本文選題：卷繞系統(tǒng) + 柔性支承�。� 參考：《東華大學》2015年博士論文

【摘要】：在滌綸長絲卷繞機上,錠軸、卷裝、接觸輥所形成的轉速、卷裝質量時變,柔性支承參數(shù)頻變且結構耦合的高速柔性轉子時頻變系統(tǒng)的動力學問題是卷繞機產品動態(tài)設計理論與技術的關鍵,也是制約國產卷繞機研發(fā)的主要瓶頸。本文從其應用基礎理論出發(fā)展開研究,以期揭示卷繞機動力學特性和核心技術問題。根據(jù)目前生產工藝,滌綸長絲卷繞線速度可高達6000 m/min。在卷繞過程,隨著長絲卷繞量的增加,卷裝直徑逐漸增大至滿卷尺寸,而錠軸則從最高工作轉速降到最低卷繞轉速以保持卷繞線速度恒定。當初始卷繞直徑為105mm時錠軸最高轉速達18189r/min,而直徑為65mm的對應接觸輥轉速更高達29382 r/min。卷繞機完成單一周期的卷繞任務需要經歷5個不同階段過程,除其中最后的落卷階段外,其余4個階段中轉子系統(tǒng)均表現(xiàn)出不同的動力學特性：在空管快速啟動階段和滿卷降速停止階段,錠軸轉速時變,橡膠圈柔性支承參數(shù)頻變,而其質量與轉動慣量不變；在卷繞過程階段,隨著卷裝直徑的增大,不僅轉速、質量、轉動慣量時變和柔性支承參數(shù)頻變,而且還存在“錠軸-卷裝-接觸輥”間的剛柔耦合；只有在空管最高轉速點保持階段,錠軸才屬于目前國內大多數(shù)學者所研究的參數(shù)恒定的柔性支承轉子系統(tǒng)。顯然該卷繞轉子系統(tǒng)可謂是具有時頻變特性的復雜轉子系統(tǒng)。本文圍繞高速卷繞轉子系統(tǒng)的時頻變特性以及參數(shù)調控展開研究：(1)分析典型卷繞機的結構組成,剖析卷繞機理、工藝過程,闡明單一卷繞周期內系統(tǒng)不同階段的運動特性及工藝要求。(2)采用Timoshenko梁單元,建立各組件轉子有限元模型和動力學方程；進而引入支承耦合和各組件轉子配合關系,建立錠軸系統(tǒng)有限元模型和動力學方程；最后通過“錠軸-卷裝-接觸輥”的耦合關系,建立了整個卷繞轉子系統(tǒng)全運動過程的有限元模型和動力學方程。(3)采用受迫非共振法的原理試驗測取了“O”型橡膠圈支承剛度和阻尼,并擬合出橡膠圈支承參數(shù)頻變特性曲線以及參數(shù)擬合計算式,為仿真分析系統(tǒng)的動力學特性打下基礎。(4)分析各組件轉子通過耦合形成轉子系統(tǒng)后的質量矩陣、剛度矩陣等的構成原理和過程。針對卷繞系統(tǒng)具有時頻變特性,提出求解系統(tǒng)動力學響應方法,并采用Matlab編制可適應具有時頻變特性的Newmark直接積分法函數(shù)和錠軸、卷繞系統(tǒng)動力學響應計算程序。(5)建立“接觸輥-卷裝”的接觸耦合有限元分析模型,求取接觸耦合剛度與絲層變化的函數(shù)關系。對單一卷繞周期內依次、連續(xù)進行4個階段動力學特性計算和分析,揭示了在不平衡質量激勵下卷繞系統(tǒng)的動態(tài)響應幅頻特性,并從中可知系統(tǒng)較大的不平衡響應幅值是發(fā)生在錠軸快速啟動階段,進而指出調控不平衡響應的重點應放在此階段。(6)調節(jié)卷繞轉子系統(tǒng)相關結構參數(shù)和工作參數(shù),對比參數(shù)調整前后系統(tǒng)不平衡響應,表明合理調整相關參數(shù)來控制系統(tǒng)的不平衡響應幅值行之有效,并給出了相應的調控方法。(7)對一實例卷繞轉子系統(tǒng)進行分析,指出該卷繞機不能達到既定的高卷繞速度而只能降低轉速進行工作的原因,以及通過調整工作轉速區(qū)以使該卷繞機能正常工作的可能性。這些分析得到了相應試驗驗證和產品在實際工作中的檢驗。全文研究創(chuàng)新點在于：①建立了考慮時頻變參數(shù)影響和“錠軸-卷裝-接觸輥”耦合關系的全運動過程系統(tǒng)模型,可有效分析研究高速卷繞轉子系統(tǒng)完整卷繞周期內的動力學性能；②測試了“O”型橡膠圈的柔性支承參數(shù)頻變特性曲線；分析了“接觸輥-卷裝”的接觸耦合剛度與絲層厚度的函數(shù)關系；編制了卷繞轉子系統(tǒng)數(shù)值計算程序,分析了單一卷繞周期內的系統(tǒng)動力學性能,全面揭示了高速卷繞轉子系統(tǒng)在不平衡質量激勵下的動態(tài)響應幅頻特性；③提出通過調節(jié)卷繞轉子結構參數(shù)和工作參數(shù),可有效改善系統(tǒng)的動態(tài)性能,為進一步優(yōu)化設計卷繞轉子系統(tǒng)動力學參數(shù)打下堅實基礎。本文的研究成果對于提高卷繞轉子系統(tǒng)動力學性能,指導研發(fā)具有自主知識產權的卷繞機產品具有重要的理論意義和工程應用價值。
[Abstract]:On the polyester filament winding machine, the rotation speed of the spindle, the volume and the contact roll, the time change of the coiling quality, the frequency change of the flexible supporting parameters and the coupling of the structure are the key to the dynamic design theory and technology of the winding machine, and also the main bottleneck for the development of the home-made winding machine. According to the current production process, the winding speed of the filament winding line can be as high as 6000 m/min. in the winding process. With the increase of the filament winding amount, the volume of the coiling is gradually increased to the full volume, while the spindle axis is reduced from the highest working speed to the lowest. The winding speed is constant and the winding speed is constant. When the initial winding diameter is 105mm, the maximum speed of the spindle axis is 18189r/min, while the corresponding contact roller speed up to the diameter of 65mm is up to 29382 r/min. winding machine to complete the single cycle winding task, which requires 5 different stages, in addition to the final winding stage and the other 4 stages. The rotor system has different dynamic characteristics: in the fast starting stage of the air tube and the stop stage of full roll down speed, the spindle speed changes, the parameters of the rubber ring flexible support frequency change, and the mass and the moment of inertia are constant. In the winding process, with the increase of the volume of the volume, not only the rotational speed, the mass, the moment of inertia time change and the flexible support. The parameter frequency changes, and there is a rigid flexible coupling between the ingot shaft and the contact roller. Only in the stage of the highest speed point of the air tube, the spindle is a flexible supporting rotor system with constant parameters in the current domestic scholars. It is obvious that the winding rotor system is a complex rotor system with time-frequency characteristics. This paper studies the time frequency characteristics and parameter regulation of high-speed winding rotor system. (1) analyze the structure of the typical winding machine, analyze the winding mechanism, process process, clarify the motion characteristics and process requirements of the system in the different stages of the