Search results

Strength and mode analysis of testing machine of 3MW wind turbine bearing with finite element method Duan Zhenyun1,a, Wang Ying1,b, Hong Mingdong2,Ren Guofang2,c 1School of Mechanical Engineering, Shenyang University of Technology, Liaoning, 110870, China 2Liaohe Oilfield, Liaoning, 124010, China a duanzhenyun@yahoo.com.cn, b wangying87621@163.com, c rgf2000@sina.com Key words: wind turbine bearing; key components of testing machine; strength; mode analysis.
The static strength and dynamic properties of testing machine key components of 3MW wind turbine bearing were analyzed with the finite element software ANSYS to obtain the strength and stiffness check as well as the optimizing design of testing machine key components of wind turbine bearing.
The strength was checked and satisfied with the demand of material strength.
Material Properties The material of bearing testing machine was Q235, the elastic modulus was 2.1×105 MPa, Poisson's ratio was 0.3, the density was 7.85×10-6kg/mm3, yield strength σs was 235MPa, ultimate strength σb was 500MPa.
As shown in Figure 2, the maximum stress of the bearing frame and left loading frame are respectively 95.984MPa and 118.928MPa, [σ] is the allowable stress values which considered the material safety factor and the shape factor, [σ] =σs/s. σs is yield strength of the material, σs = 235MPa; s is the safety factor.

A Novel Integration of GNSS and GIS Approach to Foundation Roller Compaction in Civil Engineering ChenCheng Weng1, a, Hao Wu2, b, XiaoDong Liu3, ZhaoYu Du4, Lei Shi5, YunQiang Feng6, Jian Yang1, LingYun Yuan2 1School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China 2School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China 3China Trans Geometrics Co., LTD; Beijing 100101; China 4The Fifth Survey and Design Institute (Group) CO., LTD. of CRCC; Beijing 102600; China 5 China Railway Seventh Group CO., LTD; Zhengzhou 450016; China 6 China Railway Eighth Group CO., LTD; Chengdu 610081; China awengchencheng@163.com, b 9743723@qq.com Keywords: GNSS.
Introduction In the process of large civil engineering, many involving foundation roller compaction, mainly including dump trucks transport, bulldozers paving, large the road roller rolling, and cooperate with small vibration compaction equipments compaction [1, 2, 3].
Therefore, it is necessary to study a real-time, continuity, automation, high precision roller compaction quality monitoring system, in order to adapt to the construction quality management requirements of large engineering rolling.
Z: Engineering of Surveying and Mapping Vol.15 (2006), p. 23
L: Advanced Materials Research Vol. 291-294(2011), p.2805

Study on Key Techniques of Control System for Dry-mixed Mortar Production Line Huan Zhang College of Mechanical and Electronic Engineering, Qingdao Agriculture University, Qingdao,Shandong,266109,China huan0804@163.com Keywords: Dry-mixed Mortar, control system, PLC, weighing instrumentation, intelligent adjust algorithm Abstract.
Generally, dry-mixed mortar is made of gel materials, aggregates and various additives and other components.
The role of gel materials is to aggregate and other particles bonded together and bonded at the base roots level.
Gel materials in dry-mixed mortar are used with cement, gypsum and hydrated lime and so on.
After making up and weighing of ingredients, hopper weighing of raw materials in the mixer with a screw conveyor into the top of the hopper.

This review focuses on current research on application of chitosan as scaffold material of construction in vitro. 1 Introduction Tissue engineering consists of three major elements, namely seed cells, growth factors and tissue engineering scaffold[1].
Chitosan become one of the most beloved materials as a natural scaffold material because of its ability to mimic the extracellular matrix.
What is more, raw materials are simple and easy to get.
It is often used to carry and inoculated the cell for it has many hydrophilic and it is conducive to cell adhesion. 2 Application of Chitosan scaffold in tissue engineering Chitosan scaffold has been widely used in bone tissue engineering, cartilage tissue engineering, nerve tissue engineering, skin tissue engineering and so on.
[6] Krajewska, B., Membrane-based processes performed with use of chitin/chitosan materials.

Decoration engineering as an important force in building industry, it has been plagued by low levels of technology management, engineering and serious waste problem over years, how to optimize the process to achieve value added decoration has become an urgent problem.
Construction phase construction plan is to continue to improve and strive to the best total cost of inputs complete layer content. 4 Decoration Engineering Value Optimization System Index (1) direct value indicators of decoration engineering Direct index of the decoration project including labor, materials, machinery, etc., according to the characteristics of the decoration engineering, artificial and materials is the most important.
Decorative materials and complex, the quality and the grade difference, decoration engineering materials and to receive the objective influence of owner, therefore, adornment material is relatively difficult to control.
Architectural decoration project cost of raw materials occupies most of engineering cost, on the material analysis can from cost of raw materials, the material is common, project material processability, etc were analyzed
Reference [1]Jia xiaohui.Research on Design and Application of Decoration Engineering Based on Value Engineering[D].Chongqing University,2010

