摘要：
The sound attenuation in ER fluid was experimentally studied. The results show that sound attenuation of ER fluid could be adjusted by the particle concentration of ER fluid and the intensity of electric field. Amplitude of sound wave in ER fluid increases with the increasing of particle concentration and field intensity; on the other hand, the attenuation of sound wave decreases with the increasing of propagation distance, as well as the particle concentration and field intensity. The experimental results indicate that the solidification effect of ER fluid is beneficial to the propagation of sound wave.
摘要：
For improving the stability of kernel and husk separation machine of rapeseed, we had done some experimental research about vibrating fluidized classification technology. Based on experimental dates we had built the mathematics model and analyzed the classification effect influenced by the amplitude, the frequency and the material thickness and their interaction .The results indicated that when we maintained installation angle α = 0o and vibration direction angle β =108o of the vibrated fluidized bed, the best optimized combination of factors was the amplitude x1 = 1.87mm, the frequency x2 = 52.53Hz and material thickness x3 = 22.36mm.
摘要：
A rigid-flexible coupling dynamic model is established for the grinding roller system of an Horomill. Two coordinates are chosen to describe the grinding roller motion, namely the linear displacement of the roller at the center of mass and its rotation around the centroid on the applied plane of the grinding forces. The grinding forces applied on the roller are simplified to be a force and a torque, acting respectively on the direction of two coordinates. The frequency response function (FRF) matrices, with the two grinding force components as input and the vibration acceleration responses of two measuring points on the roller as output, are obtained respectively by using multibody dynamics computational software. The auto-PSD and cross-PSD of the vibration response on two measuring points are known. An inverse pseudo excitation method (IPEM) is then used for solving the grinding dynamic load spectrum. The obtained load spectrum would be helpful for the Horomill dynamic design and the fatigue calculation.
会议名称：
2nd International Conference on Advanced Engineering Materials and Technology (AEMT)
会议时间：
JUL 06-08, 2012
会议地点：
Zhuhai, PEOPLES R CHINA
会议主办单位：
[Li Xuezhong] Wuhan Polytech Univ, Sch Mech Engn, Wuhan, Peoples R China.^[Xie Zhiyu] Wuhan Zhongda Plast Co Ltd, Wuhan, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Blown Film Extrusion;Control System;Inverter;Programmable Logic Controller (PLC);Speed;Temperature;Tension
摘要：
Through analysis of the blown film extrusion production line process, according to the extrusion machine temperature, speed and membrane bubble cooling and tension control, and other aspects of control characteristics, using Mitsubishi FX2N series Programmable Logic Controller (PLC) and INVT inverter as an example, this paper expounds the application in the blown film extrusion production line control system.
摘要：
Precise measurement of shape parameters of gear components is of ultimate importance for performance and service life of machinery. The conventional manual methods with aid of measurement tools rely largely on experiences of testing personnel. This study aims at developing an efficient and automatic methods for gear measurements, based on Fourier analysis with image processing software OPTIMAS. The shape parameters of gear are conveniently derived from the polar coordinates and the Fourier coefficients obtained from the image analysis software. The automatic methods are applied to two types of gear for illustration. The macro written for this purpose is presented and the measurement results are compared with conventional methods. It has been proven that Fourier analysis is a reliable and cost effective method for gear measurement. In addition, the results of Fourier analysis can be used to determine other parameters to characterize shape and size of the gear.
摘要：
According to the physical characteristics and safety requirements, the evaluation levels of special electromechanical equipment were created. The five-layer neural network model was created according to the multi-layer neural network model. The first layer is input layer, the last layer is output layer, and the others are hidden layers. The software structure of evaluation system was designed, and the main class diagram was designed with UML. The relations among views, data model and dispatch controller were designed with MVC pattern. The factory method was used to instantiate view objects according to the object creation pattern. The ITERATOR pattern of structural pattern was used to find out view objects in the view object aggregation. The strategy pattern of behavior pattern was used to encapsulate different neural network algorithms.
摘要：
Ergonomically sound packaging machinery offers several efficiency-enhancing benefits, including reduced operating costs by avoiding work-related injury. This article discusses the common ergonomic injuries in packaging line, the risk factors for ergonomic hazards, and the ergonomic principles applied to the design of packaging machinery.
会议名称：
3rd International Conference on Engineering Design and Optimization (ICEDO 2012)
会议时间：
MAY 25-27, 2012
会议地点：
Ningbo Univ, Shaoxing, PEOPLES R CHINA
会议主办单位：
Ningbo Univ
会议论文集名称：
Applied Mechanics and Materials
关键词：
ANSYS;Finite Element Analysis (FEA);Press Casing;Screw Press
摘要：
The pressing chamber is the heart of the screw press, it forms the drainage barrel and has to contain the operating forces of the press. As press casing is an integral part of pressing chamber, the strength of the press casing ensures normal operation of the press. The mechanical models of pressing chamber of the ZX10 type press created in MATLAB 7.0 for linear programming, and the 3D model of the press casing created in UG NX4.0 software were imported into ANSYS 9.0 software and a linear static finite element analysis was performed. The visual deflection patterns the part experiences under "real world" loading conditions were obtained so as to complete the security check of strength.
