本文選題：不平順 + 車橋耦合　； 參考：《固體力學學報》2016年06期

【摘要】：考慮到傳統(tǒng)的Hertz彈簧模型進行車橋耦合動力學分析存在諸多問題,基于簡單的車橋耦合模型,導出了車橋耦合與非耦合動力學方程.考慮軌道周期和隨機不平順情況,車輛在不平順軌道曲線上運行時,當離心力大于車輛自重時,自動確定車輛的起跳時間和起跳高度.起跳后的車輛在重力作用下,將重新回到梁上,同時對梁有一沖擊作用力.文章假設了此沖擊力的作用規(guī)律,并由有限元模擬確定沖擊力系數.通過自編程序,對單軸行車簡支梁進行了數值計算.數值分析結果表明,考慮跳車沖擊力的動力模型能夠更加精準地反應車橋耦合振動特征,且本模型首次給出了跳車高度.考慮軌道具有相同幅值的周期不平順和隨機不平順時,軌道隨機不平順將導致橋梁,尤其是車輛的響應更大,舒適性更差或結構更危險,在車橋耦合動力學分析中應重點關注.
[Abstract]:Considering that there are many problems in the traditional Hertz spring model for vehicle-bridge coupling dynamic analysis, based on the simple vehicle-bridge coupling model, the vehicle-bridge coupling and non-coupling dynamic equations are derived. Considering the track cycle and random irregularity, when the vehicle runs on the track irregularity curve, when the centrifugal force is larger than the vehicle weight, the take-off time and the take-off height of the vehicle are determined automatically. After taking off, the vehicle will return to the beam under the action of gravity and have an impact force on the beam at the same time. In this paper, the law of the impact force is assumed, and the impact force coefficient is determined by finite element simulation. Through self-compiled program, the simple beam of single axle crane is numerically calculated. The numerical results show that the dynamic model considering the impact force can reflect the coupled vibration characteristics of the vehicle and bridge more accurately, and the height of the jump is given for the first time in this model. Considering the periodic irregularity and random irregularity of track with the same amplitude, the random irregularity of track will lead to greater response, worse comfort or more dangerous structure of the bridge, especially the vehicle. Therefore, attention should be paid to the analysis of vehicle-bridge coupling dynamics.
【作者單位】： 華中科技大學土木工程與力學學院;
【基金】：國家自然科學基金項目(51678264)資助
【分類號】：U441.7;U211.3

【相似文獻】

相關期刊論文 前10條

1 ;合肥車橋有限責任公司[J];城市車輛;2002年06期

2 余學文;包忠有;;受路面激勵引起車橋響應頻譜的研究[J];華東交通大學學報;2008年02期

3 王文虎;伍祁林;;基于射頻技術的車橋總成過程管理系統(tǒng)工位終端設計[J];機電產品開發(fā)與創(chuàng)新;2009年01期

4 杜鵬;;沖擊載荷作用下的車橋瞬態(tài)響應分析[J];北京汽車;2010年06期

5 馮吉瑜;;龍頭企業(yè)帶動“車橋之鄉(xiāng)”升級[J];汽車零部件;2010年10期

6 張家啟;鄭泉;陶奕驍;王社會;;面向大規(guī)模定制的汽車車橋變型設計方法研究[J];機械科學與技術;2011年09期

7 劉勇;;蓬翔礦用車橋贏美譽[J];駕駛園;2012年05期

8 劉義;盧鳳友;;談汽車車橋的維修[J];黑龍江科技信息;2012年20期

9 王忠勝;;車橋分裝線的設計與應用[J];重型汽車;2012年05期

10 陳U，

本文編號：1774842