Investigation on Axial Turning-Grinding of Engineering Ceramics Xinli Tiana,Fang Guob ,Yatao Maoc,Jianquan Wangd ,Sen Xue and Shu Zhangf National Key Laboratory for Equipment Remanufacturing Engineering, Academy of Armored Forces Engineering, Beijing,100072,China atianxli719251@sohu.com,bpuzzlele@tom.com,cmaoyatao666@163.com, djianquanwang0514@yahoo.com.cn, exusen.1985@163.com,fzhangshu5799@163.com Keywords: Engineering ceramics; axial turning-grinding; annularity tool; removal mechanism Abstract.
The primary cutting zone, the main material removal area, bears the main cutting force, and materials in this zone broke into debris in large-scale.
Engineering ceramics is a compound made of metal or semi-metal atoms and nonmetal atoms in the form of ionic bond or covalent bond with high hardness and chemical stability, but lower toughness, and it’s a special hard- brittle material.
Conclusions From above analysis, the following conclusions could be drawn: (1) Axial turning-grinding of ceramic materials is a practical method, which could greatly improve the efficiency of ceramic materials processing and reduce processing costs.
Materials Science and Engineering,2003,A345:155-163

The Research On Pure Water Hydraulic External Gear Pump Dexin Zhao,Ruibo Yuan and Jing Luo College of Mechanical and Electrical Engineering Kunming University of Science and Technology Kun Ming City Yun Nan Province E-mail:zhaodexin123@126.com, kmust_yrb@163.com, yuanrb@126.com Key Words: Pure water hydraulic; External gear rotary pump; Engineering material; Surface treatment; FLUENT Abstract:This article describes the structure of pure water hydraulic external gear pump, structural design and calculation of parameters,analysises the mai spare part material of pure water hydraulic external gear pump and determines the type of the new engineering materials.
optimum axis-direction clearance of pure water hydraulic external gear pump is about 1/6~1/10 of hydraulic pump, usually less than 5μm. 1.3.2 The optimum radial clearance 13 14 15 After being cleaned: 16 —the leakage of the radial clearance(l/min); δ—the radial clearance between top of tooth and shell（m）; —crest width（m）; IF , SO: 17 SO: 18 is getted from the most efficient of the radial clearance, in actual life, normally we can get the value from 0.03~0.1mm[4]. 1.4 Trapping phenomenon and off-load measures In order to reduce trapping phenomenon, the most commonly used method is opening a relief notch on the end cover(or pleuron shaft sleeve bearing race).So we chose the double rectangular relief notch.In addition,we also take some measures to play compensation. 1.5The key
Speed（r/min） 4000 dead slow（r/min） 1400 Rated volumetric efficiency condition ≧85% 2 The choice of materials and surface engineering analysis to pure water hydraulic external gear pump 2.1 The choice of materials to pure water hydraulic external gear pump Shell and pump cover are made in wrought aluminum alloy,gear are made of stainless steelor, The compensation side plates are also made in wrought aluminum alloy, bearing uses SF-1 compost bearing material, sealing is made in carbon and graphite material. 2.2The surface engineering analysis to pure water hydraulic external gear pump Gear:chose the nanoscale composite ceramic of surface coating technology Shell:chose the micro-arc oxidation in the surface of the ceramic self-lubrication coating. 3The simulation and analysis to pure water hydraulic external gear pump by FLUENT Set the parameters and conditions: The import size of gear model is 13mm, export size of gear model is 10 mm, tip diameter is 36mm,the number of gear
teeth is10, heoretical flowing capacity is 8mL/r, rated pressure is 14Mpa, rated revolution is 3500r/min, FLUENT start to calculate, curve of residual error is: Figure 6 curve of residual error Summary: Through this paper’s study,the material of pump,structural parameter,and surface science and technology of materials of the pure water hydraulic external gear pump meets the design requirements for gear pumps,can be applied in the industrial production.

Physical exergy is categorized into thermo-mechanical and mechanical exergy, and chemical exergy is a specific property of materials, whose value changes depending on the environment [5].
The constituent components specify the quantity of specific heat values of subcomponent materials, which are representing the net enthalpy contribution carried by an electronic component.
ASME 2015 International Mechanical Engineering Congress and Exposition.
American Society of Mechanical Engineers, 2015
Applied Mechanics and Materials Vol. 655, 2014 [8] Schenk, M.; Wirth, S.; Müller, E.: Fabrikplanung und Fabrikbetrieb: Methode für die wandlungsfähige, vernetzte und ressourceneffiziente Fabrik.

China afanjun@sqc.edu.cn, blgwang@ujs.edu.cn Key words: reverse engineering; retrofit design; precision control Abstract.
The precision control is the key technology for reverse engineering.
Various errors generated in the reverse engineering are random, meeting the normal distribution law.
Conclusions Precision control is the key issues in the study on the reverse engineering, and in the whole process of the reverse retrofit design of the product.
[5] Wang Yuan,Fang Jian-guang,Wang Jing–ren,et al: Automotive Engineering, Vol.34(2012), P.847

Falling Estimation Based on PoseNet Using Camera with Difference Absolute Standard Deviation Value and Average Amplitude Change on Key-Joint Muhammad Idris Siddiq1,a, Achmad Rizal1,b, Bayu Erfianto2,c, Sugondo Hadiyoso3,d 1School of Electrical Engineering, Telkom University, Indonesia 2School of Computing, Telkom University, Indonesia 3School of Applied Science, Telkom University, Indonesia amuhammadidrissiddiq@student.telkomuniversity.ac.id, bachmadrizal@telkomuniversity.ac.id, cerfianto@telkomuniversity.ac.id, dsugondo@telkomuniversity.ac.id Keywords: Elderly, Fall detection, PoseNet, Average Amplitude Change, Key-joint.
Materials and Method The proposed method can be seen in Fig. 1.
The result of this technique is to estimate the position of key joint xy-coordinate in 17 key points which can be seen in table 1.
Key-point in PoseNet Fig. 3.
In PoseNet, the key-joint has been generated using MossbileNet, making it easier to determine the key-joint to be used.