本文選題：高速列車(chē) + 極端天氣��； 參考：《西南交通大學(xué)》2016年碩士論文

【摘要】：高速列車(chē)運(yùn)行環(huán)境復(fù)雜,惡劣的氣候環(huán)境對(duì)列車(chē)的運(yùn)行安全有一定的影響。分析極端天氣對(duì)列車(chē)空氣動(dòng)力學(xué)性能的影響能夠在一定程度上為列車(chē)的安全運(yùn)行評(píng)估提供科學(xué)依據(jù),并為之后的深入研究打下基礎(chǔ)。本文在現(xiàn)有商業(yè)CFD軟件ANSYSY ICEM CFD、FLUENT、EnSight及多體動(dòng)力學(xué)軟件SIMPACK基礎(chǔ)上采用C#語(yǔ)言二次開(kāi)發(fā)了一款專(zhuān)門(mén)用于列車(chē)氣動(dòng)安全分析的仿真平臺(tái)。該仿真平臺(tái)具有以下功能：根據(jù)用戶(hù)提供的列車(chē)頭車(chē)及中間車(chē)模型自動(dòng)生成整車(chē)模型及計(jì)算區(qū)域,并在此基礎(chǔ)上自動(dòng)劃分結(jié)構(gòu)化或分結(jié)構(gòu)化網(wǎng)格；用戶(hù)可以根據(jù)自己的計(jì)算需求選擇不同的計(jì)算環(huán)境進(jìn)行計(jì)算,計(jì)算環(huán)境包括標(biāo)準(zhǔn)環(huán)境、橫風(fēng)環(huán)境、沙塵環(huán)境、降雨環(huán)境及降雪環(huán)境；除針對(duì)不同環(huán)境進(jìn)行穩(wěn)態(tài)計(jì)算外,仿真平臺(tái)還可以進(jìn)行標(biāo)準(zhǔn)環(huán)境下的瞬態(tài)計(jì)算,包括明線交會(huì)、隧道通過(guò)、隧道交會(huì)及通過(guò)擋風(fēng)墻；計(jì)算完成后用戶(hù)可以在后處理模塊中得到相應(yīng)的后處理結(jié)果并自動(dòng)生成氣動(dòng)力計(jì)算報(bào)告；氣動(dòng)力計(jì)算完成后,將得到的氣動(dòng)力文件導(dǎo)入到動(dòng)力學(xué)計(jì)算模塊中可以進(jìn)行該氣動(dòng)力下的安全性計(jì)算,并得到五個(gè)動(dòng)力學(xué)指標(biāo)。在仿真平臺(tái)開(kāi)發(fā)完成后利用該平臺(tái)對(duì)典型列車(chē)在不同天氣下的氣動(dòng)力及動(dòng)力學(xué)性能進(jìn)行了分析,并得到了列車(chē)氣動(dòng)力及動(dòng)力學(xué)指標(biāo)隨沙塵濃度、降雨量及降雪量的變化規(guī)律。研究結(jié)果表明：列車(chē)運(yùn)行速度較低時(shí)兩相流對(duì)列車(chē)運(yùn)行阻力的影響較��；隨著列車(chē)運(yùn)行速度的提高,顆粒相對(duì)列車(chē)氣動(dòng)阻力影響越來(lái)越大：不考慮輪軌接觸等因素的影響時(shí),在風(fēng)沙、風(fēng)雨、風(fēng)雪三種環(huán)境中,風(fēng)雨環(huán)境對(duì)列車(chē)動(dòng)力學(xué)性能影響最大,其次是風(fēng)沙,風(fēng)雪影響最小。
[Abstract]:The running environment of high-speed train is complex, and the bad weather environment has certain influence on the train operation safety. The analysis of the influence of extreme weather on the aerodynamic performance of trains can provide a scientific basis for the evaluation of train safety to a certain extent and lay a foundation for further research. Based on the existing commercial CFD software ANSYSY ICEM CFDF fluent EnSight and the multibody dynamics software SIMPACK, a simulation platform for train aerodynamic safety analysis is developed using C # language. The simulation platform has the following functions: the whole vehicle model and the calculation area are automatically generated according to the train headstock and intermediate car model provided by the user, and on this basis, the structured or sub-structured grid is automatically divided; Users can choose different computing environments according to their own computing needs. The computing environment includes standard environment, cross wind environment, sand and dust environment, rainfall environment and snowfall environment. The simulation platform can also be used for transient calculation in standard environment, including open line intersection, tunnel crossing, tunnel crossing and passing through windshield wall. After the calculation is completed, the user can obtain the corresponding post-processing results in the post-processing module and automatically generate the aerodynamic calculation report. The obtained aerodynamic files can be imported into the dynamic calculation module to calculate the safety of the aerodynamic force, and five dynamic indexes can be obtained. After the development of the simulation platform, the aerodynamic and dynamic performances of typical trains under different weather conditions were analyzed, and the variation of train aerodynamic and dynamic indexes with the concentration of sand and dust, rainfall and snowfall were obtained. The results show that the effect of two-phase flow on train running resistance is small when train running speed is low, and with the increase of train running speed, the influence of particle relative to train aerodynamic resistance is more and more great: when the influence of wheel / rail contact and other factors is not considered, In the three environments of wind and sand, wind and rain, wind and snow, the wind and rain environment has the greatest influence on the train dynamic performance, followed by the wind and sand, and the wind and snow have the least impact on the train dynamic performance.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類(lèi)號(hào)】：U298.1

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