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AMESim is one kind of software for modeling, simulation and dynamic analysis of hydraulic and mechanical system. Sometimes there is drilling rod offset in vertical drilling operations. We set simulation model, determine the values of the parameters, and make simulation analysis of a self-tuning hydraulic control system on vertical drilling direction using AMESim. And we get ideal simulation curves...
On the basis of postponed-set mortar (PSM) coating experiments, the visualized velocity and shear rate flow fields in screw channel were simulated and analyzed. The commercial finite element software POLYFLOW was employed to simulate the flow and deformation for PSM with Bingham liquid in screw channel at different screw revolutions and different screw geometry parameter. The simulative results verify...
Aiming at data sharing between Geomagic and SolidWorks, the article gives some methods dealing with data in point phase, polygon phase and shape phase. Meanwhile, the article takes an example which shows its input methods and efforts in different way from Geomagic to SolidWorks.
To avoid misalignment in continuous annealing oven, it is essential to minimize the asymmetric flatness deviation of a cold-rolled strip. Firstly an index was defined to evaluate the asymmetric extent of strip flatness, and it is considered as a goal of the control system. Secondly the existed algorithm to adjust backup-roll tilting was optimized, based on weighted least-square method. By simulation...
it's presented an overview of vehicle-mounted devices, voice coding technology application status, AMBE algorithm and its related series chip works. It's introduced a brief analysis of algorithms, combined with algorithms features and system requirements of AMBE algorithm and it's discussed the feasibility of the application of AMBE in the Intelligent Transportation speech technology which is proved...
The sightseeing car use the wind and solar energy as main power in order to driven vehicle movement, Rotation of clinopodium can drive vehicles as a movement directly by its unique structural design, and useing the electromagnetic clutch control to achieve energy conversion and synthesis. After finite element analysis wind wheel Leafs of generating rotating torque and the assembly flow plate, that...
In order to simulate the high pressure environment in deep-sea, a set of tester which can simulate the deep-sea environment was designed. Based on the analysis of its control system, this paper proposed a closed-loop control strategy of pressure. Hardware circuit of the constant frequency variable speed control system was designed. Its main control circuit used Atema8L, a single-chip microcomputer,...
Swimming bed combined with aerobic granular sludge as a novel technology for domestic sewage treatment was developed in this study, which was on the basis of the biofilm process and activated sludge process. The on-way variation of COD and NH4+-N was studied at different hydraulic retention time (HRT). The results show that the concentrations of COD and NH4+-N go down during the treatment flow, and...
Splitting fatigue tests of AC-25 asphalt samples were carried out in stress control mode, and samples are suffering from one freeze-thaw cycle and without frozen-thaw. The stress fatigue equations are obtained with the result of the tests, and the strain fatigue equations are acquired on the base of above. The maximum tensile strains at the undersurface layer of the typical asphalt pavement are obtained...
High accuracy digitization and digital sensor parameters configuration are more complex. According to the principles of digitization, sensor signal high accuracy digitization technologies are discussed and applied to high accuracy digital load cell design. Orthogonal experiments method is adopted to optimize parameters configuration, and ENOB (effective number of bits) of measuring results is proposed...
In this paper, a numerical two-phase flow model combining with the Realizable k-ε turbulent model for compressible viscous fluid is presented for the simulation the flow around a fixed-cone valve; and the equations are solved with the finite volume method. The free fluid surface is simulated by the VOF method. The function of the fixed-cone valve for energy dissipating is pointed out by analyzing...
The section shape of piles becomes various along with the development of piles. The additional stress in the ground due to skin friction and tip resistance of pile is different in different section shape. Using the numerical integral function of NIntegrate in Mathematica software, basing on Mindlin stress solution and referencing the idea from Geddes stress solution; The calculation method on additional...
Dynamic ice slurry, one of the most efficient ice-storage methods, has potential in solving peak-valley electricity demand and building energy saving fields. This paper introduced the common binary ice-making methods and their current situation as well as the research hot topics. Evaporative supercooled water method for dynamic ice slurry producing is analyzed in detail as a new method. At last the...
Generally the tunnel construction in downtown area is restricted by high-density buildings, narrow site space, complicated geotechnical condition, dense underground networks and busy traffic. The double or multiple tunnels are frequently used in processing subway engineering in cities. Sometimes underground space construction must be done close to the existing tunnels with complicated mechanics behavior...
The effective method of a simulation system of manipulator with UG based on the simulation of 3D motion for 5-DOF manipulator is presented. The construction of kinetic model and the simulation process is analyzed emphatically. To the usual 3D simulation system of manipulator,the instance is universal reference.
The sodium sulfate in the surrounding environment of cemented soil may affect its mechanical property, which may cause some serious damage to structures. In order to study the erosion effect mechanism, a series of tests were conducted on the cemented soil blocks which were cured in the sodium sulfate solutions with various concentrations and ages. The testing results show that the sodium sulfate solution...
In order to recognize engine radiated noise in reverberant sound environments, a new method based on Statistical Energy Analysis was proposed to adopt. The noise identification model of compartment engine had been established, and then engine radiated noise levels, characters and contribution had been calculated and analyzed. The results showed that the cylinder body and oil tank are the main noise...
Usually the study of environmental vibration subjected to impact load is limited to strong impact load such as blasting, while lack of concerns of other styles of impact loads. A field impact test on ground surface was carried our by a heavy hammer, in which the accelerations of ground vibration were achieved. The time history curves of the accelerations are typical pulse property. Through Fourier...
An improved torque control method-torque/time control method is proposed. The correlation between torque and Pre-tightening force is theoretically analyzed in the bolt joint assembly procedure, from which the equation of the torque and pre-tightening force is acquired in a system of stiffness invariable. When take the slope of torque-time changing and system stiffness of joint parts into consideration,...
Concrete fails in a localized pattern. In this paper, a uniaxial stress-strain relation incorporating hardening and stiffness degradation is developed for plastic-damage constitutive models for concrete, which reduces mesh sensitivity in the localized strain softening process, while a reasonable stress-strain curve is maintained for the uniform strain hardening process. The proposed formulation can...
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