Applied Mechanics and Materials Vols. 313-314

Abstract: The paper put forward to research the mathematical model of double wishbone independent suspension. First,the nonlinear elastic performance of oil gas spring was deduced through real gas state equation. After that, Kinematics principle of double wishbone independent suspension was researched, it was help for understanding how to design the guide mechanism of suspension. In the end,the external influence factors on suspension were analyzed, the conclusion could be used as a reference for design of the device.

Abstract: Actual model of cubic hinge sleeve was established in Ansys. Strength of cubic hinge sleeve was calculated under high pressure load in realistic condition, which is based on practical processing, results of values of von Mises stress were obtained. It provides a theoretical basis for optimization and reliability design of cubic hinge sleeve.

Abstract: Optimized design of litz-wire inductor and optimal choose of working frequency is required to improve the efficiency of induction cooker. A new formula to calculate the dynamic inductance is deduced from the basic definition of the inductance, considering the case that the pot may be lifted with the inductor in working state. A method to calculate the loss of the inductor and to achieve the optimized the diameter of the litz wire by numerical calculation is presented. Take advantage of the calculation results, the resonant frequency for the induction heating system can be determined. An experimental prototype was built to verify the calculation method.

Abstract: Based on the heat and mass transfer theory and characteristics of the FLUENT software, a numerical simulation platform had been developed to study the heat exchange and flow situation of gas-liquid two-phase flow in vertical helically coiled pipe. The frictional resistance of gas-liquid two-phase flow in the pipe was investigated by this platform. The results show that frictional pressure drop is relatively small under high pressure condition and increases with the increasing gas quality. This platform could provide a good support for the design and research of vertical helically coiled pipe.

Abstract: In this paper, a simulation of three kinds of micro-groove plate heat pipes--- rectangular; trapezoidal and triangular, is conducted by thermal analysis software ANSYS. Through comparing with the focal point temperature value of the surfaces of micro-groove plate heat pipes, respectively being 30W; 40W; 50W, the result is obtained that trapezoidal plate heat piper has more excellent performance.

Abstract: According to uncertainty of the design parameters for large span truss of installing wave-maker, in order to avoid the waste of materials,the truss is analyzed based on the finite element analysis software ANSYS to find out its weaknesses and various parts of the deformation. On the premise of ensuring the intensity and stiffness, the weight of the truss is reduced by adjusting its sizes and selecting different profiles, so as to achieve the optimization of the truss of installing wave-maker.

Abstract: On the basis of the mathematical model of asynchronous motor combined with two-axis theory of revolving frame transformation simulating model was established under the environment of MATLAB/Simulink. At the same time, by using this simulation model, the analysis of the starting procedure of asynchronous motor was presented to demonstrate its correctness and such merits as quick response, flexibility, convenience, intuition and so on.

Abstract: Coefficients of dynamic viscosity for AL7050-T7451 at room temperature is extracted by creep and stress relaxation simulations in Ansys. An analogy has been established for both creep and stress relaxation, with simple Maxwell Model. The stress relaxation curve thus obtained is then used to generate the Prony series coefficients which are then used to run some dynamic analysis in Ansys to see the effect of loading at different frequencies on the value of η (i.e dynamic viscosity). This will be verified with the simple analytical dynamic formulation based on the Maxwell Model. A good agreement has been found for both quasi-static and dynamic tests with Maxwell model.

Abstract: The nonlinear programming method is used to study the finite-thrust minimum-time orbital interception problem. Considering the spacecraft with fixed impulse, the Modified Equinoctial Elements are used to describe the movement of the spacecraft in the attached coordinate, and the model of the orbital interception problem is established. Then the trajectory optimization problem is solved by the nonlinear programming method. The simulations demonstrate that the minimum time orbital interception mission is well accomplished, and the spacecraft fly around the earth with maximum thrust magnitude at whole time history.

Abstract: In this paper, the dynamic characteristics of lunge material mechanism in household sewing machine are simulated with the MATLAB software and the dynamics simulation software ADAMS. The displacement, velocity, acceleration of lunge needle is calculated with MATLAB and simulated with ADAMS. Then the curves of displacement, velocity, acceleration of lunge needle VS time are plotted with the two different softwares respectively. The angular acceleration and drive torque of crank is calculated and simulated either. Then, the contrast and discussion about the calculation and simulation is carried on. This research has some reference value for design and simulation of lunge material mechanism in sewing machine and other machines.