本文關(guān)鍵詞： 轉(zhuǎn)子-滾動軸承系統(tǒng) 柔性多體系統(tǒng)動力學控制模型 聯(lián)合仿真 有限元分析 不平衡-碰摩-不對中耦合故障 轉(zhuǎn)子故障實驗 模態(tài)實驗　出處：《天津大學》2012年碩士論文　論文類型：學位論文

【摘要】：隨著科學技術(shù)日益發(fā)展,各類旋轉(zhuǎn)機械的功率密度越來越大,其結(jié)構(gòu)要求更加緊湊,導致故障發(fā)生率也隨之增加,而轉(zhuǎn)子系統(tǒng)是旋轉(zhuǎn)機械的核心部件,一旦發(fā)生故障,將會造成重大的經(jīng)濟損失甚至人員傷亡,所以開展故障狀態(tài)下轉(zhuǎn)子-軸承系統(tǒng)動力特性的深入研究存在重要工程應用價值。 本文以航空發(fā)動機轉(zhuǎn)子實驗臺主軸系統(tǒng)為研究對象,以轉(zhuǎn)子動力學與轉(zhuǎn)子故障機理為研究基礎(chǔ),以研究耦合故障狀態(tài)下主軸系統(tǒng)動力特性為目的,通過調(diào)試已搭建航空發(fā)動機轉(zhuǎn)子實驗臺及故障模擬裝置,處理分析所得實驗數(shù)據(jù)并驗證研究故障轉(zhuǎn)子系統(tǒng)動力特性方法。主要內(nèi)容如下: 首先對故障轉(zhuǎn)子-軸承系統(tǒng)動力特性分析的必要性進行闡述,針對國內(nèi)外轉(zhuǎn)子動力學發(fā)展、轉(zhuǎn)子故障機理以及轉(zhuǎn)子故障實驗現(xiàn)狀進行研究,并根據(jù)現(xiàn)有理論基礎(chǔ),確定對故障轉(zhuǎn)子-軸承系統(tǒng)的動力特性研究方法。 隨后通過有限元方法分析實驗主軸系統(tǒng)低頻結(jié)構(gòu)動力特性,將所得固有頻率和振型與模態(tài)試驗結(jié)果進行對比分析,掌握所研究對象固有結(jié)構(gòu)動力特性并驗證所建有限元網(wǎng)格模型可滿足工程設(shè)計和后續(xù)分析的要求。 基于上述工作基礎(chǔ),研究柔性轉(zhuǎn)子-滾動軸承系統(tǒng)在不平衡-碰摩-不對中故障耦合作用下的動力學響應。即運用模態(tài)綜合法建立柔性多體系統(tǒng)動力學模型,并自行編程建立非線性軸承力、碰摩力與不對中激振力模型,最終得到轉(zhuǎn)子—滾動軸承系統(tǒng)的耦合故障柔性多體系統(tǒng)動力學控制模型。分析對比系統(tǒng)在各種故障耦合作用下的振動特征圖。 最后基于航空發(fā)動機轉(zhuǎn)子實驗臺進行實驗分析,通過設(shè)置典型機械故障模擬系統(tǒng)并設(shè)計耦合故障狀態(tài)下轉(zhuǎn)子實驗方案,進行實驗臺振動測試,對實驗數(shù)據(jù)進行對比分析和處理。 本文將柔性多體動力分析與數(shù)值計算聯(lián)合仿真法應用于建立不平衡-碰摩-不對中故障耦合作用下柔性轉(zhuǎn)子-滾動軸承系統(tǒng)動力學模型,進行迭代求解,分析對比系統(tǒng)在各種故障耦合作用下的振動特征圖,對典型故障轉(zhuǎn)子振動特征初步掌握;并通過航空發(fā)動機轉(zhuǎn)子實驗臺進行故障狀態(tài)振動測試,處理所測實驗結(jié)果,對故障狀態(tài)下實驗臺振動特征進行分析,驗證該模型耦合各故障力方法的正確性,并且分析當量不對中量與轉(zhuǎn)子系統(tǒng)振動的關(guān)系。
[Abstract]:With the increasing development of science and technology, more and more power density all kinds of rotating machinery, its structure is more compact, resulting in the failure rate also increased, while the rotor system is the core component of the rotating machinery, the event of failure, will cause significant economic losses and casualties, so to carry out the study on fault state of rotor the dynamic characteristics of the bearing system has important engineering application value.
In this paper, aeroengine rotor experimental system as the research object, based on rotor dynamics and rotor fault mechanism based on the dynamic characteristics of the spindle system of coupled fault condition has been set up for the purpose of debugging of aeroengine rotor test-bed and fault simulation device, analysis the experimental data and verify the fault of rotor system dynamic the characteristics of methods. The main contents are as follows:
It expounds the necessity of the fault analysis of the dynamic characteristics of rotor bearing system, aiming at the development of rotor dynamics at home and abroad, the research of fault mechanism of rotor and rotor fault experimental situation, and according to the existing theory and research methods of determining dynamic characteristics of fault of rotor bearing system.
Then through the finite element method for dynamic analysis of spindle system experimental low-frequency structure, the natural frequency and vibration model and modal test results were compared and analyzed, grasp the dynamic characteristics of objects and structure and verified the finite element mesh model can meet the engineering design and subsequent analysis.
鍩轟簬涓婅堪宸ヤ綔鍩虹,鐮旂┒鏌旀，

本文編號：1507860