Materials Literature
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The introduction of self-healing functionality into epoxy matrix is an important and challenging topic. Various micro/nano containers loaded self-healing agents are developed and incorporated into epoxy matrix to impart self-healing ability. The current report reviews the major findings in the area of self-healing epo…
A method for optimizing support vector machine（ SVM） parameters was proposed based on isometric feature mapping（ Isomap） and improved genetic algorithm（ IGA）,to solve the problem that parameters are difficult to choose in the process of gearbox fault diagnosis and recognition. Firstly Isomap was used for high-dimensio…
Through the analysis of working condition of three-dimensional adjusting frame,I perform theoretical calculations and choose the main components of three-dimensional adjusting frame. And I make a overall design of the mechanical structure of three-dimensional adjusting frame from top to down by using the software of U…
Regarding the new type of centrifugal spinning electric spindle as the research object,the method of rigid-flexible coupling was used to build the dynamic model of electric spindle; On the basis of modern computer simulation technology,the system vibration characteristic analysis was finished by using the combining si…
In order to reduce the temperature effects on compliant mechanisms,the comparative analysis of temperature effects on four kinds of typical flexure hinge with straight-beam,circular,elliptic and parabolic section is carried out,so that we can choose reasonablely the flexure hinge used to design compliant mechanisms. T…
Dynamic performance of gear system especially vibration was a typical nonlinear problem,while the vibration was closely related to the gear profile modification,the solving gear profile modification parameters was a nonlinear optimization problem. With a pair of spur gear as research object,armed with the kisssoftsoft…
As the main bearing part of the vehicle,most of the load was undertaken by the frame,so its performance directly influence the performance of vehicle. According to the special requirements for equipment of semi-trailers,a calculation model of the frame was established with the finite element method,which static charac…
Coal is the important basic energy in China,however due to the problems of conveyor belt running deviation and avultion caused by freezing adhesive turnabout roller surface,it seriously restricts with coal mine safe and efficient production in cold regions during winter and brings huge economic losses to the company,a…
According to theory of nonlinear vibration and Higher theory of plates and shells,the welding residual stress influence on stability of solution of nonlinear thin rectangular plate was studied to choose nonlinear rectangular thin plate possessed the welding residual stress as subject investigated. The conclusion which…
Aimed at fracture of transmission shaft about some kind of transport for bulk dry-mixed mortar,this paper designed a set of testing equipment which can test torque,run out,revolving speed. This testing equipment provides with analyzed data on fault diagnosis and maintenance of this kind of brand new car. This set of t…
Based on uniaxial fatigue research,starting from the fatigue mechanism,a strain energy density and strength interference model based on the strain cyclic loading has been studied. The energy dissipation is equivalent to the stress growth.The relation of internal stress applied stress and the intrinsic strength has bee…
Some external pressurized thin walled cylindrical shells could only be stiffened by small stiffening rings due to structural limitations. Such stiffening rings can only partially stiffen the cylinder which is less effective than big stiffening rings.Eigenvalue buckling analysis was done for a series of external pressu…
From the perspective of engineering practice,analysis of stiffened composite wall slab with a Delaminatong at the stringer interface in this paper,and typical structure / typical Delaminatong type is simulated using finite element method. In view of reasons of Delaminatong,feasible proposals of damage control and repa…
Traditional train load spectrum statistics are all based on actual measurements,using Weibull distribution to fit test results and calculate load at different levels. But the required testing mileage is long and the entire process is timeconsuming. It is also difficult to fit Weibull parameters. More importantly,the f…
The down-ground oscillatory focus has dynamic effects on the ground,it is important to study these responses for earthquake disaster reduction,shockproof,inversion of the oscillatory focus and so on. In this paper,the dynamic response problem of the out-of-plane harmonic circular oscillatory focus in the half-space wa…
Ladder type disc acoustic radiator is widely used in high power ultrasonic field. The frequency equation of stepped thickness disk in free boundary condition are derived based on Mindlin theory from the acoustic point of application and The frequency equation was numerically solved,At the same time,the effects of geom…
Based on the rigid-flexible coupling multi-body system dynamics theory,built the rigid-flexible coupling model of shearer’s cutting part,researched the annular gear dynamic behavior during the process of meshing. According to the resistance of coal mining machine drum in the complex coal seam condition,generated the t…
Nonlinear finite element method（ FEM） was adopted to calculate the compressive stability of stiffened panel numerically. Simple support and clamped support of loaded ends as well as common used unloaded edge support fixtures,such as blade,bolt and rigid strip,for stability experiment were simulated by defining node co…
Cutting chatter is one of the major problems which constraints the high-performance and high-precision of the machining products. A damping lathe tool based on intelligent material — magnetorheological fluid was developed in order to effectively suppress cutting chatter by using excellent mechanical-electrical couplin…
The key of the degenerate state recognition of roller bearing is feature extraction and pattern recognition. Local characteristic-scale decomposition（ LCD） is a new time-frequency analysis method,which is very suitably applied to the feature extraction of roller bearing vibration signal. Since variable predictive mode…