【摘要】：隨著高速鐵路在世界各地的迅速發(fā)展,車輛-軌道-橋梁耦合振動研究越來越引起大家的關心。隨之而來列車的安全性和平穩(wěn)性也受到大家的關注。由于高速鐵路的特點,高速鐵路沿線的橋梁比重占的越來越大。當?shù)卣饋砼R時,車輛行駛在橋梁上的幾率就會加大。同時我國又是地震多發(fā)國家,平均每三年發(fā)生兩次七級以上地震,我國現(xiàn)在又大力發(fā)展高速鐵路的建設。因此,為了防止發(fā)生地震時,列車行駛脫軌事故的發(fā)生,研究地震作用下車輛-軌道-橋梁三者耦合振動的安全性和平穩(wěn)性變得非常重要。 (1)考慮車體、兩個轉向架、四個輪對共10個自由度的二維車輛模型,并推導車輛運動方程；通過虛功原理得出軌道和橋梁的運動方程；利用大質(zhì)量法模擬地震動輸入；以ansys為平臺研究地震作用下車輛通過橋梁時的車輛、軌道、橋梁動力響應。 (2)考慮車體、兩個轉向架、四個輪對共27個自由度的三維車輛模型,并推導車輛的運動方程；軌道選取無砟軌道型式,并分為左半無限單元、中心單元、右半無限單元；通過虛功原理得出軌道和橋梁的運動方程；車輛輪對和軌道的耦合關系通過相互接觸的幾何相容性和相互作用力平衡得到,之后通過動力壓縮自由度的方法得到相互作用單元,從而實現(xiàn)車輛-軌道-橋梁三者之間的耦合關系。地震荷載采用大質(zhì)量法輸入于系統(tǒng)中。 (3)車輛在無地震荷載作用下通過橋梁時,針對行車速度不同、車輛雙線行駛的兩種情況,分析車輛-軌道-橋梁系統(tǒng)的動力響應。 (4)在有無地震條件下,研究車輛-軌道-橋梁系統(tǒng)的動力響應；研究車輛的安全性和平穩(wěn)性,包括車輛的輪重減載率、脫軌系數(shù)、車體豎向加速度、車體橫向水平加速度、橋梁豎向位移和加速度、橋梁橫向位移和加速度。
[Abstract]:With the rapid development of high-speed railway in the world, the research of vehicle-track-bridge coupling vibration has attracted more and more attention. The safety and smoothness of the train are also concerned by everyone. Because of the characteristics of high-speed railway, the proportion of bridges along high-speed railway is more and more. When an earthquake strikes, the chances of vehicles driving on bridges increase. At the same time, China is an earthquake-prone country, with an average of two earthquakes with magnitude 7 or more occurring every three years. Therefore, in order to prevent train derailment from occurring during earthquake, it is very important to study the safety and stability of vehicle-track bridge coupling vibration under earthquake. (1) considering the car body, two bogies, The 2-D vehicle model with 10 degrees of freedom in four wheelsets is used to deduce the motion equation of the vehicle, the motion equations of track and bridge are obtained by the principle of virtual work, and the input of ground motion is simulated by the method of large mass. The dynamic response of vehicle, track and bridge under seismic action is studied by using ansys as a platform. (2) considering the vehicle body, two bogies and four wheelsets, a three-dimensional vehicle model with 27 degrees of freedom is considered. The equations of motion of the vehicle are deduced, the type of ballastless track is selected, and the track is divided into left half infinite element, center element and right half infinite element, and the motion equation of track and bridge is obtained by the principle of virtual work. The coupling relationship between vehicle wheelsets and track is obtained by the geometric compatibility of contact and the balance of interaction forces, and then the interaction element is obtained by the method of dynamic compression degree of freedom. Thus, the coupling relationship between vehicle, track and bridge can be realized. The large mass method is used to input the seismic load into the system. (3) when a vehicle passes through a bridge without seismic load, it aims at two situations where the speed of the vehicle is different and the vehicle is running on both lines. The dynamic response of vehicle-track bridge system is analyzed. (4) the dynamic response of vehicle-track bridge system is studied under the condition of earthquake or not, and the safety and stability of vehicle, including the wheel load reduction rate of vehicle, are studied. Derailment coefficient, vertical acceleration of the car body, horizontal acceleration of the car body, vertical displacement and acceleration of the bridge, lateral displacement and acceleration of the bridge.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：U298.1;U270.11

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