Applied Mechanics and Materials Vols. 644-650

Abstract: The determination of sediment concentration of near bed, because of high sediment concentration and disruption of measuring device, is a difficult point in field survey. A water body sampler is developed to get samples of sand-containing water body close to the bed. Then, the basic features like sediment concentration at different level and sediment diameter can be determined. Combined with flow rate measurement, the near-bed sediment runoff rate can also be estimated.

Abstract: Frame has important effects on the performance of the whole of heavy semi-trailer. A heavy semi-trailer frame is analyzed and researched on in the finite-element way in this article. The frame of 3D geometric model is established by using Pro/E. And it was imported into the Hypermesh to establish frame finite element model. Frame are calculated by using ANSYS solver in bending condition, emergency braking conditions and rapid turn conditions of stress and deformation conditions. The computational tools and methods we used provide the new type of frame and development with a reference method to refer to in this paper.

Abstract: The temperature field of cylinder liner directly affects the working process of the engine cylinder. Its research is an important research direction of the engine research. We analysis the location relationship between the cylinder liner and cooperate with the components analysis in this paper. Then the finite element model of cylinder liner component is established and boundary conditions such as gas convective heat transfer coefficient, the piston top heat transfer coefficient are analyzed. A certain type of engine cylinder liner is calculated by using ANSYS temperature field equation solvers. The model and the calculation method this article uses are of great significance for the temperature field research of other heat transfer components.

Abstract: The traditional design method of heavy truck leaf spring is always the trial-and-error method. In addressing the problem of being multi-objective, the weakness is that there is a large amount of calculation and it is difficult to find the most optimal solution. The leaf spring of the sinotruck ZZ4256N324MD1B is taken as the research object. With the constraint conditions of the spring's overall layout, stiffness, strength, material, size, and the requirements of the manufacturing process, the optimization design model is established. We follow the method of particle swarm optimization algorithm to get the more optimization design on the leaf spring. The calculation of design example shows that the method this article uses of optimization to solve practical engineering problems with complicated constraints is very effective.

Abstract: Computational Fluid Dynamics (CFD) is used for the investigation of the piston wind. The Navier-Stokes (N-S) equations and standard turbulence model were applied to set up the model. The train transient aerodynamic characteristic has been research during the crossing process. The simulation results are trustworthy and numerical simulation of piston wind is feasible using dynamic grid in CFD software, which provides the basis for the virtual design of piston wind. It is significant importance for further studying the structure of train, shorten its development and guiding significance for practical application.

Abstract: In this paper, I introduced the working principle and drive type of hybrid cars, and parallel hybrid system was the driver type of hybrid sanitation vehicle. Combined with vehicle parameters and power performance indicators of the original model, I matched the appropriate engine, electric motor, battery and design the corresponding transmission.

Abstract: This paper presents a coordinating steering control method in an Electric Vehicle with Four-in-Wheel-Motors Drive and Four-Wheel Independent Steering. This control method applied a PID compensation to solve the absonant steering problem. This research builds a mathematic model for the control system and uses the Matlab simulation to verify the feasibility and control effect. Then it is applied in a real car environment for further experiment in which the paper studies the control effect with varied control parameters. According to the analysis of the experiment, a practical solution for steering System is proposed with excellent control effect.

Abstract: In order to adapt to the needs of internal combustion engine speed variation of the turbocharger. Using waste gas regulator control exhaust gas inlet device. The effect of exhaust gas regulator is for adjusting the gas flow velocity and direction. When the internal combustion engine running at low speed raising the impeller speed. Exhaust gas regulator and axial moving blades rotating blades of two kinds of structure. The axial moving blade structure is changing the way nozzle ring opening work. Rotating blade structure is working on changing the way of blade Angle. Exhaust gas to adjust the turbocharger is a control of internal combustion engine air pressurization value of the speed changes.

Abstract: As the installed base of all other assemblies, the corn combine harvester chassis supports a variety of loads from the harvester and ground, so its reliability directly affects the quality and safety of the corn combine harvester. The analysis of corn combine harvester chassis was carried out with finite element analysis software. First, the 3D part of the chassis was established and simplified in accordance with the relevant principles. Second, the stress distribution and displacement of the chassis in the no-loaded and full-loaded conditions were calculated by meshing,applying loads and constraining boundary conditions. The analysis result is of great significance to enhance the quality and reliability of the chassis.

Abstract: The article researched on pump truck working device control system and it used the pull sensor cylinder position and used the proportional flow valve to control the flow. The results show that not only it realized all the functions of the current hydraulic control proportional valve, but also it has the advantages of low processing difficulty, fast dynamic response and parameters changing with control requirements. Refit the boom frame of hydraulic and electric control system, to 46 m pump truck boom control system simulation. The results show that it improved the control precision and arm trajectory accuracy of pump truck boom cylinder and improved the quality of the whole machine work by using high precision proportional directional valve and the cylinder position sensor.