期刊：
IFIP Advances in Information and Communication Technology,2014年420:145-151 ISSN：1868-422X
作者机构：
[Zhang, Ning; Zhao, Manquan] Mechanical and Electrical Engineering College, Inner Mongolia Agricultural University, Hohhot, 010018, China;[Liu, Yueqin] Mechanical and Electrical Engineering of Inner Mongolia Technical College of Mechanics and Electrics, Hohhot, 010070, China;[Shi, Yanhua] College of Mechanical and Electrical Engineering, Wuhan Polytechnic University, Wuhan, 430023, China
会议名称：
7th IFIP WG 5.14 International Conference on Computer and Computing Technologies in Agriculture, CCTA 2013
会议时间：
18 September 2013 through 20 September 2013
关键词：
ANSYS workbench;Double disc mower;Finite element analysis;Optimization design;Virtual Prototyping
摘要：
A new method for partial eigenstructure assignment using acceleration and displacement feedback for undamped vibration systems is presented in this paper. Firstly, a necessary and sufficient condition is proposed for the incremental mass and stiffness matrices that modify some eigenpairs while keeping other eigenpairs unchanged. Secondly, based on this condition, an algorithm for determining the required control gain matrices of acceleration and displacement feedback, which assign the desired eigenstructure, is developed. This algorithm is easy to implement, and works directly on the dsecond-order system model. More importantly, the algorithm allows the control matrix to be specified beforehand and also leads naturally to a small norm solution of the feedback gain matrices. Finally, some numerical examples are given to demonstrate the effectiveness and accuracy of the proposed algorithm. (C) 2013 Elsevier Ltd. All rights reserved.
摘要：
In this paper, in order to design a cam mechanism be up to the mustard, a set of methods are put forward that using the Visual Basic programming language based on solidworks to draw cam contour line and then get its 3D models and generate the cam motion simulation by the solidworks motion. In the end, it’s proved that the cam designed though this method met the requirement.
摘要：
Based on the dynamic analysis of 5XF150/180 type grain cleaning machine, the two sieve bodies' boundary conditions for finite element analysis are determined. The natural frequency and vibration mode of sieve bodies were identified by modal analysis by the use of ANSYS Workbench. Based on the result of modal analysis to make harmonic response analysis, the steady-state kinetics characteristics under the actual working frequency can be determined. The results verify the reasonable of the design and selection of main dynamic parameters of vibrating screen.
期刊：
Applied Mechanics and Materials,2014年530-531:911-914 ISSN：1662-7482
作者机构：
[Yu, Nan Hui; Li, Shi Long; Liu, De Wen] School of Mechanical Engineering, Wuhan Polytechnic University, Wuhan, 430023, China
关键词：
Finite element analysis;Pressing screw;Screw press
摘要：
Screw pressing technology provides a pressing process superior to those traditional ones. Screw press has been used in oil extraction with a long history, both for cold and hot pressing of vegetable oil materials. Pressing screw is the core component of screw press, as a very important working part, its strength is a precondition for ensuring normal operation of the whole machine. Considering the complexity and drawbacks of conventional analysis and check methods for pressing screw, a simplified three-dimensional model of which was set up, then finite element analysis was done, thus obtaining its continuous deformation and stress distribution with the results close to those from theoretical calculation. Hence, this method can be applied to rapidly and correctly find those dangerous positions and existing imperfections of its structure, thus providing valuable data to judge its structural rationality before practical manufacture, so as to make further improvements and optimizations for its structural design.
