Materials Literature
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Deep learning can make the computing model that contains a number of processing layers to learn the data that contains many levels of abstract representation.This kind of learning way in the most advanced speech recognition,visual object recognition,object detection and many other areas,such as biology,genetics and me…
In this paper,the influence of the spiral angle of shearer drum on the cutting performance is studied in this paper.The calculating formula of the drum helical blade coal throwing force and loading quantity theory.According to the theoretical analysis,it is known that the axial force of the blade is inversely proporti…
According to the characteristics of structure of the crane box girder and its complex stress condition,an equivalent crack approach based on fatigue test data is presented to estimate the fatigue life. The fatigue test data can be well in reflecting the effect of stress concentration on fatigue risk points. The stress…
The author prepared specimen of glass fiber-hollow glass microsphere/epoxy syntactic foam material. We have obtained the load-displacement curves by three point bending test,studied the influence of glass fiber content on the bending strength and bending elastic modulus. Through soaking test,we measured the curves of…
To adjust the oscillation of renewable energy sources in the discontinuous generation of electricity,power plants will be used to stabilize the fluctuations. Power plants will start and stop frequently in the fluctuations,which exacerbated the fatigue creep damage of turbine rotor material,thus shorted the life of the…
In this paper,simulation and experimental studies of typical wear fault of the reciprocating machinery connecting rod big end bearing,explore the influence of the wear and tear on the lubrication parameters of the connecting rod big end bearing. Based on the Reynolds equation,by simulating different bearing wear situa…
Since the fouling accumulation in the heat exchanger equipment has produced great effect for safe and economical operation,it is particularly important to detect the fouling produced in heat exchanger equipment accurately and rapidly. Ansys finite element simulation software was used to establish the model of hollow a…
Aiming at the wear problem of the new-type metal belt type continuously variable transmission steel rope ring,the discontinuous contact geometry model and the finite element analysis model of the steel rope ring and the metal block in the WR-CVT transmission process are established,and the metal block and the steel ro…
The depth of the pipeline depression has different influence on the safety of X60 pipeline steel,combining Oyane ductile fracture criterion with numerical simulation method to study damage degree of the pipeline. Establishing three dimensional spherical concave defect pipeline model by finite element software and solv…
Spring energized metal C-ring is an important basic component which is crucial to ensure the safety of nuclear power plant operation. The thickness of alloy lining which is one of the component part of metal C-ring will affect the sealing performance of C-ring. This article has built C-ring three-dimensional elastic-p…
In order to solve the problem that a input shaft of the agitator 34-M-2001 in a polypropylene device produce cracks repeatedly in the same key groove after a certain period of time. Considering the installation space,economic,practical and other important factors. This paper proposed an improvement plan and demonstrat…
Gasoline hydrogenation is an important processing technology in petrochemical production. The majority of supporting platforms of production equipment in the form of steel structure,which the strength and stiffness are very important to the production safety. The finite element model is established by ANSYS Workbench…
In order to discuss the rationality of fatigue analysis models of bogie welded frame,this paper regards box girder as the research object and establishes nominal stress model,structure stress model and notch stress model by aiming at different processing methods of main weld. Through stress characteristics,fatigue ass…
According to the damage tolerance design requirements to the engine life-limited parts,research on the fatigue crack growth tests of an engine power turbine（ high-strength GH4169） is carried out in this article. The crack growth behaviors of the turbine and the dispersion are obtained. Meanwhile,the three-dimension cr…
As enormous number of tubes in large fixed tubesheet heat exchangers, it is difficult to model all the tubes and tubesheet connections in detail for FEA. Therefore, it fails to yield an accurate stress field around the connecting region of tubes and tubesheet, which is essential for the effective stress intensity eval…
A semi-analytical solution theory is presented by combining the separable Hamilton canonical equation and finite element method. The problem of free-edge effect of orthotropic laminates is studied in symplectic system. First, the separable Hamilton canonical equations are established with modified Hellinger-Reissner v…
In order to study the mechanical behavior and energy absorption characteristics of a metal circular tube with axial pre-compression under axial impact load. The finite element analysis was carried out based on Abaqus. A circular tube whoseR/t value is 15 was studied. At the same time,considering the influence of the i…
In view of defect of selecting parameters for automotive suspension system,optimizing method of determining the parameters based on local elitist strategy（ LES） and artificial bee colony algorithm（ ABC） was proposed through integrating great local seeking ability of LES and great global seeking ability of ABC algorith…
According to shearer vibration problems in the practical work,using multi-body dynamics theory,considering the connection characteristics between walking unit of shearer and scraper conveyor,the support characteristics of adjustment height oil vat,the stiffness of rocker arm of shearer,the connection characteristics b…
The manufacturing requirements and research status of plastic forming pipe fittings in the industrial field are analyzed. The working principle of single point incremental forming metal bellows is introduced. In order to obtain the influence of process parameters on the forming process and forming quality, the finite…