【摘要】：齒輪傳動(dòng)是機(jī)械傳動(dòng)系統(tǒng)中的重要組成部分,其具有效率高、結(jié)構(gòu)緊湊、工作可靠等優(yōu)點(diǎn)。與普通齒輪相比,人字齒輪的重合度高,尺寸大,力學(xué)特征復(fù)雜,研究難度大。隨著齒輪高速化、大型化與重載化的發(fā)展,對齒輪傳動(dòng)系統(tǒng)的承載能力與傳動(dòng)平穩(wěn)性提出了更高的要求。因此,深入研究齒輪傳動(dòng)系統(tǒng),對于優(yōu)化系統(tǒng)參數(shù)、提高其安全性、可靠性等有著重要的理論指導(dǎo)意義。 如何合理的建立齒輪系統(tǒng)的精確模型,是研究該系統(tǒng)力學(xué)特征的關(guān)鍵所在。本文首先介紹了關(guān)于齒輪系統(tǒng)的國內(nèi)外研究概況；并且對有限元單元法及ANSYS分析方法相關(guān)理論做了一定闡述。 其次,對齒輪漸開線、過渡曲線以及螺旋線方程從原理上進(jìn)行了分析推導(dǎo),得到了同一坐標(biāo)系下的各曲線方程；根據(jù)人字齒輪的成形原理,采用Pro/E軟件,建立人字齒輪的精確參數(shù)化模型,并對模型進(jìn)行標(biāo)準(zhǔn)裝配。可以方便的對模型進(jìn)行再生修改等,從而在一定程度上縮短了產(chǎn)品開發(fā)周期,節(jié)約了產(chǎn)品開發(fā)成本,提高了生產(chǎn)效率。 最后,將Pro/E模型導(dǎo)入ANSYS,生成有限元模型,劃分合適的網(wǎng)格,采用定義輪齒之間的接觸對的方法模擬齒輪之間的嚙合關(guān)系,并進(jìn)行合適的加載,對齒輪進(jìn)行了非線性接觸分析。在此基礎(chǔ)上,分別選取了不同的摩擦因素進(jìn)行齒面接觸應(yīng)力分析,從而分析齒面摩擦的大小對齒面接觸應(yīng)力有無影響。并對齒輪進(jìn)行了模態(tài)分析,利用Block Lanczos法提取了系統(tǒng)的前10階固有頻率和主振型,模態(tài)振型分析結(jié)果表明對折振和徑向振是齒輪的主要振動(dòng)形式�；诜治鼋Y(jié)果,提出了避免共振的方法。
[Abstract]:Gear transmission is an important part of mechanical transmission system, which has the advantages of high efficiency, compact structure and reliable operation. Compared with ordinary gears, herringbone gears have high coincidence, large size, complex mechanical characteristics and difficult research. With the development of high speed, large scale and heavy load of gears, higher requirements are put forward for the bearing capacity and stability of gear transmission system. Therefore, the research of gear transmission system has important theoretical significance for optimizing system parameters, improving its safety and reliability. How to establish the accurate model of gear system is the key to study the mechanical characteristics of gear system. This paper first introduces the domestic and international research situation of gear system, and the theory of finite element method and ANSYS analysis method is expounded. Secondly, the involute, transition curve and helix equation of gear are analyzed and deduced in principle, and each curve equation in the same coordinate system is obtained. According to the forming principle of herringbone gear, Pro/E software is used. The precise parameterized model of herringbone gear was established and the model was assembled standard. The model can be easily regenerated and modified, thus shortening the product development cycle to a certain extent, saving the cost of product development and improving the production efficiency. Finally, the Pro/E model is introduced into ANSYS, to generate the finite element model, and the suitable mesh is divided. The meshing relationship between gears is simulated by defining the contact pairs between the gear teeth, and the nonlinear contact analysis of the gears is carried out by proper loading. On this basis, different friction factors are selected to analyze the contact stress of tooth surface, and the influence of tooth surface friction on tooth surface contact stress is analyzed. The first 10 natural frequencies and the main modes of the gear are extracted by Block Lanczos method. The results of modal analysis show that the bending and radial vibration are the main vibration forms of the gear. Based on the analysis results, a method to avoid resonance is proposed.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH132.41

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