發(fā)布時(shí)間：2018-03-07 19:36

  本文選題：瞬態(tài)熱響應(yīng)特性　切入點(diǎn)：輻射傳熱　出處：《哈爾濱工業(yè)大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：月球探測(cè)工程是我國(guó)目前開展深空探測(cè)活動(dòng)的首要任務(wù)。月球土壤（月壤）中含有豐富的月球環(huán)境和空間環(huán)境變化信息，對(duì)月壤的研究，不僅是探索太陽(yáng)系演化過(guò)程的重要基礎(chǔ)，也是月球礦物、能源資源的儲(chǔ)量、分布和開發(fā)利用價(jià)值的評(píng)估依據(jù)。 月壤采樣鉆具的研制是決定月球樣品采樣成功與否的關(guān)鍵環(huán)節(jié)，而復(fù)雜的月球表面（月面）熱環(huán)境對(duì)鉆具的熱特性分析提出了特殊的要求，進(jìn)而對(duì)鉆具結(jié)構(gòu)和鉆進(jìn)規(guī)程控制的設(shè)計(jì)具有重要意義。 本文針對(duì)一種類似于前蘇聯(lián)月球探測(cè)器LUNA24號(hào)所采用的空心鉆桿加軟袋式取樣鉆具，建立了鉆具在月球表面熱環(huán)境下的分析模型；結(jié)合文獻(xiàn)資料數(shù)據(jù)，確定了一種相對(duì)惡劣的月球表面極限環(huán)境參數(shù)。對(duì)鉆具在月球表面熱環(huán)境下鉆進(jìn)采集月壤樣品的過(guò)程進(jìn)行了熱分析計(jì)算；分析了鉆具鉆進(jìn)過(guò)程中影響表面生熱的月壤物性參數(shù)影響。研究了鉆進(jìn)過(guò)程中鉆具的受力狀態(tài)，建立了熱力邊界條件的關(guān)聯(lián)，編制了ANSYS命令流，實(shí)現(xiàn)了鉆具在不同工況下的熱特性分析。 通過(guò)對(duì)正常工況、惡劣工況以及停機(jī)工況下鉆具的瞬態(tài)熱響應(yīng)計(jì)算分析，討論了以轉(zhuǎn)速、進(jìn)尺速度為主的鉆進(jìn)規(guī)程參數(shù)對(duì)鉆具最高溫度變化和整體溫度分布的影響。結(jié)合正常鉆進(jìn)工況和停機(jī)工況的溫度分布特性，，提出了間歇性停機(jī)的鉆進(jìn)方式，獲得了鉆具高溫區(qū)域溫度控制方案，對(duì)鉆進(jìn)規(guī)程設(shè)計(jì)有一定指導(dǎo)意義。 此外，為了進(jìn)一步完善本文所建立的熱分析模型，補(bǔ)充開展了地面熱環(huán)境下鉆具的熱響應(yīng)特性計(jì)算，為后續(xù)地面試驗(yàn)驗(yàn)證做好準(zhǔn)備。
[Abstract]:Lunar exploration project is the first task of deep space exploration in our country. Lunar soil (lunar soil) contains abundant information of lunar environment and space environment change. It is not only an important basis for exploring the evolutionary process of the solar system, but also an evaluation basis for the reserves, distribution and exploitation value of the lunar mineral and energy resources. The development of lunar soil sampling drilling tool is the key to the success of lunar sample sampling. The complex thermal environment of lunar surface (lunar surface) puts forward special requirements for the analysis of the thermal characteristics of the drilling tool. Furthermore, it is of great significance to the design of drilling tool structure and drilling regulation control. In this paper, an analytical model of hollow drill pipe and soft bag type sampling drilling tool, which is similar to that used by the former USSR lunar probe LUNA24, is established under the thermal environment of the lunar surface. A relatively bad limiting environmental parameter of the lunar surface is determined. The process of drilling the lunar soil samples under the lunar surface thermal environment is analyzed and calculated. This paper analyzes the influence of lunar soil physical parameters on surface heat in drilling process of drilling tools, studies the stress state of drilling tools, establishes the correlation of thermal boundary conditions, and compiles the ANSYS command flow. The thermal characteristics of drilling tools under different working conditions are analyzed. Through the calculation and analysis of the transient thermal response of the drilling tool under normal, bad and downtime conditions, the rotational speed is discussed. The influence of drilling regulation parameters mainly on the variation of maximum temperature and overall temperature distribution of drilling tools is discussed. According to the temperature distribution characteristics of normal drilling conditions and shutdown conditions, the drilling mode of intermittent shutdown is put forward. The temperature control scheme in high temperature area of drilling tool is obtained, which has certain guiding significance for drilling regulation design. In addition, in order to further improve the thermal analysis model established in this paper, the thermal response characteristics of drilling tools under the ground thermal environment are calculated to prepare for the subsequent ground test verification.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：P634;P184

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