TBM刀盤驅(qū)動(dòng)系統(tǒng)分層次建模與耦合振動(dòng)機(jī)理
本文關(guān)鍵詞:TBM刀盤驅(qū)動(dòng)系統(tǒng)分層次建模與耦合振動(dòng)機(jī)理 出處:《大連理工大學(xué)》2017年博士論文 論文類型:學(xué)位論文
更多相關(guān)文章: TBM刀盤驅(qū)動(dòng)系統(tǒng) 分層次建模方法 耦合振動(dòng)機(jī)理 全局敏感度 模 型實(shí)驗(yàn)臺(tái)
【摘要】:全斷面掘進(jìn)機(jī)(TBM)是隧道建設(shè)領(lǐng)域的典型重大裝備,其技術(shù)難度大且附加值高,體現(xiàn)了我國(guó)裝備制造業(yè)的水平。刀盤驅(qū)動(dòng)系統(tǒng)是TBM整機(jī)系統(tǒng)動(dòng)、靜之銜接,兼具支撐與驅(qū)動(dòng)兩大功能。高硬度、高溫、高石英含量的"三高"圍巖環(huán)境引起的復(fù)雜刀盤受力性態(tài),使得TBM刀盤驅(qū)動(dòng)系統(tǒng)振動(dòng)劇烈,易出現(xiàn)傳動(dòng)部件損壞等工程故障。TBM刀盤驅(qū)動(dòng)系統(tǒng)多點(diǎn)嚙合、多級(jí)傳動(dòng)與多結(jié)合面等復(fù)雜結(jié)構(gòu)特征,為復(fù)雜載荷激勵(lì)下的系統(tǒng)動(dòng)力學(xué)特性研究帶來(lái)了挑戰(zhàn)。本文以敞開(kāi)式TBM刀盤驅(qū)動(dòng)系統(tǒng)為研究對(duì)象,提出一種針對(duì)TBM刀盤驅(qū)動(dòng)系統(tǒng)復(fù)雜結(jié)構(gòu)特征的分層次動(dòng)力學(xué)建模與分析方法,研究強(qiáng)沖擊激勵(lì)下的系統(tǒng)耦合振動(dòng)機(jī)理,揭示系統(tǒng)參數(shù)對(duì)動(dòng)力學(xué)特性的影響規(guī)律,并通過(guò)掘進(jìn)現(xiàn)場(chǎng)與模型實(shí)驗(yàn)臺(tái)的振動(dòng)測(cè)試進(jìn)行了理論模型驗(yàn)證。主要研究工作如下:1)針對(duì)TBM刀盤驅(qū)動(dòng)系統(tǒng)的復(fù)雜結(jié)構(gòu)特征,基于廣義有限元建模思想,提出一種適用于復(fù)雜齒輪傳動(dòng)系統(tǒng)的分層次動(dòng)力學(xué)建模方法。綜合考慮TBM刀盤驅(qū)動(dòng)系統(tǒng)驅(qū)動(dòng)元參數(shù)與運(yùn)動(dòng)、力參數(shù)間的強(qiáng)耦合關(guān)系,采用基于動(dòng)力學(xué)相似理論的虛擬軸段等效方法,建立了包含多源驅(qū)動(dòng)、主減速器多級(jí)行星輪系及各結(jié)構(gòu)件單元結(jié)合部位的非線性因素的刀盤驅(qū)動(dòng)系統(tǒng)整機(jī)動(dòng)力學(xué)模型。2)研究TBM刀盤驅(qū)動(dòng)系統(tǒng)固有頻率與振型特征,將系統(tǒng)振型劃分成軸向振型、扭轉(zhuǎn)振型與橫向振型三種類型,得到了系統(tǒng)設(shè)計(jì)中應(yīng)避免的模態(tài)躍遷點(diǎn),并建議采用中心對(duì)稱作為小齒輪分布方式;結(jié)合多源變頻電機(jī)主從控制下的轉(zhuǎn)速與轉(zhuǎn)矩特性,研究電機(jī)啟動(dòng)、穩(wěn)態(tài)載荷與沖擊載荷等工況下的時(shí)頻響應(yīng)及系統(tǒng)動(dòng)態(tài)嚙合力特性,并揭示刀盤載荷、小齒輪分布方式及刀盤轉(zhuǎn)速對(duì)系統(tǒng)振動(dòng)響應(yīng)特性的影響規(guī)律;基于仿真載荷下的預(yù)估響應(yīng)與現(xiàn)場(chǎng)振動(dòng)實(shí)測(cè)數(shù)據(jù)在振動(dòng)水平上相當(dāng),誤差約為18%~50%。3)以固有頻率、關(guān)鍵節(jié)點(diǎn)振動(dòng)響應(yīng)及動(dòng)態(tài)嚙合力為系統(tǒng)動(dòng)力學(xué)特性評(píng)價(jià)指標(biāo),考慮外部載荷、材料系數(shù)、嚙合參數(shù)與聯(lián)接參數(shù)等輸入?yún)?shù)變化,基于代理模型技術(shù)分析了系統(tǒng)動(dòng)力學(xué)特性的全局參數(shù)敏感度,獲得了考慮多種類型參數(shù)交互作用的刀盤驅(qū)動(dòng)系統(tǒng)動(dòng)力學(xué)特性變化規(guī)律,為TBM刀盤驅(qū)動(dòng)系統(tǒng)動(dòng)力學(xué)設(shè)計(jì)提供理論依據(jù)。4)設(shè)計(jì)并建立刀盤驅(qū)動(dòng)系統(tǒng)模型實(shí)驗(yàn)臺(tái),驗(yàn)證了各級(jí)傳動(dòng)系統(tǒng)的嚙合頻率及倍頻是刀盤驅(qū)動(dòng)系統(tǒng)的主要振動(dòng)頻率,且系統(tǒng)振動(dòng)表現(xiàn)出明顯的耦合特性。
[Abstract]:Full section roadheader (TBM) is a typical major equipment in the field of tunnel construction. It has high technical difficulty and high added value, which embodies the level of China's equipment manufacturing industry. The tool disk drive system is the dynamic and static connection of the TBM system, with two functions of both support and drive. Due to the high hardness, high temperature and high quartz content, the complex cutter head's stress state caused by the "three high" surrounding rock environment makes the TBM cutter drive system vibrate violently, and the transmission parts are easily damaged. TBM cutter head drive system has many complex structural characteristics, such as multi-point meshing, multistage