Thousands of motor models are assembled in the vehicles. It is necessary to study the distribution characteristics of motor rated power to check the vehicle plants have obeyed the optimal designed methods. Some passenger car samples of body length shorter than 6m have been analyzed. Construct statistics...

This paper presents the intrinsic fluorescence characteristics of vitamin B1 and vitamin B2 with 3D fluorescence Spectrophotometer. Three strong fluorescence areas of vitamin B2 locate at ex/ em=270/525nm, 370/525nm and 450/525nm and one fluorescence areas of vitamin B1 locates at ex/ em=370/460nm were...

The 2180 mm tandem cold rolling mill is one of the widest cold mills in the world, and it improves the output and production efficiency largely, but some problems puzzle the production such as shape problems of strip, especially the limit width specification. In order to solve the problems, it is necessary...

The dynamic characteristics of the rotary axis feed system has influence on the contour error. This paper presents a mathematical model of rotary table drive system of the CNC machine tool by using of mechanical dynamics. The model includes the simulation model of AC servo motor and the rotary table...

For the 12,000KN fine-blanking machine’s complexity, instantaneous, heavy stress conditions and fine-blanking die’s high-precision, which puts forward a high stiffness requirement of the equipment, the structure of fine-blanking press frame was designed, and its finite element analysis model was established....

Due to the influence of the normal angle on the thickness uniformity for the concave combination with two flat patches, considering the paint spread impact on the thickness uniformity, a new spray trajectory optimization scheme for the concave combination with two flat patches is developed. The paint...

Temperature field analysis of laser micro-drilling is a nonlinear transient thermal conduction problem with phase changing. In this paper, first the temperature field is simulated with ANSYS finite element analysis software, thus obtaining a three-dimensional temperature field distribution. By analyzing...

According to the structural characteristics of planetary gear transmission in the field of high-power tractor, a statics of calculative model for the load distribution of planetary gear transmission system is established. With the theory of equivalent mesh error, the main factors which affecting the...

It designs a kind of 38 pump having a sand control ability, strong corrosion resistance, equal diameter and depth on the premise of meeting the needs of the special wells in oil fields. This pump can satisfied with the design requirements, such as well depth is at least 2500m, oil well pump plunger stroke...

The effect of detergents on the quality and flavor of fresh-cut perilla was evaluated. The acidic electrolyzed water and sodium hypochlorite extended the shelf life of the perilla to 11d. The sodium hypochlorite treatments was more effective to avoid the loss of the greenness of the perilla leaf compared...

The water entry of torpedo based on FE-SPH coupling method was studied. Firstly, the model of water entry of high-speed torpedo is established. In the case of grid structure, the numerical simulations verify the effectiveness of the model by comparing with the experimental results. Then the impact forces...

Now Tahe oil field has reached the middle development stage and the improved wells in the oilfield are increasing gradually. Ahead of perforation change and running the perforation string, wiper trip, soft dip and wellbore depth check are necessary jobs. The new multifunction drift well gauge tool, combining...

The engine friction loss and vehicle fuel economy aiming at several kinds of energy-conserving engine oils with different quality standard, viscosity grade, friction modifier, and viscosity index improver were tested in this paper. Experimental results showed that the engine friction loss was reduced...

LED luminaires, the research object, is the new energy industry products. And aiming at the lifetime prediction and reliability evaluation of LED luminaires, a novel dual-stress accelerated life tests were designed and lifetime models were developed. The temperature and vibration were selected as the...

AMT (Automated Mechanical Transmission) has been used in heavy-duty trucks for its high efficiency, low cost and high torque. In this paper, AMT is used as a soft-starting device to start up upward conveyors softly. On the basis of dynamic characteristics, clutch torque control strategy is put forward...

A thick tip foil blade was designed to reduce the tip leakage flow and weaken the tip vortexes in ducted propeller 19A/Ka4-55. The thick tip foil was constructed by normal extrusion of the original tip foil. The maximum thickness of the foil increased from 1.64% chord length to 7.64%. The commercial...

Cucumber, a common economic crop, occupies a large proportion of vegetable cultivation in China. Plant diseases and insect pests, especially the cucumber downy mildew, are important causes for the decrease in the yield of cucumbers. In order to reduce the losses caused by pests and diseases and achieve...

