The comparison of the induction motor rotor common fault simulation, the fault characteristics are obtained this kind of failure of the motor through theoretical derivation and simulation model is established in the fault condition of the motor based on the multi loop theory, the running state of a motor...

In order to improve the mechanical structure of the type of fault resolution precision high voltage circuit breaker spring mechanism, the paper analyzes the characteristics of the circuit breaker and the combination of mechanical vibration signal PSO algorithm (PSO) SVM parameter optimization method...

Aiming at the shortage of the actual experimental equipment, virtual reality technology was adopted for setting up an experiment system. The framework is the strange IoC and the engine is Unity3D for the system. A step operation of the experiment is divided into five parts, interaction behavior, interaction...

Dam parameter inversion tool based on ANSYS software and improved Genetic Algorithm is researched. Firstly, traditional GA is improved by introducing power function to rebuilt fitness function; Secondly, quick dam parameter inversion tool based on improved GA is programmed on ANSYS software; Finally,...

Flight or maneuvering at high angle of attack is one of the most important parts for the modern fighters. When the angle of attack is within the usual range, the aerodynamic characteristics have a linear relationship with the dynamic of aircraft. With the increase of angle of attack, the airflow separation...

With the development of city construction, civil engineering construction scale becomes bigger, safety problems is gradually serious. This paper introduces the main contents of construction mechanics and time-varying mechanics in civil engineering. We hope to analysis the safety problems in civil engineering...

In view of the serious impact on the starting process of the motor, the simulation experiment is conducted to study the influence of the diesel generator sets on steady operation.The diesel generator output voltage and frequency waveforms were analyzed by transient adjustment rate and the fluctuation...

It is found the hot forming quality has close related to the initial temperature of the pressing die, the blank, pressing speed, cooling rate and the friction between the part and tools. Through the design of orthogonal test and multiple regression analysis, the regression model of thinning rate and...

In order to obtain a deep understanding on the influence of process parameters on punch force evolution during deep drawing of AA6111 sheet at elevated temperatures, the design of experiment (DOE) and analysis of variance (ANOVA) were employed. The process parameters analyzed in this paper are forming...

As a result of the limitation of testing environment area and testing equipment, the existing the rigid structure of the feeding device or multistage hydraulic cylinder cantilever mechanism can't meet the requirement of the stiffness. A scale is developed relatively high stiffness and high cantilever...

Aims at AOCMT type five-axis ultra-precision CNC machine tool, the rotary axis geometric errors model is established by applying the homogeneous coordinate transformation matrix, a kind of errors measurement and identification method is put forward. It takes A axis as an example, using the function of...

CNC grinding machine is the most commonly used finishing machine, lathe bed is the foundation of the machine tool key parts, as well as the guarantee for the machine tool dynamic stiffness. Taking a CNC grinding machine lathe bed as the research object, using Pro/E software to create the geometry model,...

Fault distribution type identification and probability density function parameters estimation are the prerequisite of CNC grinding machine tools' reliability assessment. The procedure of fault data grouping,the technique of probability density function parameters estimation based on least square method...

ATLAS(A Toroidal LHC ApparatuS) is one particle detector at the large hadron collide (LHC), which is the world's largest and most powerful particle accelerator at the EUropean Organization For Nuclear Research(CERN) in Switzerland. ATLAS is intended to be a general-purpose detector, rather than focusing...

In many astrophysics black hole accretion disk systems, the episodic jet formed by the plasma group is observed, but its origin is not yet understood. On the basis of the MHD model, this paper adds the relativistic effect, develops a new magneto hydrodynamic model to study the nature of the episodic...

The test scheme of the magnetron sputtering CNx films was designed with the method of orthogonal experiment. The white-light interferometer was used to measure the surface morphology of CNx films. The effects of target current, duty ratio, nitrogen pressure, and bias voltage on surface roughness were...

Land subsidence caused by mining is increasingly severe. A novel land subsidence control technique for coal mining is proposed in this paper. Two longwall panels are offset on ends of each panel by adjusting panel layout which eliminates conventional coal pillars. Therefore, no wavy deformation occurs...

