偏航變槳軸承力學特性分析及結構優(yōu)化設計
發(fā)布時間：2018-07-16 20:42
【摘要】：偏航、變槳軸承廣泛使用大型四點接觸球軸承,工作時承受軸向載荷、徑向載荷及傾覆力矩的聯(lián)合作用,具有工況載荷復雜、結構尺寸大、整體剛度低及工作轉速低的特點,因此不能采用普通軸承的分析方法,而有必要針對其展開專門的研究與分析。本文采用數(shù)值分析法和有限元仿真法,研究偏航、變槳軸承的力學特性和結構參數(shù)的優(yōu)化設計。 首先,簡要分析了偏航、變槳軸承的工作環(huán)境、載荷特征、結構形式等特點,詳細闡述了以Hertz彈性接觸理論為條件的偏航、變槳軸承接觸變形和接觸應力的非線性關系,推導了偏航、變槳軸承接觸載荷和接觸剛度的計算方法,并介紹了其靜強度和疲勞強度的計算理論。 其次,根據(jù)偏航、變槳軸承的使用工況條件、幾何結構特點和變形協(xié)調關系,建立了考慮實際接觸角、游隙、滾道溝曲率半徑系數(shù)等因素的偏航、變槳軸承力學模型,并給出了采用牛頓—拉夫森迭代法求解力學模型的詳細過程,并以某一型號偏航、變槳軸承為例,研究了不同工況條件下軸承的載荷分布規(guī)律及實際接觸角的變化情況。 接著,采用力學模型與經驗公式兩種方法計算偏航、變槳軸承的最大接觸載荷并進行對比分析,初步驗證了偏航、變槳軸承力學模型求解最大接觸載荷及計算靜強度的正確性�；诹W模型計算接觸載荷的方法,實現(xiàn)了偏航、變槳軸承承載曲面和承載曲線的精確繪制。 然后,分析了滾道排距、游隙、接觸角、溝曲率半徑等結構參數(shù)對軸承接觸載荷、接觸應力、實際接觸角、承載滾動體個數(shù)等力學性能的影響規(guī)律,完成了以最小接觸應力為目標函數(shù)的偏航、變槳軸承優(yōu)化模型建立,并采用遺傳算法進行求解,從而實現(xiàn)了偏航、變槳軸承結構參數(shù)的優(yōu)化設計。 最后,采用有限元分析法對比分析了無支撐結構和含支撐結構的偏航、變槳軸承兩種模型的載荷分布及實際接觸角變化規(guī)律,并通過與力學模型計算結果進行對比分析,進一步驗證了偏航、變槳軸承力學模型求解載荷分布方法的正確性。
[Abstract]:Yaw, variable propeller bearings are widely used in large four-point contact ball bearings, bearing axial load, radial load and overturning torque. They are characterized by complex working load, large structure size, low overall stiffness and low rotational speed. Therefore, it is necessary to carry out special research and analysis for ordinary bearings. In this paper, numerical analysis and finite element simulation are used to study the optimum design of mechanical properties and structural parameters of yaw and variable propeller bearings. First of all, the characteristics of yaw, variable pitch bearing working environment, load characteristic, structure form and so on are briefly analyzed, and the nonlinear relationship between contact deformation and contact stress of variable propeller bearing based on Hertz elastic contact theory is described in detail. The calculation methods of contact load and contact stiffness of yaw and variable propeller bearings are derived, and the calculation theory of static strength and fatigue strength are introduced. Secondly, according to the operating conditions of yaw, variable propeller bearing, geometric structure characteristic and deformation coordination relation, the mechanical model of variable propeller bearing is established considering the actual contact angle, clearance, raceway curvature radius coefficient and so on. The detailed process of solving the mechanical model by Newton-Raphson iterative method is given. Taking a certain type of yaw and variable propeller bearing as an example, the load distribution law of bearing and the change of actual contact angle under different working conditions are studied. Then, the maximum contact load of the variable pitch bearing is calculated by using the mechanical model and the empirical formula, and the correctness of the yaw and the mechanical model of the variable propeller bearing is preliminarily verified by the calculation of the maximum contact load and the static strength of the variable propeller bearing. Based on the mechanical model, the accurate drawing of yaw, bearing surface and bearing curve is realized. Then, the effects of raceway spacing, clearance, contact angle, groove radius of curvature on the contact load, contact stress, actual contact angle and the number of bearing rolling bodies are analyzed. The yaw with minimum contact stress as the objective function and the optimization model of variable propeller bearing are established and solved by genetic algorithm. Thus the optimum design of structural parameters of yaw and variable pitch bearing is realized. Finally, the load distribution and actual contact angle of the two models of unsupported structure and bearing with support are analyzed by means of finite element analysis, and the results are compared with the results of mechanical model. Furthermore, the correctness of the method of calculating load distribution by the mechanical model of yaw and variable propeller bearing is verified.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH133.3
