共查询到16条相似文献,搜索用时 125 毫秒
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从齿轮加工原理出发,利用渐开线和齿根过渡曲线方程生成轮齿的精确齿形,建立2种等效直齿锥齿轮三维轮齿几何模型,研究渐开线直齿锥齿轮的精确建模方法.分别使用h-单元和p-单元分析计算直齿锥齿轮齿根应力,建立直齿锥齿轮三维轮齿齿根应力有限元计算模型和计算基准.计算结果与ISO国标公式比较,证明模型的正确性、精确性和可靠性. 相似文献
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圆柱斜齿轮动态强度与疲劳损伤仿真 总被引:1,自引:1,他引:1
为更好满足使用要求,对圆柱斜齿轮进行精确设计与加工,利用非线性有限元仿真软件MSC Marc对圆柱斜齿轮动态啮合过程齿面接触应力和齿根弯曲应力变化规律进行研究,利用疲劳分析软件MSC Fatigue对轮齿齿根弯曲疲劳寿命进行仿真计算,并根据设计寿命计算出安全寿命系数,为齿轮设计提供理论依据. 相似文献
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为研究齿轮传动系统的转动惯量和传动轴的扭转振动对齿轮应力变化的影响,对某齿轮传动中的1对渐开线直齿轮进行有限元动力学分析仿真.首先利用Pro/Engineering建立齿轮副的CAD几何模型;然后导入到LS_DYNA中建立齿轮副有限元模型,对齿轮副进行接触一碰撞有限元动力学分析;最后考虑该齿轮副后传动的转动惯量以及传动轴刚度对齿轮传动的影响,将转动惯量等效成质量圆盘,将传动轴等效成实体单元,建立齿轮传动等效模型的有限元动力学模型.通过分析计算得到齿轮副在模拟工况下的接触应力变化,同时获得在考虑齿轮接触、变形等情况下齿轮传动系统输入和输出的关系.结果表明,后传动输出速度和加速度明显滞后于前传动产生的速度和加速度,而且经过系统传递后,输入使得传动更加平稳.研究结果可为进一步研究齿轮传动系统的动力学特性和疲劳寿命计算提供参考. 相似文献
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传统采煤机齿轮啮合力应力计算方法存在齿轮啮合数据采集不准、传感器效率偏低问题,导致方法应用误差较大.针对上述问题,提出基于非分散红外(Non-Dispersive InfraRed,NDIR)技术原理的采煤机齿轮啮合力应力计算方法.利用NDIR气体传感器,实时采集采煤机齿轮啮合力应力数据,引入有限元方法构建模型,根据Hertz接触法实现静力等效分析以及静态接触分析,通过ANSUS/LS-DYNA计算采煤机齿轮啮合力应力.为验证研究方法的有效性,设计仿真.仿真结果证明了研究方法具有更小应用误差,拟合度较高,且成本较低,具有较好的应用前景. 相似文献
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1 Introduction Straight conical gears are widely used in power transmission between perpendicular shafts. In the last few decades, there has been a growing interest in conical involute gears. Apart from being frequently used in anti-backlash schemes, they are, according to Mitome, also used as reduction gears[1], miter gears, trimming gears and differential gears. The conical involute gear, which is also called beveloid gear by some authors, is an involute gear with tapered tooth thickness, t… 相似文献
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《计算机辅助绘图.设计与制造(英文版)》2016,(3)
The harmonic drive is a kind of gear transmission that uses wave generator to produce controllable soft round elastic deformation and engages with rigid gear to transmit motion and power.The load distribution on the surface of the flexible gear and wave generator is an important parameter of studying the deformation of flexible gear and flexible bearing outside the wave generator and is also a necessary condition for studying the fatigue damage of flexible gear under alternating load.In this paper,a 3D model of 32-type 80:1 harmonic drive is build.Based on the generalized Hooke law,a hypothesis of load distribution which is proved to be validity by using finite element simulation is proposed on the interface of flexible gear and wave generator.On this base,the mathematic model and the quantitative calculation formula of the load distribution on the surface of the flexible gear and wave generator are proposed which provide a basis for the dynamic analysis and the fatigue damage of harmonic gear drive. 相似文献
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Quasi-automatic 3D finite element model generation for individual single-rooted teeth and periodontal ligament 总被引:4,自引:0,他引:4
Clement R Schneider J Brambs HJ Wunderlich A Geiger M Sander FG 《Computer methods and programs in biomedicine》2004,73(2):135-144
The paper demonstrates how to generate an individual 3D volume model of a human single-rooted tooth using an automatic workflow. It can be implemented into finite element simulation. In several computational steps, computed tomography data of patients are used to obtain the global coordinates of the tooth's surface. First, the large number of geometric data is processed with several self-developed algorithms for a significant reduction. The most important task is to keep geometrical information of the real tooth. The second main part includes the creation of the volume model for tooth and periodontal ligament (PDL). This is realized with a continuous free form surface of the tooth based on the remaining points. Generating such irregular objects for numerical use in biomechanical research normally requires enormous manual effort and time. The finite element mesh of the tooth, consisting of hexahedral elements, is composed of different materials: dentin, PDL and surrounding alveolar bone. It is capable of simulating tooth movement in a finite element analysis and may give valuable information for a clinical approach without the restrictions of tetrahedral elements. The mesh generator of FE software ANSYS executed the mesh process for hexahedral elements successfully. 相似文献