本文關(guān)鍵詞：月壤鉆取采樣裝置加載機(jī)構(gòu)設(shè)計(jì)與研究　出處：《哈爾濱工業(yè)大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 加載機(jī)構(gòu) 月壤鉆取采樣 可靠性分析 動(dòng)力學(xué)建模

【摘要】：我國(guó)探月工程三期主要任務(wù)之一是通過(guò)鉆采方式獲取深度不小于2米的月壤樣品。加載機(jī)構(gòu)作為在鉆采過(guò)程中提供鉆壓力和控制鉆進(jìn)速度的重要裝置,其卓越的性能及結(jié)構(gòu)可靠性是保證鉆取采樣成功的關(guān)鍵因素。由于國(guó)外的技術(shù)封鎖及國(guó)內(nèi)在此方面起步較晚,目前鮮有月面鉆取采樣用加載機(jī)構(gòu)的研究資料。為分析加載機(jī)構(gòu)性能,確定參數(shù)優(yōu)化設(shè)計(jì)方向,需要對(duì)加載機(jī)構(gòu)進(jìn)行結(jié)構(gòu)設(shè)計(jì)與性能分析,為我國(guó)探月工程三期月面采樣系統(tǒng)提供技術(shù)支持。依照探月工程三期鉆取采樣任務(wù)的總體規(guī)劃,明確加載機(jī)構(gòu)的功能要求并對(duì)其任務(wù)剖面進(jìn)行分析。建立加載機(jī)構(gòu)裕度分析模型,在對(duì)其驅(qū)動(dòng)力裕度分析基礎(chǔ)上進(jìn)行加載輸出單元的裕度設(shè)計(jì)。為保證加載機(jī)構(gòu)高可靠性,應(yīng)用FMEA和FTA可靠性方法對(duì)加載機(jī)構(gòu)進(jìn)行建模與分析,定性和定量的闡明加載機(jī)構(gòu)中各部件故障與整體可靠性的關(guān)系,得出加載機(jī)構(gòu)的可靠性關(guān)鍵環(huán)節(jié)。從加載繩與卷筒的連接方式與纏繞方式兩方面,對(duì)加載繩與卷筒連接接口結(jié)構(gòu)分別提出2種方案。建立鋼絲繩與卷筒作用力學(xué)模型,分析不同工況下結(jié)構(gòu)參數(shù)與加載性能間的關(guān)系并進(jìn)一步確定4種方案下加載機(jī)構(gòu)結(jié)構(gòu)參數(shù)。應(yīng)用層次分析法根據(jù)相應(yīng)評(píng)價(jià)標(biāo)準(zhǔn)建立評(píng)價(jià)模型并確定最佳方案。設(shè)計(jì)加載驅(qū)動(dòng)單元結(jié)構(gòu)方案,建立加載軸系力學(xué)模型并仿真校核軸系受力狀態(tài)。通過(guò)靜力和熱力仿真分析,確定導(dǎo)向輪關(guān)鍵尺寸優(yōu)選參數(shù)。建立鋼絲繩拋物線模型,根據(jù)任務(wù)環(huán)境從靜力、振動(dòng)、附加內(nèi)力三方面分析預(yù)緊力與鋼絲繩性能的關(guān)系并確定最小初始預(yù)緊力。建立卷筒筒壁單元梁模型,推導(dǎo)卷筒在鋼絲繩纏繞下的變形公式并仿真得出兩種極端位置下卷筒受力變形�？紤]加載機(jī)構(gòu)剛?cè)峄旌辖Y(jié)構(gòu)特性,不斷細(xì)化加載機(jī)構(gòu)的動(dòng)力學(xué)模型。在建立剛體、彈性動(dòng)力學(xué)模型基礎(chǔ)上,應(yīng)用集中參數(shù)法引入間隙、阻尼等柔性環(huán)節(jié)建立加載機(jī)構(gòu)各子部件物理模型,得到考慮柔性環(huán)節(jié)的加載機(jī)構(gòu)動(dòng)力學(xué)方程。對(duì)加載機(jī)構(gòu)在鉆具鉆進(jìn)月壤/月巖兩種工況下動(dòng)力學(xué)特性進(jìn)行數(shù)值模擬并分析其在典型負(fù)載下的響應(yīng)。應(yīng)用Adams Cable模塊對(duì)繩輪系統(tǒng)進(jìn)行建模與仿真,分析鋼絲繩參數(shù)對(duì)系統(tǒng)響應(yīng)的影響。通過(guò)變參數(shù)分析,得到加載機(jī)構(gòu)參數(shù)與響應(yīng)的關(guān)系。
[Abstract]:One of the main tasks of the three phase of China's lunar exploration project is to obtain the lunar soil samples with depth of less than 2 meters through drilling and mining. Loading mechanism is an important device to provide drilling pressure and control drilling speed in drilling and production. Its excellent performance and structural reliability are the key factors to ensure the success of drilling and sampling. Because of the technical blockade of foreign countries and the late start of China in this field, there are few research materials on the loading mechanism of the monthly drilling and sampling. In order to analyze the performance of the loading mechanism and determine the direction of parameter optimization, we need to carry out the structural design and performance analysis of the loading mechanism, so as to provide technical support for the three phase lunar surface sampling system of our lunar exploration project. According to the overall planning of the three phase drilling and sampling task, the functional requirements of the loading mechanism are clearly defined and the mission profile is analyzed. The margin analysis model of the loading mechanism is set up, and the margin design of the loading and output unit is carried out on the basis of its