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| Research on the Control of Track Irregularity of High—speed Railway |
| LI Ming—hua1，LI Li—lin2，HE Xiao—yuan3 |
| 1．East China Jiaotong University，Nanchang，Jiangxi 330013，China；2．The Shimen—Changsha Railway Co．Ltd of Guangzhou Railway Group，Changsha，Hunan 41 0007，China；3．Guangzhou Railway Terminal ConstruCtion Headquarter of Guiyang—Guangzhou Railway，Guangzhou Railway Group，Guangzhou，Guangdong 510600，China |
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Abstract Research purposes: Rapidity，comfort and safety are the three major elements of high—speed railway transportation．Because of the complicated interaCt ion of train and track，the uncontrolled geometric shape of track will lead to the changes between the geometric shape and location of the track．Such changes will bring about the changes of the geometric shape and location of the track and the designed track shape and make the track irregularity，which will affect the safety and the comfort of train．By using the track irregularity value as an incentive，this paper offered the motion equation through the establishment of vertical vibration trains vehicle model on orbit with consideration of the flexibility of track struCI ure，solved the quality matrix，stiffness and damping matrix of the system by using the transform matrix method along with Newmark integration method after Matlab programming，and put forward the vertical acceleration of train and high—low values of track irregularity．
Research conclusions: Through establishing the train model and solving the motion equation，this paper discussed the impaction of the track irregularity on vertical acceleration of train，and with the comparison of the relevant standards at home and abroad，presented the biggest high—low values of track irregularity to meet the requirements when the train speed reached at 300 km／h．Namely，when the vertical acceleration of train can meet the irregular comfortable value of 0．15g，the high—low value of track irregularity could be controlled within 8 mm．When the vertical acceleration of train can meet the maintenance target value of 0．25 g，the high—low value of track irregularity could be controlled within 14 mm．When the vertical acceleration of train can meet the safety management target value of 0．35 g，the high—low value of track irregularity could be controlled within 19 mm．
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Received: 27 June 2009
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2009, Vol. 26 
