Three-dimensional Finite Element Dynamic Analysis On The Pulverizer Foundation

Along with our country's economy development and the science and technology unceasing progress, the pulverizer already extremely was widespread in our country application, so the question of the pulverizer foundation's vibration also generally existed. The cause of the machinery foundation vibration must be understood thoroughly for the more reasonable design power equipment foundation. The static computation is used in the original standard, now the paper attempts to analyse the pulverizer foundation in the power angle.The paper takes the question of the stick rub equipment foundation in the actual production movement ion the weihe clean energy limited company as a background. The pulverizer foundation vibration reason and mechanism is understood and analyzed completely through the scene vibration testing as well as large-scale analysis computation software ANSYS building model analysis and other measures, thus the basis is provided for better designing the grinding machine foundation and reducing the foundation the vibration.Firstly, the principle of the vibration compution about the machine foundation is discussed deeply in this paper. The pulverizer foundation two kinds of computations patterns including quantity-damping-spring pattern and the elasticity half space theory is introduced with emphasis and the foundation level swing coupled oscillation vibration principle is elaborated detailedly. Some significant conclusions are obtained according to the paper's actual project, which will provide the beneficial reference for the later power machinery foundation design and the reinforcement.Next, the pulverizer foundation each kind of time interval curve and the frequency spectrum graph are withdrawn through the scene to the pulverizer foundation vibration test, which including the test points' speed time interval curve and the displacement time interval curve, we can obtain the foundation's the biggest vibration displacement and vibration frequency and other the important data from these curves and the frequency spectrum graphs, which made us clearly to know the foundation vibration process and the vibration principle. Finally, the pulverizer foundation is build,analyzed and computed through large-scale analysis software ANSYS. The paper successfully carries on Winkler foundation beam model principle and the computer modelling and the value computation to unify; Analysis software ANSYS is used for the first time to build the model under the large-scale complex power equipment foundation and the consideration underground group pile coordination function, and simplified the quite complex power machine equipment foundation and the ground mutually affects in the actual project; Attempting for the first time to the pulverizer foundation in《code for design of dynamic machine foundation》the static computation to change to power numerical analysis in ANSYS, and has withdrawn the equipment foundation various steps modes and the transient state analysis displacement time interval curve, to know the large-scale power equipment foundation under mechanical load function power response process brighter. Each displacement time interval curve withdraws which from the computation show that the obtained half-wave oscillation amplitude maximum value and the actual examination value has the certain deviation, but all is in the identical magnitude, it shows that: if the vibration parameters can be simulated accurately, ANSYS can simulate the real situation. So the numerical value vibration analysis method and the result has the certain reference value.