Applied Mechanics and Materials Vols. 536-537

Abstract: The traditional way of the matching between suspension parameters and vehicle performance is that we assess the matching of suspension design parameters through the driver's subjective experience, this will lead that the vehicle development cycle is long and high cost, meanwhile the matching during the parameters of suspension is blindness. With the development of computer technology, combining the modern design theory and virtual prototyping technology, based on multi-body system dynamics method, the virtual prototyping model of mini passenger car was built. By using understeering degree, roll rate and total RMS acceleration values as evaluation indexes, the orthogonal experiment was designed and the range analysis was carried out, and the effects of the suspension structure parameters on handling stability and riding such as suspension rate of front suspension and rear suspension, torsion stiffness of antiroll bar, damping ratio of front suspension and rear suspension and so on were studied. Then the remarkable factors are found, the final results supply guidance and support for the optimization of the suspension parameters.

Abstract: This paper presents a new catching-mechanism which is the key device of the casing continuous circulation system designed by us. The difference between different structures would have important effect on its stability and strength. In this paper, through limiting the spacing of installation and the strength of the catching-mechanism, we analyzed the effect of inclination of the horizontal hydraulic cylinder based on the finite element method. And the optimum design of the catching-mechanism which shall satisfy all of the constraints were achieved with the help of MATLAB, ANSYS and ADAMS.

Abstract: Blade is one of the important components in aero-engine, turbine, and wind generators. The quality of the blades has big influence on the performance of the machine. So high profile accuracy and low surface roughness were put forward. Ruled blade is just one of the blades of aero-engine, which has simple profile and little distort. This blade was grinded by two sides together in the paper. Therefore, in this thesis, the main objects are as fallow: firstly, according to the characteristics of the abrasive belt grinding, analysis the selection of grinding distance for the blade. Secondly, established the model of contact wheel compare grinding system, derived the range of wrap angle of contact wheel, and then two region were make out, one is the region can be directly grinding, and another region which may lead to wheel interference. At last the grinding path of the center of the contact wheel was obtained by calculated the blade model.

Abstract: This paper is based on ANSYS finite element analysis software for the platform. It gets the hoister spindle device overall assembly analysis by the finite element theory and method, and gets the overall stress and strain of convective cloud. It is the foundation for further overall structure optimization design and assembly analysis research. It gets topological optimization analysis for the board of the picture of drum, and gives humanoid pore model board important reference value. It provides effective theoretical basis for mine hoist spindle devices the whole optimization design.

Abstract: Application of sports biomechanics, sports biomechanics analyses of technical action shots, biomechanical characteristics obtained the basketball shooting skill and summarize the influencing factors of sports biomechanics shooting rate, especially for the shot before the body, lower limbs of each part of the action process were studied.

Abstract: The Cable or Pipe between the Two Relatively Rotating Platforms Exists the Twisted Problem. from Viewpoint of Braid Group Theory, Rope’s Twisted State is Researched on. Based on the Characteristics of a Special Garside Braids Δ_n and Δ_n^k , the Equivalence of Two Rotation Modes is Revealed. also, that the Determination of Rotation Mode’s Minimum Rotate Range is 4∏ while Using Braid Theory is Proposed. the Theory of Braid Group can Not only be Used as a Criterion for Determine Whether the Cable is Twisted, Finally, but also can be Used as Avoid Cable Twisted during Mechanism Design.

Abstract: For the problem of low efficiency of the ordinary hydraulic systems of the friction welding machine, operating characteristics and efficiency model of the force application hydraulic system of friction welding machine are studied. The energy consumption characteristics of traditional welding machine are simulated, the efficiency characteristics of the force application hydraulic system of friction welding machine is studied, and the energy consumption and efficiency model are deduced. According to theoretical analysis, the system efficiency can be improved by changing pump output flow and relief output flow. The simulation results show that the working efficiency of the new system can be enhanced to 24%. The new friction welding hydraulic system was used in actual production and the system efficiency can be improved to 22%.

Abstract: According to experimental data, the model of fixed Joints stiffness in machine tools was built by least square of relative error. The new regression equations were obtained by regression analysis. Compared to the original equations with Gaussian least-square, the relative error of new regression equations is within 3.5%, which reduces by 12.5% and the mean absolute percentage error (MAPE) decreases by 18.0%, 12.4%and 19.0% respectively.

Abstract: This paper aims to bring an organized overview of the damper malfunction due to the cavitation and aeration phenomena, which are normal problems for all kinds of hydraulic dampers. The object of this report is to describe, detect and simulate these damper failures.

Abstract: Variable cylinders internal combustion engine works with variable number of cylinders. For gasoline engines, the fuel consumption rate rises rapidly with the decline of shaft power when operating at low load. If we reduce the number of cylinders but keep a constant power, each cylinder has more load and then works with low fuel consumption. At the same time, the spare cylinder can be used as an air compressor to recycle the energy lost in deceleration, braking or idle state. Pressed air is the carrier of recycled energy. Experiments show the fuel saving function similar to small-engine cars and energy recovery similar to expensive hybrid cars.