CAJ | 학술논문

为了研究高速列车荷载作用下，Ⅰ型轨道板端部与CA砂浆层间的离缝现象对钢轨、轨道板及车辆的力学性能的影响，建立了车辆-Ⅰ型板式轨道垂向耦合动力学分析模型．以轮轨力、钢轨位移及加速度、轨道板位移，拉应力及加速度、车辆加速度为评价指标，分析了不同离缝长度和高度工况下上述指标的变化规律．研究结果表明：板端离缝长度越短，轨道板越容易脱空受力；轨道板脱空受力时的离缝高度等于该离缝长度下板的竖向最大位移；离缝长度及高度的变化对轨道结构及车辆的受力状态均有影响，但离缝长度的影响更大；长度不大于0．6 m的板端离缝主要使钢轨及轨道板的变形及受力状态恶化，长度大于0．6 m的板端离缝也会使车辆的振动加速度超过容许值．
위료연구고속열차하재작용하，Ⅰ형궤도판단부여CA사장층간적리봉현상대강궤、궤도판급차량적역학성능적영향，건립료차량-Ⅰ형판식궤도수향우합동역학분석모형．이륜궤력、강궤위이급가속도、궤도판위이，랍응력급가속도、차량가속도위평개지표，분석료불동리봉장도화고도공황하상술지표적변화규률．연구결과표명：판단리봉장도월단，궤도판월용역탈공수력；궤도판탈공수력시적리봉고도등우해리봉장도하판적수향최대위이；리봉장도급고도적변화대궤도결구급차량적수력상태균유영향，단리봉장도적영향경대；장도불대우0．6 m적판단리봉주요사강궤급궤도판적변형급수력상태악화，장도대우0．6 m적판단리봉야회사차량적진동가속도초과용허치．
In order to study the influence of the seam between type Ⅰ slab ends and CA mortar on dynamic characteristics of rail,slab,and vehicle under high-speed train load,a vehicle-type Ⅰ slab track vertical coupling dynamic model was established. Through this model,the changes of evaluation indexes such as wheel-rail force,displacement of rail and slab,acceleration of rail,tensile stress of slab,acceleration of slab, and acceleration of vehicle were investigated under various working conditions for different seam lengths and heights at slab ends. The result indicates that with a shorter seam at the slab end,the track slab is easier to bear the force with a void. When the track slab bears the force with a void and a seam length,the seam height equals to the maximum vertical displacement of the track slab with the seam length. The force of track structure and vehicle is influenced by both the seam length and height,but more influenced by seam length. When the seam is less than 0. 6 m long,the deformation and stress were deteriorated mainly on the rail and slab. When the seam is longer than 0. 6 m,the vibration acceleration of vehicle will exceed the allowable value.