In this paper,we studied a process for the rotationally molded truck fender . The part’s impact strength, the melt flow index and bubbles inside the part are all affected by the heating temperature and time, all of which are analyzed. Finally, the optimized process conditions were given. The result...

this article from the analysis of total pressure in the flow field in the directional scanning is detected by the pressure signal, this paper discusses the color image technology is used to do high density scanning imaging space complex vortex system. The image has a complete structure, image is clear,...

Test the Magnetorheological Fluids (MRFs) that prepared with carbonyl iron powder as soft magnetic particles and dimethyl silicon oil as carrier fluid by Rheometer Physica MCR 301. The experimental results demonstrate that the shear stress of MRFs increases slowly with the increase of shear rate. With...

Based on the principle of bionics, this paper designs a hexapod walking device by using a crank rocker mechanism. The designed structure can perform some basic walking operations, such as forward and backward place, turn left, turn right and so on. Furthermore, the triangle gait principle of the hexapod...

In daily production and life, the centrifugal pump plays an important role, but its vibration noise has influenced humans’ mind and physical health. This paper adopts the vibration noise of the centrifugal pump as the research objective, analyzing how to reduce noises. The focus of this paper is on...

With the continuous improvement of people’s living standards, there has been a higher requirement of buildings’ construction level. In order to create a favorable living space, the current construction departments should emphasize on optimization of water supply and drainage system design during...

This paper raises the question of the status of the building waterproofing and the facing technical route background and significance of the research, content and research. On the basis of the current problems in the domestic construction waterproofing industry development and management analysis on...

At this stage, the social and economic progress leads the building industry into a new period of development of civilization. Indicators of buildings is an important aspect to measure the building urban development, for people's production and life has a very important role, it will also affect the environment...

Based on the purpose of the comfort zone of the drivers’ body angle and on the basis of evaluation principles in analyzing the human-machine adaption capacity, this paper puts forward the systematic and practical index system for the driving operation comfort evaluation. Facing the uncertain factors...

In this research work, a novel spatial parallel manipulator with three degrees of freedom (DOF) is proposed. The moving platform has two-translation and one-rotational DOFs with respect to the fixed base. Based on the position and orientation characteristics (POC) theory, the number of the DOF is computed...

In this paper, the research status of the tandem warhead at home and abroad is reviewed.The arming types and the corresponding principles for the fuse are introduced.The present situation and the research emphasis of the research on the influence of the front detonation field on the rear - level are...

Without modification or a small wheeled vehicles converted premise modular rubber track system can be a direct replacement tire wheeled vehicles, so that it becomes tracked vehicles, thus increasing its off-road performance.Frame as a key component of the modular rubber track system, supporting all other...

Transportation has a rapid development with the stimulus of electronic commerce. As the internet economic hold dominant position, freight characterized by mass high added value, strong timeliness demand has been in strong demand. The world railway transportation presents the trend of logistics. Based...

The identification model of milling force coefficient is established using the model of dynamic milling force and the regression analysis of the milling force experiment data. On the basis of the existing milling force model, by simplifying and calculation, it can get the relational expression between...

The battlefield environment, external vibration load condition is complex, in the process of vehicle and shooting, random vibration and impact load can lead to car sight structure stress and strain of the primary mirror, will affect the performance of the vehicle sights. Aimed to study the vibration...

In view of the disadvantage of the current method for target detection that poor efficiency and poor real-time, a novel method of target detection based on digital image processing technology was proposed. The traditional normalized correlation template matching algorithm was improved via setting optimal...

Component structure design is based on the finite element analysis technology, and the structure optimization is obtained by the iterative process of the boundary. However, this method is time-consuming and expensive to deal with the numerical simulation or complex engineering problems. In this paper,...

Computer identification on handwritten Chinese characters is one of the most difficult problems in the field of pattern recognition.In order to improve the efficiency of identification of Chinese character recognition software and realize the automation and intelligenceof the software, it is necessary...

For the reliability problem of the 90 ° bend optical fiber embedded FR4 substrate in the bad service environment especially for military, the easily failure area of this modal under environments of random vibration and characteristics of interface cracks extending are researched. Firstly, modal analysis...

The vibration characteristics of bracket structure in automatic drill-riveting system have great effects on the final quality of aircraft panel. Modal analysis can be used to determine the vibration characteristics of mechanical system. After briefly expounding the basic theory of modal analysis, a reasonable...

In order to study the change condition of the influence on the centrifugal compressor blade field, we change the size of the centrifugal compressor inlet flow and the centrifugal compressor impeller rotational speed,using the realizable κ-ε ii equation model to do the steady numerical simulation for...