By means of mechanic analysis, the contact stress analysis along the axial direction of the tapered interference fit was conducted, and it was compared with the FEM analysis of 3 modes of different load, namely, displacement load, pressure load, and offset load. Results shows that: the position of maximum...

In this paper, according to analyzing the domestic and foreign recent research status and future developments of open architecture CNC system, an open soft system with configurable architecture based on PC + programmable I/O interface card has been studied. The research is studied for the drawbacks of...

In this paper, Dynamic response and energy harvesting potential of single piezoelectric flag in the uniform flow is analyzed through 2D simulation method. A piezoelectric material named Polyvinylidene Fluoride (PVDF) is used to manufacture the piezoelectric flag. Special example is introduced to analyze...

This paper aims to analysis the ball screw pair in transient dynamics model based on the virtual acoustic prediction software. Its acoustic finite element model is established in the Lab to extract the transient dynamics analysis, which is concluded that the vibration response of the ball nut pair of...

Steer-by-wire is the latest technology in vehicle steering system. This paper reviews the domestic and foreign development of steer-by-wire steering system. The structure ,characteristics and working principle of the steer-by- wire steering system were analyzed in detail. At last, the solutions that...

Carbide tools were used to investigate the cutting temperature when heavy milling 6N01-T5 aluminum thin-walled hollow W-shape structures. The results showed that the value of cutting temperature at the area of weld seam or the intersectant ribbed slab was 40-60% times higher than that of cutting the...

To improve the anti-rollover capability of vehicles under limit conditions, the rollover stability of vehicles in high speed steering was studied; a vehicle dynamics model was built with the software of Carsim. Based on the variable threshold method of yaw rate, an anti-rollover controller was designed,...

In order to determining technological parameters of vibratory aging treating for large-sized welding box-section beam structures, kinetic analysis was carried out according to the industrial standard. The natural frequency, vibration mode and the curves of amplitude-frequency were obtained by using Finite...

DEFORM-3D is a finite element method (FEM) software that can perfectly simulate cutting process of materials. In order to research the cutting process of titanium, using DEFORM-3D software as a platform, through FEM on modeling and simulation to the cutting of TC4, the influence rule of cutting depth...

Firstly, based on the theories and methods of acoustic intensity measurement, the surface radiation noise of the rear driving axle of minibus was tested in the bench experiment. With the analysis of the experiment data, sound power was calculated to plot the noise distribution of the rear driving axle....

Based on the structure mechanics analysis and fatigue mechanism study for the pin of the folded arm lorry crane, a new fatigue test equipment for the pin of the folded arm lorry crane is developed. The pins are quenched in different hardened layer depth ratio, and then 48 pins are chosen for the fatigue...

The multi-holes orifice plate are simple hydrodynamic devices which can be used for intensification of liquid-liquid heterogeneous micro-mixture for preparing bio-diesel or emulsified diesel. In this study,a flow visualization experiment system with a transparent hydrodynamic cavitation reactor was setup...

This article from the small medical products research status quo of humanized design for the starting point of design, We analysis the relevant factors of humanized design, including the user characteristic model, user behavior model, interface model and environmental characteristic model and than analyze...

Column - crossbar rail is the heart of the Moving beams CNC gantry machine which is now widely used in Machinery manufacturing. Whether the structure is rational directly affects the dynamic performance of the whole machine and machining accuracy. The traditional slide, linear rolling and hydrostatic...

Dilatometry is one of the most popular methods for the study of high temperature physical properties of steel and thermal expansion is considered to be an important factor concerning on the crack formation during casting and rolling for pipeline steel. In the present study, dilatometric curve of X60...

The cable wind-induced vibration of long span cable-stayed bridge is one of the key factors causing serious damage to the bridge. The ribs setting on the surface of the stay cable are one of the aerodynamic damping measures to restrain its wind-induced vibration. As the surface morphology of the stay...

Due to the effect of the marine environment, the marine pipelines would drift away because of the water buoyancy when the pipeline laying and operation, as well as suffer the damage from the other external factors. Therefore, we need to coat a concrete layer on the anticorrosive pipe’s surface with a...

