The Vibratory Extracting-Driving Piling Machine Dynamic Analysis And Optimization Design About Increased Speed Railway And Reinforcing Roadbed

China has lifted the train speed for five times in recent years, and the development of high speed railway requires higher quality of the roadbed. This thesis, as a part of a research project sponsored by Beijing Railway Bureau titled "The design proposal of the technical equipment for strengthening the roadbed against hazards in speed-lift area", has completed the optimized design of a vibratory extracting-driving piling machine for roadbed strengthening. In this paper, the author sets up the dynamic model of the vibratory extracting-driving piling machine, and carries out the dynamic analysis, parameter calculation and Matlab's simulation for this model. Using the equation reciprocity law to carry out the calculation of soil parameter and simulation, and using the genetic algorithm to make optimization of the machine on the basis of the simulation, the author gets the optimum self-induced vibration frequencies of the machine changing with the depth of the pile and the optimization result of other parameters, thus reaching the conclusion that along with the increase of pile sinking depth, the optimum self-induced vibration frequency becomes bigger, and the vibration mass becomes smaller, hence deepening the knowledge of the dynamic performance of this system. The dynamic performance analysis, computer simulation and parameter optimization in this thesis for the vibratory extracting-driving piling machine not only provides basis and reference for reasonably designing and using of this equipment, but also provides reference for the design and the use of other products of the same type.