关键词：
Road irregularities;Non-stationary random process;Time domain modeling;Wavelet analysis;Time-frequency characteristics
摘要：
By using time domain modeling obtained from PSD for stationary random road irregularities, concerning about non-uniform moving-vehicle conditions and non-stationary road characteristics, via model assembly and integration to generate non-stationary random road time domain modeling for inputting road excitation. On the assembly of the non-stationary random road time domain modeling, Time-Frequency was analyzed via wavelet analysis. From road data decomposed by the way of Wavelet, both time domain characteristics of signal components in different bands can be obtained and anomaly contained within the signal can also have accurately time-frequency localization. The signal separation can help achieving non-stationary sub-band analysis, and can further study the affection of road signal in different band focus on vibration response of the vehicle, and also providing a strong theoretical basis for road design, quality inspection and grading.
摘要：
The heat-transfer tubes and tube-sheets are the most complicated pressure parts in PWR steam generator. For analyzing the stress of heat-transfer tubes and tube-sheets, the geometry model of heat-transfer tubes and tube-sheet was constructed. The finite element grids were generated by ANSYS. According to operating temperature, the temperature field and temperature stress were calculated with ANSYS. The results show that the maximum stress is located on the inner wall of juncture of heat-transfer tubes and tube-sheet. According to the operating conditions of heat-transfer tubes and tube-sheet, the operating stress was calculated with ANSYS. The results show that stress changes on the juncture of heat-transfer tubes and tube-sheet.
关键词：
Carbonyl Iron Powder;Magnetorheological Fluid (MRF);Microwave Reflectivity
摘要：
In this paper, experimental study of the microwave reflection behavior in MRF was carried out. The results showed that at the same frequency the microwave reflectivity of MRF decreased with the increasing of magnetic field strength; and with the increasing of particle concentration, microwave reflectivity decreased, monotonously. Under the given magnetic field, with the increasing of microwave frequency, it first decreased, there is a lowest point at 9.2GHz, and then it increased. Usually, it is considered that the change of internal structure of MRF under external magnetic field is the main reason for the regulation behavior of microwave reflectivity.
摘要：
Rotary meat grinders with bone chip removal facilities are advanced meat mincing machinery, characterized by undesirable hard-particle separation from ground meat during grinding operations. The grinder plate with an involute spiral groove to facilitate removal of hard particles is developed. The perforated plate with bone chips removal facilities has a unique design including catcher groove, bone-collection chamber and bone-removal passage. Its 3D modeling in Pro/E software, machining process planning, milling path optimization, simulation based on MasterCAM and compiling post program were introduced and verified. The results indicated that adoption of CAD/CAM offers firms the potential to pursue new innovative strategies.
会议论文集名称：
The 2011 International Workshop on Internet of Things' Technology and Innovative Application Design(2011年国际物联网技术与创新应用设计研讨会IOT Workshop 2011)论文集
关键词：
impurities of coal;Combustion;Thermogravimetry
摘要：
The service condition of plane thrust bearing of worm shaft in an oil screw press was analyzed. The fracture failure of the bearing rings was systematically investigated through physical-chemical test, trace inspection, fractographic appearance, and metallographic structure analysis. The results showed that a great amount of network surface cracks near bearing ring edge, some dot shaped internal oxidations and secondary crack initiation, higher hardness, as well as the network carbides and coarse quenching martensites led to the early brittle fracture of the bearing rings. The further improvements were normalizing and isothermal spheroidizing annealing can eliminate the network carbides and improve the microstructure in preheat treatment process, and quenching temperature and heating time can not be too high and long in final heat treatment. Hardness of the material is preferably 60-62 HRC.
作者机构：
[王继焕] School of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430023, China;[刘启觉] School of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China
通讯机构：
School of Mechanical Engineering, Wuhan Polytechnic University, China
摘要：
Model parameters of a nonlinear mechanical system are identifiable if a unique relationship exists between its input-output behavior and the parameter values. The identifiability analysis of the parameters is one of the most important steps in the parametric model identification of nonlinear mechanical systems. The concept and two numerical approaches of analyzing the identifiability are presented in this paper. We propose that, via case studies, one had better check of the local identifiability of a parametric model at the identified parameter point using the numerical approach, when the parameter identification procedure has been finished. [DOI: 10.1115/1.4004062]
