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基于ANSYS的准双曲面齿轮建模及有限元分析 总被引:1,自引:0,他引:1
针对传统悬臂梁理论计算轮齿弯曲应力的不足 ,本文在ANSYS软件中采用从低级到高级的建模方法对准双曲面齿轮进行三维实体建模 ,并对齿轮进行分析 ,收敛计算到足够的精确度 ,得到了满意的结果。文中采用了合理的分割方法对轮齿进行切块、选用六面体单元划分网格 ,根据赫兹理论对齿面瞬时接触椭圆施加半椭球分布压力 ,分析结果更准确。该建模方法易于实现参数化建模 ,为复杂零件的三维实体建模提供了一个思路。 相似文献
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提高轧管机主机头运动稳定性对改善钢管的轧制质量有着较大的影响。本文通过对LD-15型轧管机的工作机架进行运动学分析,推导出主机头的运动加速度的解析表达式。以此为基础建立数学模型,对与轧管机主机头运动稳定性密切相关的曲柄半径、连杆长度和分别做了优化设计,并对优化结果做了分析,主机头运动稳定性有明显的提高。本文推导的数学模型为提高轧管机稳定性进行优化设计提供了数学基础,方法可行。 相似文献
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To improve the quality of a joint composed of metallic microstructural parts, a novel resistance brazing method called the ‘two-step resistance brazing method’ has been developed. In this method, filler metals plated on the surface of base metals are butted and alloyed due to the Joule's heat by performing two-step energizing. In this study, the numerical simulation of the joining process for the two-step resistance brazing method has been carried out. A mathematical formulation and corresponding calculation scheme, which is derived from using the control-volume method, are developed for a model based on contact resistance between the filler metals plated on the surface of the base metals, and transient two-dimensional heat conduction with the Joule's heat generation. The calculated result, based on a base metal of type 304 stainless steel and plated filler metals of gold and copper, is discussed and compared with experimental data. 相似文献
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提出了支持工艺变型的产品结构建模和信息建模的方法,建立了支持工艺设计的零件族工艺模型.研究了基于零件族的工艺变型设计实现技术。 相似文献
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一种超声背散射信号模型及其计算机模拟 总被引:1,自引:0,他引:1
材料中颗粒(或微结构的不连续)造成的超声背散射信号是一种随机信号,这种信号的衰减特性与材料中微结构状态有关。本文提供了一种用于识别这类随机信号的数学统计模型,并介绍了一种时间平均法用来获取超声背散射信号的衰减系数。计算机模拟结果显示了该数学模型与时间平均法的有效性,本文所述方法可望成为一种简捷有效的材料微结构无损检测方法。 相似文献
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J.S. Ye Z.R. Ye A. Yang and Y.LuaSchool of Materials Science Engineering Shanghai Jiaotong University Shanghai China Ziyang Internal-Combustion Factory of Sichuan Ziyang China 《金属学报(英文版)》2002,15(6):561-568
A modified temperature-phase transformation-stress coupled 3D non-linear mathematical model and a series of subroutines on the non-liner MARC (MARC Analysis Research Corporation) are developed. Then this modified model has been utilized to simulate the heat treatment processes of 280 connecting rod of 16 V280ZJ diesel locomotive. The simulation results are basically in agreement with the experiments, which testify that the mathematical model and method are feasible. In addition, the simulation can not only obtain the transient temperature and micro structure of heat treatment process, but also provide a sound scientific basis for the heat treatment workers. 相似文献