driving force margin analysis. In order to ensure high reliability of loading mechanism, FMEA and FTA reliability methods are used to model and analyze loading mechanism, qualitatively and quantitatively explain the relationship between the failure of each part in the loading mechanism and the overall reliability, and get the key link of the reliability of the loading mechanism. From two aspects of the connection mode and winding mode of the load rope and the reel, 2 schemes are proposed for the connection interface structure of the load rope and the reel. A mechanical model of wire rope and reel is established, and the relationship between structural parameters and loading performance under different conditions is analyzed, and the structural parameters of the 4 loading mechanisms are further determined. The analytic hierarchy process (AHP) is used to establish the evaluation model and determine the best scheme according to the corresponding evaluation criteria. The load driving unit structure scheme is designed, the load shafting mechanics model is set up and the force state of the shaft system is checked and checked. Through the static and thermal simulation analysis, the parameters of the key dimensions of the steering wheel are determined. A parabolic model of wire rope is established. According to the task environment, the relationship between preload and wire rope performance is analyzed from three aspects of static force, vibration and additional internal force, and the minimum initial preload is determined. The model of the barrel wall element beam is established, and the deformation formula of the reel under the wire rope is deduced and the force deformation of the two kinds of reels under the extreme position is simulated. The rigid flexible hybrid structure characteristics of the loading mechanism are considered, and the dynamic model of the loading mechanism is continuously refined. On the basis of rigid body and elastic dynamic model, the lumped parameter method is applied to introduce the flexible links such as clearance and damping, and the physical models of each sub part of the loading mechanism are established, and the dynamic equations of the loading mechanism considering the flexible links are obtained. The loading mechanism of lunar soil drilling / dynamic characteristics of two kinds of rocks under the condition of the numerical simulation and analysis of the response in the typical load conditions in drilling. The Adams Cable module is used to model and simulate the rope wheel system, and the influence of the wire rope parameters on the response of the system is analyzed. The relationship between the parameters of the loading mechanism and the response is obtained by the variable parameter analysis.
【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】：2015
【分類(lèi)號(hào)】：V476.3

【引證文獻(xiàn)】

相關(guān)會(huì)議論文 前1條

1 龐_g;鄧湘金;鄭燕紅;;面對(duì)月壤采集的自動(dòng)鉆取機(jī)構(gòu)設(shè)計(jì)[A];中國(guó)宇航學(xué)會(huì)深空探測(cè)技術(shù)專(zhuān)業(yè)委員會(huì)第八屆學(xué)術(shù)年會(huì)論文集（下篇）[C];2011年

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本文編號(hào)：1339663