Applied Mechanics and Materials Vols. 602-605

Abstract: With the development of information technology, computer intelligence technology has been applied in all areas of life include sports biomechanics measurement field. The application of computer intelligent simulation in sports biomechanics measurement became a hot research topic in the field. The article first analyzes the principle and characteristics of cluster analysis. Based on this, it designs a simulation environment of athletics and constructs the analysis model of motion data using clustering analysis algorithm. In order to verify the practicality of the method, this paper establishes mechanical simulation model using SimMechanics. Through the analysis, we can see that the method can significantly reflect body change functions after track and the effect is significant. This method has strong practicability.

Abstract: Tire hydroplaning has become a direct inducement of wet-weather road accidents. The model of hydroplaning of the deformed rib tire with load was built with the help of CFD (Computational Fluid Dynamics) technology. The three-dimensional SST coupled with the Volume of Fluid (VOF) model was applied to numerically simulate the air-water two phase flow with free surface in tire hydroplaning. Based on the model of hydroplaning, the influence of water film and water velocity on tire hydroplaning were analyzed. Analysis shows that tire has a high pressure induced by water impact in the front of footprint; water flow is inclined to tire sidewall. The water velocity in different circumferential pattern is difference. There is an apparent impact of water film thickness and velocity on tire hydrodynamic pressure and the high pressure zone. Therefore, the results of this paper can give recommendations on drivers in the rainy weather.

Abstract: This article selects relatively common residential area as the prototype and uses finite element analysis software ANSYS/LS-DYNA to establish a framework to simplify the model. Four scene measured vibration velocity are loaded on the structural model. The dynamic response under four different peaks blasting vibration velocity response is simulated, and the simulation results are summarized.

Abstract: The stability and the instability form of tunnel surrounding rock have always been hotspot and difficulty problems in underground engineering. We combined the finite element method with the strength reduction method to study the stability of the surrounding rock in tunnel with large cross section. To study the vault settlement, ground settlement and some feature points’ displacement, we used ADINA software to establish a simulation model, from which we can get the relationship between the strength reduction factor and data such as the maximum principal stress and the maximum plastic strain. Also, with analyzing the stability of tunnel surrounding rock, we defined the safety coefficient as 2.5 at last. Then, the tunnel’s weak position during the excavation projects and corresponding strengthening measures can be found through analyzing tunnel stress condition.

Abstract: Based on the discrete element numerical simulation, the change of failure modes of slope influenced by parameters of rock mass structural plane is studied. It is shown the failure modes shift gradually from the bedding sliding failure modes to the sliding-bending failure modes with the increase of the strength of the rock mass structural plane; The slope failure modes are mainly sliding failure modes with the increasing of the normal and shear stiffness and spacing of rock structural plane. Failure modes shift from shearing slip failure modes to shearing slip and buckling failure modes and finally to the tilting failure modes with the increase of the rock structural plane dip angle. The impact of the rock structural plane cohesion to the slope stability is the greatest, and the stiffness is the least.

Abstract: Based on the finite element model of slope, the stability of sand slope are studied. The results show that The pore water pressure shows increase trend, while the excess pore water pressure shows decreasing trend with the increase of the water depth. With the increase of the the water depth, safety factor of slope calculated by quasi static reduces to 0.193 from 2.366, which reduces 12.26times. The minimum safety factor calculated by dynamic time history is less than that by quasi static method, which shows that there is some limitations of the quasi static method.Without considering the groundwater, the destruction of slope is mainly the circular shearing damage through the slope toe, while the destruction is not yet through the slope toe, but from a point on the front of slope.

Abstract: The dynamic characteristics of 80 m single-layer spherical lattice shell structure are analyzed to control its vibration under seismic load. Through the response spectrum curve of current design specification, the analyses for the vertical and horizontal seismic responses of the single-layer spherical lattice shell structure are made by CQC, and the displacement response of the nodes and internal force of the rods unit are calculated respectively. The calculation results show that the vertical and horizontal seismic responses of the long-span lattice shell structure are in great difference, and should be performed in vibration control at the same time, which could provide certain references for the seismic design and vibration control of single-layer spherical lattice shell structure.

Abstract: This project mainly studies the structure composition and the working principle of the seat vibration system of the roller . On this basis, dynamic equations are obtained according to the stress analysis of the simplified system of the seat vibration system of the roller, and then with the simulink module of MATLAB software, a simulation model is established as to the driver's seat system.Through the model simulation, the roller’s vibration of the the driver seat system is analysed,then based on the analysis, the optimization design can be done. Finally, through the research of this topic, the ride comfort of roller is been improved.

Abstract: To solve the thermal load problem of 1015 engine cylinder liner, based on the temperature field measured, the boundary condition of 1015 engine cylinder liner was determined, a comparatively perfect mathematic mode and a geometric model are built up, and the analysis of the three dimension temperature field of cylinder liner and the thermal deformation was performed using FEA method.

Abstract: In Pro/E environment, it gived the details about parameteric designs on cam contour curve. By 3D parameterized modeling, motion simulation and analysis of cam, the process planning and tool travel-paths generating were given. G-Codes program was automatically generated too. At last, the integrated design on CAM/CAPP/CNC for cam components is realized.