The optimization design of gear transmission based on MATLAB is studied for the purpose of finding a convenient and practical method. A mathematical model of optimization design is established in order to minimize the volume of gear transmission, the sequential quadratic programming method (SQP) is used to solve the nonlinear constrained optimization problems. The method how to solve gear parameter optimization base on optimization toolbox of MATLAB is introduced in detail. An optimization design example is given, the optimization result accords with the standard specifications of mechanical design and can be directly used. The result shows that this method is convenient and effective, and can simplify computer programming, is especially suitable for engineer.
A numerical investigation is presented of the structure of a displacement ventilation convection by using the Reynolds averaged Navier-Stokes equation and K-ε turbulence model. Numerical results are reported for the effect of Gr/Re2 on structure of indoor air convection and ventilation efficiency. The results show that the structure of indoor air convection changes from mechanical ventilation to natural ventilation, and the curves of ventilation efficiency are like “M” with Gr/Re2 increasing.
The inertia vibrating screen mechanism is taken as an example for the purpose of finding out the kinetic characteristic conveniently, the solution of mechanism kinetic simulation based on SimMechanics is studied, the simulation physical model is given, and the simulation is carried out after the setting of all simulation parameters. Compared with the others simulation solutions, its most prominent feature of SimMechanics is that it needn’t establish the mechanism kinematical mathematical model and program, it has the advantage of convenient and the visual modeling function, also has the powerful simulation function. it is a powerful and convenient tool in mechanical system’s analysis and simulation.
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