In this work a wall-modeled LES is developed to solve the basic flow character over rough wall on high Reynolds number without resolving the details of the roughness elements. The averaged roughness shear stress can be combined with the smooth wall shear stress in the inner layer wall-model. The instantaneous...

The performance of finger seal as an important component has decisive influence on performance of aeroengine. The complicated operating state of aeroengine, such as assembly condition, also has important influence on finger seal performance. However, equivalent dynamic model has not considered this factor,...

To verify the fatigue life of a hybrid bus frame, the finite element model of the frame is built, and the equivalent stress distribution of the frame was got. Multi-body dynamics vehicle model was built in ADAMS/Car. The simulation analysis was conducted based on the road spectrum compiled by MATLAB...

In order to enlarge the application scope of the existing criteria for the heat transfer deterioration, the criteria of heat transfer deterioration was assessed by using the method of mechanism analysis and experimental data available in the literature. The obtained results indicated that the criteria...

Based upon existing instruments have some disadvantages in both ways, one hand is simple structure, single function ,not work, difficult to cut, cannot cut completely or unsafe issues;on the other hand is complex structure, equipped with gear-down mechanism ,high manufacturing cost, bad price/ performance...

To solve the problem of adjacent order overlap for variable speed bearings, a novel method with the fixed-point independent component analysis (ICA) and peak detection is proposed. Firstly, the mixed vibration signal is whitened by through of the singular value decomposition. Then it introduces fixed-point...

In view of the phenomenon that defects such as fracture, wrinkling and springback may generate when box shaped parts are stamped, however better surface quality on parts have been required. The process of drawing, cutting and springback for magnet covers with arc top and straight sidewall are simulated...

This paper designs a new type of wind-wave complementary device, and introduces the detailed design about a few key part of the device. The principle of the device adopts the wind-wave complementary system ,which collect the wave energy and wind energy respectively. Moreover, to increase the generating...

Considering that there are plenty of risk factors affecting hydraulic gear pumps wear life, multiple-factors assessment approach based on FAHP is proposed. Fuzzy consistent matrix is constructed by applying fuzzy theory into conventional AHP to improve the precision of judgments of decision-makers. The...

With the rapid development of aircraft industry, manufacturing department needs to put forward higher requirements for the accuracy of aircraft assembly. It not only affects the overall quality of the aircraft but it also affects the cost of aircraft manufacturing. This paper introduces the ways about...

The dislocation multiplication behavior of AZ61 magnesium alloy during cyclic bending vibration was investigated. The results show that with the increase of stain amplitude and shear stress, the process of dislocation multiplication behavior contains dislocation slipping, dislocation multiplication and...

This paper discusses a control system for intelligent tracking. It takes STC89C52 as control core, the infrared tube ST118 for road information acquisition sensor, and will collect back the information analysis and processing, output the corresponding duty cycle of the PWM wave as a motor drive signal,...

The effect of drying temperature on qualities of dehydrated thyme was evaluated. The moisture content and water activity of the thyme decreased with the drying time and drying temperature. The chlorophyll content was enhanced when the drying temperature was decreased. Hence, a lower drying temperature...

The effect of drying temperature on sensory and flavor of thyme was evaluated. The drying temperature showed no influence on the flavor the dehydrated thyme. A higher drying temperature leaded to a dark greenness of the thyme. Hence, a higher drying temperature leaded to an attractive appearance of the...

Vibration and noise always occur simultaneously. Vibration is the source of noise. All noises are the transmission of the vibration energy of vibrating body on medium, whether solid or fluid. The noises may through many mediums to our ears and the noises may be very complicated, which are comprised by...

In this paper, the influence of nozzle hole shape on internal flow and near-nozzle spray behavior was studied. A flow visualization experimental system with a transparent scaled-up injector was setup. Three nozzles with the same hole outlet diameter but different hole shapes were used. Detailed comparisons...

Biped walking robot is designed based on the principle of bionicswhich can walk like a human.The biped robot can replace the prosthesis for the disabled, and it can also make the robot better to complete the dangerous or high-intensity work. This robot not only has characteristics of simple structure,...