single winding cycle. (2) the finite element model of each component rotor is established by using the Timoshenko beam element. The finite element model and dynamic equation of the spindle axis system are established by introducing the support coupling and the relationship between the components of each component. Finally, the finite element model and dynamic equation of the whole motion process of the whole winding rotor system are established through the coupling relationship between the ingot shaft and the contact roller. (3) the forced non resonance method is adopted. The principle test has measured the support stiffness and damping of "O" rubber ring, and fitting out the frequency variation characteristic curve of the rubber ring support parameters and the parameter fitting calculation formula, which lays the foundation for the simulation and analysis of the dynamic characteristics of the system. (4) analysis the constitution principle of the mass matrix, stiffness matrix and so on after the rotor system is formed by the coupling of the components of each component. And process. In view of the time-frequency characteristics of the winding system, the dynamic response method of the system is solved, and the Newmark direct integral method function and spindle axis and the dynamic response calculation program of the winding system are compiled with Matlab. (5) the contact coupling finite element analysis model of "contact roller coiling" is set up, and the contact coupling finite element analysis model is established. The relationship between the coupling stiffness and the change of the silk layer. In the single winding cycle, the dynamic response of the system is calculated and analyzed in 4 successive stages. The amplitude frequency characteristics of the dynamic response of the winding system under unbalance mass excitation are revealed, and the larger unbalance response amplitude of the system is seen in the rapid start stage of the spindle axis. It is pointed out that the key points for regulating the unbalanced response should be put in this stage. (6) adjusting the related structural parameters and working parameters of the winding rotor system, comparing the unbalanced response of the system before and after adjusting the parameters, indicating that the reasonable adjustment of the relevant parameters to control the amplitude of the unbalanced response of the system is effective, and the corresponding control methods are given. (7) an example volume. This paper analyzes the rotor system and points out that the winding machine can not achieve the established high winding speed but can only reduce the speed to work, and the possibility of normal working of the winding machine through adjusting the working speed zone. These analyses have obtained the corresponding test verification and the inspection of the product in the actual work. The points are as follows: (1) a full motion process system model considering the influence of time-frequency variable parameters and the coupling relationship between the ingot shaft and the contact roller is established. The dynamic performance of the complete winding cycle of the high-speed winding rotor system can be analyzed and studied effectively. Secondly, the frequency variation characteristic curve of the flexible support parameters of the "O" rubber ring is tested. The relationship between the contact coupling stiffness and the thickness of the wire layer, the numerical calculation program of the winding rotor system is developed, the dynamic performance of the system in a single winding cycle is analyzed, and the amplitude frequency characteristic of the dynamic response of the high-speed winding rotor system under the unbalance mass excitation is fully revealed. The rotor structure parameters and working parameters can effectively improve the dynamic performance of the system, and lay a solid foundation for the further optimization of the dynamic parameters of the winding rotor system. The research results of this paper have important theoretical significance for improving the dynamic performance of the winding rotor system and guiding the development of a winding machine with independent knowledge production. Engineering application value.
【學位授予單位】：東華大學
【學位級別】：博士
【學位授予年份】：2015
【分類號】：TS103

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