本文編號：2127613
[Abstract]:Yaw, variable propeller bearings are widely used in large four-point contact ball bearings, bearing axial load, radial load and overturning torque. They are characterized by complex working load, large structure size, low overall stiffness and low rotational speed. Therefore, it is necessary to carry out special research and analysis for ordinary bearings. In this paper, numerical analysis and finite element simulation are used to study the optimum design of mechanical properties and structural parameters of yaw and variable propeller bearings. First of all, the characteristics of yaw, variable pitch bearing working environment, load characteristic, structure form and so on are briefly analyzed, and the nonlinear relationship between contact deformation and contact stress of variable propeller bearing based on Hertz elastic contact theory is described in detail. The calculation methods of contact load and contact stiffness of yaw and variable propeller bearings are derived, and the calculation theory of static strength and fatigue strength are introduced. Secondly, according to the operating conditions of yaw, variable propeller bearing, geometric structure characteristic and deformation coordination relation, the mechanical model of variable propeller bearing is established considering the actual contact angle, clearance, raceway curvature radius coefficient and so on. The detailed process of solving the mechanical model by Newton-Raphson iterative method is given. Taking a certain type of yaw and variable propeller bearing as an example, the load distribution law of bearing and the change of actual contact angle under different working conditions are studied. Then, the maximum contact load of the variable pitch bearing is calculated by using the mechanical model and the empirical formula, and the correctness of the yaw and the mechanical model of the variable propeller bearing is preliminarily verified by the calculation of the maximum contact load and the static strength of the variable propeller bearing. Based on the mechanical model, the accurate drawing of yaw, bearing surface and bearing curve is realized. Then, the effects of raceway spacing, clearance, contact angle, groove radius of curvature on the contact load, contact stress, actual contact angle and the number of bearing rolling bodies are analyzed. The yaw with minimum contact stress as the objective function and the optimization model of variable propeller bearing are established and solved by genetic algorithm. Thus the optimum design of structural parameters of yaw and variable pitch bearing is realized. Finally, the load distribution and actual contact angle of the two models of unsupported structure and bearing with support are analyzed by means of finite element analysis, and the results are compared with the results of mechanical model. Furthermore, the correctness of the method of calculating load distribution by the mechanical model of yaw and variable propeller bearing is verified.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH133.3
【參考文獻】
相關期刊論文 前10條
1 楊咸啟,姜韶峰,陳俊杰,王衛(wèi)國;高速角接觸球軸承優(yōu)化設計[J];軸承;2000年01期
2 羅繼偉;滾動軸承受力分析及其進展[J];軸承;2001年09期
3 姜韶峰;角接觸球軸承套圈擋邊的設計[J];軸承;2002年03期
4 李媛媛,葉亞飛;風力發(fā)電機專用軸承[J];軸承;2004年02期
5 蘇立樾,蘇健;轉盤軸承靜載荷承載曲線的創(chuàng)建[J];軸承;2004年06期
6 吳云鵬,張文平,孫立紅;滾動軸承力學模型的研究及其發(fā)展趨勢[J];軸承;2004年07期
7 王東峰;葉軍;楊伯原;宋麗;;雙列角接觸球軸承的多目標優(yōu)化設計[J];軸承;2007年08期
8 徐紹仁;楊友中;白宇光;王燕霜;鄧四二;;特大型負游隙四點接觸球軸承擬靜力學分析[J];軸承;2009年09期
9 楊曉蔚;;風電產業(yè)、風電設備及風電軸承[J];軸承;2009年12期
10 陳龍;趙聯(lián)春;夏新濤;邱明;;變槳軸承載荷分布分析[J];軸承;2010年01期
相關碩士學位論文 前4條
1 徐弘毅;重載滾動軸承的仿真與優(yōu)化設計[D];清華大學;2010年
2 周晴;風力發(fā)電機主軸軸承的優(yōu)化設計及可靠性研究[D];河南科技大學;2011年
3 張亞平;偏航、變槳軸承運動方程建立及可靠性研究[D];河南科技大學;2011年
4 李建征;盾構機主軸承的有限元分析及壽命研究[D];河南科技大學;2011年
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