transmission and multiple joint surfaces. It challenges the research of system dynamics under complex load excitation. In this paper, the open type TBM cutter drive system as the research object, presents a TBM for cutter drive system complex structure hierarchical dynamic modeling and analysis method, study the impact mechanism of strong coupled vibration system under the excitation system parameters on the dynamic characteristics, reveal the influence rule, and the theoretical model is verified by vibration test driving field and experimental model. The main research works are as follows: 1) aiming at the complex structural characteristics of TBM cutter drive system, a hierarchical dynamic modeling method for complex gear transmission system is proposed based on generalized finite element modeling idea. Considering the TBM cutter drive system parameters and element movement, strong coupling relationship between parameters, the dynamic similarity virtualaxis equivalent method based on the theory, including multi drive, main reducer multistage planetary gear train and the structure of the unit with parts of the non linear factors of the cutting wheel drive system dynamics model. 2) of TBM cutter driving system of natural frequency and vibration characteristics, the system mode is divided into axial mode, torsional vibration and lateral vibration of three types, the mode transition point should be avoided in the design of the system, and suggested that the central symmetry as a small gear distribution; combination of speed and torque characteristics multi frequency motor master-slave control of the dynamic frequency response and system of meshing motor starting, steady load and impact load under the conditions of the force characteristics, and reveals the influence of response characteristics of cutter load, small gear distribution and cutter speed on the vibration response of the load forecast; simulation and field vibration measurement in the vibration level based on the data, the error is about 18% ~ 50%. 3) to the natural frequency, critical vibration response and dynamic meshing force for node system dynamics evaluation index, considering the change of external load, material properties, meshing parameters and coupling parameters of the input parameters, based on the global technology agent model to analyze the dynamic characteristics of the system parameter sensitivity is obtained considering the driving dynamics characteristics of the system of various types the interaction parameters of cutter, and provide a theoretical basis for the design of system dynamics TBM cutter drive. 4) design and set up the experimental platform of the cutter drive system, verify that the meshing frequency and frequency doubling of all transmission systems are the main vibration frequencies of the cutter drive system, and the system vibration shows obvious coupling characteristics.
【學(xué)位授予單位】:大連理工大學(xué)
【學(xué)位級(jí)別】:博士
【學(xué)位授予年份】:2017
【分類號(hào)】:U455.31
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