本文關鍵詞：TBM刀盤驅動系統分層次建模與耦合振動機理　出處：《大連理工大學》2017年博士論文　論文類型：學位論文

  更多相關文章： TBM刀盤驅動系統 分層次建模方法 耦合振動機理 全局敏感度 模 型實驗臺

【摘要】：全斷面掘進機(TBM)是隧道建設領域的典型重大裝備,其技術難度大且附加值高,體現了我國裝備制造業(yè)的水平。刀盤驅動系統是TBM整機系統動、靜之銜接,兼具支撐與驅動兩大功能。高硬度、高溫、高石英含量的"三高"圍巖環(huán)境引起的復雜刀盤受力性態(tài),使得TBM刀盤驅動系統振動劇烈,易出現傳動部件損壞等工程故障。TBM刀盤驅動系統多點嚙合、多級傳動與多結合面等復雜結構特征,為復雜載荷激勵下的系統動力學特性研究帶來了挑戰(zhàn)。本文以敞開式TBM刀盤驅動系統為研究對象,提出一種針對TBM刀盤驅動系統復雜結構特征的分層次動力學建模與分析方法,研究強沖擊激勵下的系統耦合振動機理,揭示系統參數對動力學特性的影響規(guī)律,并通過掘進現場與模型實驗臺的振動測試進行了理論模型驗證。主要研究工作如下:1)針對TBM刀盤驅動系統的復雜結構特征,基于廣義有限元建模思想,提出一種適用于復雜齒輪傳動系統的分層次動力學建模方法。綜合考慮TBM刀盤驅動系統驅動元參數與運動、力參數間的強耦合關系,采用基于動力學相似理論的虛擬軸段等效方法,建立了包含多源驅動、主減速器多級行星輪系及各結構件單元結合部位的非線性因素的刀盤驅動系統整機動力學模型。2)研究TBM刀盤驅動系統固有頻率與振型特征,將系統振型劃分成軸向振型、扭轉振型與橫向振型三種類型,得到了系統設計中應避免的模態(tài)躍遷點,并建議采用中心對稱作為小齒輪分布方式;結合多源變頻電機主從控制下的轉速與轉矩特性,研究電機啟動、穩(wěn)態(tài)載荷與沖擊載荷等工況下的時頻響應及系統動態(tài)嚙合力特性,并揭示刀盤載荷、小齒輪分布方式及刀盤轉速對系統振動響應特性的影響規(guī)律;基于仿真載荷下的預估響應與現場振動實測數據在振動水平上相當,誤差約為18%～50%。3)以固有頻率、關鍵節(jié)點振動響應及動態(tài)嚙合力為系統動力學特性評價指標,考慮外部載荷、材料系數、嚙合參數與聯接參數等輸入參數變化,基于代理模型技術分析了系統動力學特性的全局參數敏感度,獲得了考慮多種類型參數交互作用的刀盤驅動系統動力學特性變化規(guī)律,為TBM刀盤驅動系統動力學設計提供理論依據。4)設計并建立刀盤驅動系統模型實驗臺,驗證了各級傳動系統的嚙合頻率及倍頻是刀盤驅動系統的主要振動頻率,且系統振動表現出明顯的耦合特性。
[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.
【學位授予單位】：大連理工大學
【學位級別】：博士
【學位授予年份】：2017
【分類號】：U455.31

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本文編號：1341401