Longwall mining is the main method for coal extraction in China. However, development entry support on both ends of a longwall panel has always been a difficulty to cope with, especially in deep high stress conditions. In order to improve the stress environment for longwall entries, an innovative mining...

With the increasing of automation degree of mining machinery and electrical equipment machinery, Mining Machinery occupy an increasingly important position in security management. Without the safe operation of the electrical and mechanical equipment, safety production can not be guaranteed in mines....

Wet friction clutch is widely applied in shipping, heavy truck and other heavy machinery because of it has many advantages that smooth start reversing, big transmission torque, wear small, long life etc. It will improve the friction plate service life of car. Besides, there are many characteristics that...

Using the advanced modeling method of RecurDyn,in the planet gear of two freedom degree as an example ,establishing the flexible dynamic model,then,the dynamic simulation analysis.Draw out the stress distribution,the simulation and stress distribute results are closed to theoretical calculation values.The...

With the need of bolt parts automatically processing requirements for a manufacture company, an automatic production line of this parts was designed, also simulated and optimized. Firstly, on the basis of analyzing the process characteristics of bolt, the process route of it was established by considering...

In order to improve the reliability of high speed railway axle box bearing system, extend service life and reduce maintenance cost, the reliability analysis of high speed railway axle box bearing system was carried out based on the theory of system reliability design. Firstly, the reliability model of...

A multiscale model based bridge theory was proposed for the progressive damage analysis of carbon/epoxy laminates under couple laser and mechanical loading. The ablation model was adopted to calculate ablation temperature changing and ablation surface degradation. The polynomial strengthening model of...

The accuracy retainability is becoming an important performance index of machine tool, and how to improve it is a tough problem faced to manufacturers and users. Generally, it needs to measure the errors termly and repeatedly during the specified period to analyze the timeliness machining accuracy retainability,...

In the design process of modern advanced propeller or prop fan, tip induced loss has been the foremost cause of power cost and its natural of difficulty in quantization also causes the deviation of power on the design point. Based on the former research and combined BEM method with the Tip-Loss Factor,...

For the nonlinear vibration response problems of aerospace thin-walled structures to thermal-acoustic excitation, the theory of structural-acoustic coupling and the coupled FEM/BEM method were used to analyze dynamic response characteristics of super-alloy thin-walled rectangular plates with four edges...

Many situation demand a high precision, low cost and robust navigation for Land-Vehicles. Real Time Kinematic (RTK) satellite navigation is a technique that can provide up to centimeter level accuracy. But in the condition of poor visibility of satellites, the function of RTK is limited. To achieve a...

Based on the results of the nonlinear parametric analysis interview, some design suggestions of light frame shear wall are put forward from studs spacing, height-width ratio of wall, the size and position of the openings. In addition, a real example is studied and analyzed on the design and optimization...

It is known that China is a country with rich natural resources and vast territory. Even though, the resource stock is declining in the growing process of every industry. Focusing on current resource lackage situation, recycling on resources attracts more attention from the public. Reproducing is one...

In the symmetry of mechanical system, we explored and made researches of related applications and the roles of mechanical principle decomposition symmetry, applied it to the real innovative product design. We established principle of space-time symmetry and principle of effect symmetry in the mechanical...

Machinery equipment lightweight component weighs a lot in machinery equipment design and production. It can efficiently improve equipment's performance in environment-protection and energy-saving. Researches and progress in lightweight component has drawn extensive concern from many experts in China...

In this paper, the static and dynamic equations of the blade are derived, the comparison between analytical method and finite element analysis results. Finding the error of the two methods is less than 1%. The influence of the distribution characteristics of the blade crack on the static and dynamic...

The characteristics of spatial structure and winding forming principle of braided wire rope under bending condition are analyzed. Establish the local coordinate system of the wire rope strand and the center line of the strand.The transformation matrix of each coordinate system is derived by using the...

In China, the sports exercise of college students is generally learned in sports class and mainly dominated by amateur workout, which is in a disordered state. This paper introduces the supporting system of aid decision making on sports training of college students established by adopting data warehousing...