本文選題：彈性支承　切入點(diǎn)：薄壁內(nèi)齒圈　出處：《華南理工大學(xué)》2016年博士論文　論文類型：學(xué)位論文

【摘要】：從能量密度和均載觀點(diǎn)來看,內(nèi)齒圈的輪緣厚度對行星傳動的功重比和均載特性有較大影響,而內(nèi)齒圈的支承剛度不僅影響行星傳動的均載特性還影響系統(tǒng)的動態(tài)特性等,本文針對某混合動力耦合系統(tǒng)雙離合兩檔行星齒輪傳動機(jī)構(gòu)的結(jié)構(gòu)特點(diǎn),圍繞彈性支承薄壁內(nèi)齒圈兩級行星傳動系統(tǒng)的動力學(xué)問題進(jìn)行了相關(guān)研究,在傳動系統(tǒng)動力學(xué)建模、動力學(xué)特性以及實(shí)驗(yàn)等方面,進(jìn)行了深入研究,主要內(nèi)容包括以下幾個(gè)方面:將彈性支承結(jié)構(gòu)簡化為切向和徑向剛度約束,薄壁內(nèi)齒圈視為標(biāo)準(zhǔn)圓環(huán)建立了僅考慮其面內(nèi)無延展彎曲振動的運(yùn)動微分方程,在計(jì)入第Ⅱ級內(nèi)齒圈的彈性及分析傳動機(jī)構(gòu)各構(gòu)件的相對位移,考慮行星輪位置相角、齒輪副嚙合剛度的時(shí)變性建立第Ⅰ級行星傳動平移-扭轉(zhuǎn)動力學(xué)模型,通過級間耦合的方法推導(dǎo)出彈性支承薄壁內(nèi)齒圈兩級行星傳動系統(tǒng)各構(gòu)件的運(yùn)動微分方程,整理出兩級行星傳動系統(tǒng)的剛度矩陣,分析內(nèi)外嚙合剛度波動情況,為后文的研究工作奠定基礎(chǔ)。計(jì)算了不同行星輪個(gè)數(shù)傳動系統(tǒng)的固有頻率,發(fā)現(xiàn)了系統(tǒng)固有頻率和振動模式與行星輪個(gè)數(shù)有關(guān),歸納總結(jié)出傳動系統(tǒng)7種振動模式:Ⅰ/Ⅱ級耦合扭轉(zhuǎn)振動模式、Ⅰ級平移振動模式、Ⅰ級行星輪振動模式、Ⅱ級平移振動模式、Ⅱ級行星輪簡并振動模式、Ⅱ級行星輪單根振動模式和純內(nèi)齒圈振動模式,具體分析了此7種振動模式的特性。采用有限差分法并結(jié)合模態(tài)能量研究了四行星輪傳動系統(tǒng)的固有頻率對各級齒輪副嚙合剛度及級間耦合剛度的靈敏度,分析了傳動系統(tǒng)固有頻率受第Ⅱ級內(nèi)齒圈徑向支承剛度和彎曲剛度變化的影響程度,研究發(fā)現(xiàn)各剛度參數(shù)對傳動系統(tǒng)固有頻率的影響程度不盡相同,但規(guī)律性明顯,初步探討了模態(tài)躍遷現(xiàn)象。采用數(shù)值法求解了傳動系統(tǒng)的動力學(xué)微分方程,著重分析了第Ⅰ級、第Ⅱ級內(nèi)齒圈及各級行星輪的振動位移時(shí)域和頻域響應(yīng)特性,重點(diǎn)研究了第Ⅱ級內(nèi)齒圈徑向支承剛度、彎曲剛度和級間耦合剛度及工況條件變化對系統(tǒng)的動態(tài)特性影響規(guī)律,得出了系統(tǒng)剛度參數(shù)和工況條件變化對傳動系統(tǒng)的動態(tài)特性的影響規(guī)律。在傳動系統(tǒng)動態(tài)特性理論研究基礎(chǔ)上,搭建了傳動系統(tǒng)振動實(shí)驗(yàn)平臺,實(shí)驗(yàn)研究了第Ⅱ級內(nèi)齒圈徑向支承剛度和彎曲剛度及工況條件變化對傳動系統(tǒng)振動特性的影響,研究發(fā)現(xiàn)在中、低工況條件下,增大第Ⅱ級內(nèi)齒圈的徑向支承剛度和彎曲剛度可在一定程度上抑制傳動系統(tǒng)的振動,工況條件分別對第Ⅰ級、第Ⅱ級行星傳動的影響不盡相同。
[Abstract]:From the point of view of energy density and load equalization, the thickness of inner gear rim has a great influence on the power / weight ratio and load sharing characteristics of planetary transmission, while the supporting stiffness of inner gear ring affects not only the load sharing characteristics of planetary transmission, but also the dynamic characteristics of the system, etc. In this paper, according to the structural characteristics of a hybrid power coupling system with double clutch and two gear gears, the dynamics of the two-stage planetary transmission system with elastic support thin-walled inner gear ring is studied, and the dynamic model of the transmission system is established. The dynamic characteristics and experimental results are studied in detail. The main contents are as follows: the elastic support structure is simplified to tangential and radial stiffness constraints. The thin-walled inner ring is regarded as a standard ring. A differential equation of motion is established which only takes into account the in-plane bending vibration without extension. Considering the elasticity of the second class inner ring and the relative displacement of the components of the transmission mechanism, the phase angle of the position of the planetary gear is considered. The dynamic model of translation and torsion of the first stage planetary transmission is established by the time-variant of the meshing stiffness of the gear pair. The differential equations of motion of the components of the two-stage planetary transmission system with thin-walled inner gear ring with elastic support are derived by the method of interstage coupling. The stiffness matrix of the two-stage planetary transmission system is sorted out, and the fluctuation of the internal and external meshing stiffness is analyzed, which lays a foundation for the later research work. The natural frequencies of different planetary gear number transmission systems are calculated. It is found that the natural frequency and vibration mode of the system are related to the number of planetary wheels, and seven vibration modes of transmission system are summarized: 鈪，

本文編號：1574171