Research On Dynamic Response Of High Speed Railway

With the development of high speed railway,the security and stability of train circulatestand out increasingly. The accumulative settlement asymmetry sinkage under repetitious trainload andrail unevenness underasymmetry sinkagewill affectthe move speed and line maintain.Furthermore, the elastic distortion reflect on the surface of railway which produced by roadbedduring high speed running can important affect train high speed running condition. If the elasticdistortion is great, the velocity of the train can't increase. Therefore, the deformation problembecomes the main control factor of the high speed railway roadbed. While the dynamiccharacteristicofhighspeedrailwayroadbedunder trainloadisnoticedbyengineeringfield.The paper develops these research work surrounding the dynamic response of high speedrailwayroadbed:1. The paper analyzes the principle and methodin common useof the roadbed dynamicresponse.2. It simulates thehigh speed moving train load by four function through analyzing themechanismproducingbytrain.3. It gained the steady respond solution in time region by means of establishingdynamics equationunderelastichalfspacecombiningboundarycondition.4. It analyzes the wave spreading law under layered groundsill under train load, andestablishesfinity element-infinityelement couplingequation.5. This paper carries throughdynamic characteristics examination research accordingtothe expanding soil roadbed engineering of Xi'an Nanjing railway Hefei Nanjingsegment high speed railway. And it gained the changelaw of roadbed elastic-plasticdistortion anddynamicstress.6. It establishes the finite model by using ANSYS. It analyzes the displacement andstress changingin the roadbed while the train run unilateralismandbidirectional, anditproducestimehist analyzesonsomekeypoints.7. The paper putsforward the method high speed railway soft soil roadbed disposaland...