共查询到20条相似文献,搜索用时 203 毫秒
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文中对离心式旋转机械轴向力在线监控装置作了简单介绍,然后详细介绍了一种离心泵轴向力在线监控装置测力弹性元件的优化设计,为了保证测力传感器的性能,采用有限元法计算了不同结构及尺寸的弹性元件在轴向力F=39.2kN时的应力、应变及垂直位移的分布,在此基础上优选了最佳的弹性元件结构及最佳的电阻就片贴片位置,显著地提高了测力传感器的灵敏度,并通过实验得到了验证。 相似文献
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齿轮类零件整数全局优化设计系统开发 总被引:1,自引:0,他引:1
采用整数全局优化设计方法对齿轮类零件进行优化设计计算,根据得到的设计结果计算出齿轮各部分的结构尺寸,绘制出齿轮零件工作图。实现了整数全局优化设计与参数化绘图的一体化。 相似文献
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本文应用新的应变分析法——云纹法对两种电测传感器弹性元件进行了应变场测定,获得了弹性元件的应变分布规律;根据测定结果进行了弹性元件的贴片位置分析和一种新型弹性元件系列尺寸设计。 相似文献
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对六维力/力矩传感器弹性体结构进行了分析;提出了基于Stewart平台的球铰接分体式弹性体的设计方案;根据力的叠加原理对传感器分别施加单轴力,分析得到最大受力杆;并利用Matlab软件分析计算系数转换矩阵,得到施加的力与六维力之间的转换方程;调整上下平台夹角α、β及杆长L等参数,对传感器结构参数进行优化设计,得到设计数据表;为Stewart六维力传感器结构参数的选择及优化提供了参考依据。 相似文献
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Woo-Gon Kim Jae-Young Park Seon-Jin Kim Min-Hwan Kim 《Journal of Mechanical Science and Technology》2014,28(8):3027-3032
This paper presents an improved methodology for calculating tensile elastic and plastic strain components in total creep strain, which are needed in the generation of the isochronous stress-strain curves (ISSC). The procedures for the RCC-MR code and Blackburn’s methods to determine the total strain are analyzed in detail, and a new method is proposed to determine the tensile elastic and plastic strain components. To practically obtain the tensile elastic and plastic strain components for Alloy 617, high-temperature tensile tests were conducted at 800, 850, 900, and 950°C. Using the tested data, three methods of the RCC-MR code, Blackburn, and the newly proposed method were applied and compared. In the elastic regime, the three methods were identical in the tensile curves, but in the plastic regime, Blackburn’s method was higher in the stress-strain curves than the RCC-MR code. The difference gap for the two methods was larger with an increase in the plastic strain. In addition, the proposed new method revealed almost midway values for the two methods. It was suggested that the proposed method is useful to determine tensile and plastic strain components. 相似文献
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This paper describes a computational method to calculate the friction force between two rough surfaces. In the model used, friction results from forces developed during elastic deformation and shear resistance of adhesive junctions at the contact areas. Contacts occur between asperities and have arbitrary orientations with respect to the surfaces. The size and slope of each contact area depend on external loads, mechanical properties and topographies of surfaces. Contact force distribution is computed by iterating the relationship between contact parameters, external loads, and surface topographies until the sum of normal components of contact forces equals the normal load. The corresponding sum of tangential components of contact forces constitutes the friction force. To calculate elastic deformation in three dimensions, we use the method of influence coefficients and its adaptation to shear forces to account for sliding friction. Analysis presented in Appendix A gives approximate limits within which influence coefficients developed for flat elastic half-space can apply to rough surfaces. Use of the method of residual correction and a successive grid refinement helped rectify the periodicity error introduced by the FFT technique that was used to solve for asperity pressures. The proposed method, when applied to the classical problem of a sphere on a half-space as a benchmark, showed good agreement with previous results. Calculations show how friction changes with surface roughness and also demonstrate the method's efficiency. 相似文献
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利用APDL语言对ANSYS软件进行二次开发,建立楔环连接结构的参数化有限元模型。为了对该结构进行优化设计,以楔环径向和轴向尺寸为设计变量,以结构最大应力比为目标函数设计结构的增强优化方案,以结构的各件应力比差的平方和为目标函数设计结构的等强设计方案。采用基于共轭梯度法的一阶优化方法求解,增强优化的结果表明,拉伸载荷下结构的最大等效应力降低21.1%,安全系数由1.08提高到1.37,可达到增强设计目的;等强优化的结果表明,优化后结构各件应力比接近,应力比差的平方和从0.600降为0.067,可以达到等强设计目的。实践说明采用非线性有限元法和一阶优化法对连接结构进行优化能够取得预想的效果。 相似文献
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参数化CAD/CAE集成与应用 总被引:1,自引:0,他引:1
本文在参数化建模和基于结构参数化有限元分析思想的基础上,比航空发动机典型零件鼠笼式弹性支承为例,讨论了参数化建模、参数化有限元分析在商业软件二次开发语言UG/OPEN GRIP和APDL(ANSYS Parametric Design Language)中的实现方法,并且利用VC程度对参数进行控制,实现参数化建模、参数化有限元分析的集成,使得设计分析成为一个整体。结果表明,该法实现了CAD/CAE的结合,缩短了机械产品的设计分析周期,减少了设计分析人员的工作量。 相似文献
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讨论了线阵传感器在舰船动力装置弹性元件冲击位移测量中的应用情况.首先阐述了应用线振传感器进行弹性元件冲击位移测量的原理及测量方法的技术特点.并结合某型舰用弹性联轴器冲击位移测量的实例,验证了该测量方法的可行性,指出了测量方法工程应用前景.研究成果可应用于橡胶隔振器、弹性联轴器、挠性接管等舰用弹性元件冲击位移测量. 相似文献
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J. R. He G. C. I. Lin 《The International Journal of Advanced Manufacturing Technology》1992,7(4):210-217
A computerised trace method has been developed for determining the relationships of assembly requirements with design dimensions
and tolerances of the components in an assembly, and the relationships of design specifications and machining allowance requirements
with manufactured dimensions and tolerances of the component in a process plan. This method traces from the proposed components
or planned operations only the dimensions and tolerances that affect the given requirement, and therefore the equations for
design or for manufacture can be established simultaneously and accurately. Hence it is possible to establish constraints
for the optimisation of dimensions and tolerances for design or for manufacture. 相似文献