京滬高鐵32m簡(jiǎn)支梁橋及雙側(cè)透風(fēng)式擋風(fēng)墻為試驗(yàn)?zāi)Ｐ?依托中南大學(xué)風(fēng)洞試驗(yàn)系統(tǒng),對(duì)車(chē)-橋系統(tǒng)間氣動(dòng)特性的相互干擾及擋風(fēng)墻的影響進(jìn)行了風(fēng)洞測(cè)壓試驗(yàn)研究。全文內(nèi)容概括如下： (1)對(duì)風(fēng)洞試驗(yàn)的基本原理進(jìn)行闡述,給出本文試驗(yàn)列車(chē)、簡(jiǎn)支梁、擋風(fēng)墻的尺寸參數(shù)及車(chē)、橋測(cè)點(diǎn)布置,對(duì)本文試驗(yàn)方法和數(shù)據(jù)處理原理進(jìn)行論述。 (2)對(duì)列車(chē)進(jìn)行了風(fēng)洞測(cè)壓、測(cè)力兩種試驗(yàn)方法所得結(jié)果的對(duì)比,驗(yàn)證了測(cè)壓方法的準(zhǔn)確性及精度,證明了用風(fēng)洞測(cè)壓方法研究車(chē)、橋氣動(dòng)特性具有可行性。研究了兩車(chē)、三車(chē)試驗(yàn)?zāi)Ｐ蛯?duì)測(cè)試結(jié)果的影響,結(jié)果表明兩種模型組合均能滿(mǎn)足試驗(yàn)要求。在橫向來(lái)流作用下,對(duì)橋梁縱、橫向不同位置的列車(chē)進(jìn)行了測(cè)壓試驗(yàn),研究單車(chē)、雙車(chē)與橋梁組合狀態(tài)下橋梁位置及擋風(fēng)墻高度、透風(fēng)率等對(duì)列車(chē)氣動(dòng)特性的影響,并選擇了合理的擋風(fēng)墻高度。 (3)對(duì)側(cè)向來(lái)流作用下的車(chē)-橋系統(tǒng)進(jìn)行了測(cè)壓試驗(yàn),研究列車(chē)氣動(dòng)特性的雷諾數(shù)效應(yīng)、車(chē)-橋系統(tǒng)氣動(dòng)特性的相互干擾及擋風(fēng)墻對(duì)車(chē)-橋系統(tǒng)氣動(dòng)特性的影響。
[Abstract]:The high-speed train running on the bridge changes the aerodynamic flow around the cross-section of the vehicle bridge, which makes the vehicle-bridge system in a more unfavorable wind environment. The study of aerodynamic characteristics of vehicle-bridge system and the influence of windshield wall is of great significance to ensure the safe operation of trains and the reliable service of bridges. Supported by the project of National Natural Science Foundation of China 51178471( 51322808), this paper takes the CRH2 high-speed train with a scale ratio of 1:25, the 32m simply supported beam bridge of Beijing-Shanghai high-speed railway and the double-side ventilated windshield wall as the test model, and relies on the wind tunnel test system of Central South University. The wind tunnel pressure measurement experiment was carried out to study the interaction of aerodynamic characteristics between vehicle and bridge system and the influence of windshield wall. The full text is summarized as follows: 1) the basic principle of wind tunnel test is expounded, the dimension parameters of train, simply supported beam, windshield wall and the arrangement of measuring points of bridge are given, and the test method and data processing principle in this paper are discussed. 2) the results of wind tunnel pressure measurement and force measurement are compared, the accuracy and accuracy of the pressure measurement method are verified, and the feasibility of using the wind tunnel pressure measurement method to study the aerodynamic characteristics of the vehicle and bridge is proved. The effects of two and three vehicle test models on the test results are studied. The results show that the two models can meet the test requirements. Under the action of lateral flow, the influence of bridge position, windshield height and air permeability on the aerodynamic characteristics of the train was studied under the condition of bridge longitudinal and lateral train pressure measurement at different positions, single cycle, double car and bridge combination, and the influence of the bridge position, the height of the windshield wall and the air permeability on the aerodynamic characteristics of the train. The reasonable height of the windshield wall is selected. In this paper, the pressure test of vehicle-bridge system under the action of lateral flow is carried out to study the Reynolds number effect of train aerodynamic characteristics, the mutual interference of vehicle-bridge system aerodynamic characteristics and the influence of windshield wall on the aerodynamic characteristics of vehicle-bridge system.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：U441.3;U270.11

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