The pressure pulsation of network can be reduced effectively by using buffer,discussing the effect of the tangential inlet buffer and radial buffer with different outlet conditions. The reason that affects buffer performance can be gotten through the analysis of internal flow flied and fluid path lines...

In this paper, it’s based on the acceleration and strain data from the test of a city railway vehicle .This paper introduced how to carry out the excitation from the center pivot, air spring and couple by numerical integration and finite element model and get the external load of the car body.

Rail-defect detector car compared with the artificial detection device has many advantage. This paper presents a certain type of rail-defect detector vehicle bogie’s Strength analysis. The finite element analysis software ABAQUS is used to setup the finite element model of bogie frame and analyze frame...

Environmental problem has become a major challenge for the survival and development of human society in twenty-first Century, and it has become the consensus of the community that the green product is considered to be the only way for the sustainable development of human beings. Fuzzy AHP is an effective...

The level of floor management can reflect directly operating conditions of enterprise. Therefore, it’s crucial to improve floor management for development of enterprises. Workshop equipment layout design is an important part in the planning of the manufacturing system, the result have a deep influence...

Based on the research background of enterprise workshop, the evaluation index system is set up, Analytic Network Process(ANP) is used, Decision Super computer software to determine the weight of indicators for the lean workshop level made a qualitative and quantitative research, which leads the enterprise...

Heat transfer and pressure drop in an all-welded plate heat exchanger with ripples have been experimentally investigated in this paper. The ripples were corrugated by the way of special machine. The heat transfer coefficient and pressure drop was experimented, and also calculated by the wall temperature...

Nowadays, the high speed train develops very fast and it has irresplaceable traffic advantages. However, the collison damage of the high speed train body[1], which mainly includes the towing beam ,boundary beam and sleeper beam, is a major obstacle to the development of the high speed train, so the reserach...

Heavy-duty gantry machine plays an important role in the energy, shipbuilding, aerospace, transportation and military industry and other pillar industries, and is a manifestation of national equipment manufacturing capacity. Cross-rail is one of the key structural components, and its natural frequency...

Around CRH380 EMU bogie assembly, considering the bogie structural characteristics, grouping, object-oriented modeling, 3D animation, multimedia technology combine design a set of virtual assembly bogie animation method using Pro/E, build three-dimensional parts assembly model and virtual assembly.3ds...

As limited by the size and load, multi-array antenna can not be installed in the helicopters to achieve forward-looking SAR imaging. A "bistatic" forward-looking imaging program is proposed, which used a satellite to carry illuminator and a helicopter to carry receiver. Then the forward-looking SAR geometry...

To contact constraints model of soft finger, replacing paired friction cones by linear paired polyhedral, so as to realize the linearization of contact constraints model. The linear constraints inequalities of grasping forces is derived, and the objective function of the smallest sum of output torque...

To improve machining accuracy of CNC spiral bevel gear grinder, there were two main ways: spatial error compensation of CNC spiral bevel gear grinder and tooth profile error compensation of the spiral bevel gears. Based on spatial error detection and compensation principle, laser doppler displacement...

This paper introduces the diesel engine supercharger technology which is used most commonly. Turbocharger system can effectively improve power and torque of diesel engine, but the turbo hysteresis exists. Mechanical supercharging system can boost at low speed, but the efficiency is lower. Electric supercharger...

Flatness set curve is the target of strip flatness control system which represents the desired strip flatness quality. If the longitudinal residual stress along the transverse distribution of the strip can be measured accurately by the flatness measuring roll, the actual flatness can be controlled accurately....

The paper aims at knowledge management and application problems during the diesel research process, reviews the development of ontology in the Semantic Web domain, analyzes the requirement of the knowledge ontology frame, puts forward the diesel domain ontology candidate principle, constructs the whole...

The rotor system is an important part of the aircraft engine, its running state directly influences the whole engine working condition. Therefore, the reliability analysis of rotor system is particularly important. Paper combines the vibration characteristics of the equipment operation condition with...

Research on ship motion control as the main design issues, the controller design is a vital part of the ship. in modern society, the ship sailing economy, safety and comfort controller has an important relationship with ship. many researchers at home and abroad have been unremitting efforts to improve...

A kind of integral sliding mode surface method is firstly used in the height loop of airship system based on the assumption that the pitch angle control loop is stable. The expected pitch angle signal is caused by the sliding mode surface which is produced by height error .Compared with traditional PID...