兩跨連續(xù)磁浮軌道梁動力性能分析*
招 陽1，賈 峰2， 時 瑾3
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（1 國家知識產(chǎn)權(quán)局專利局專利審查協(xié)作北京中心，北京 100090；2 交通運輸部規(guī)劃研究院，北京 100028；3 北京交通大學，北京 100044）[摘要] 兩跨連續(xù)梁是磁浮交通工程中常見的結(jié)構(gòu)形式，本文建立了兩跨連續(xù)梁墩體系有限元模型，分析了約束條件對自振特性影響，進行了列車作用下連續(xù)梁動力響應分析，研究表明：軌道梁由簡支變連續(xù)后各階自振頻率都有所降低；兩跨連續(xù)梁支座約束布置不對稱可導致振動形態(tài)復雜；隨著列車速度提高軌道梁和車輛響應總體呈提高趨勢，兩跨連續(xù)梁無明顯共振現(xiàn)象，車輛振動響應在速度超過[關(guān)鍵詞] 鐵路運輸;磁浮交通;兩跨連續(xù)梁;自振;動力響應中圖分類號：U213 文獻標識碼：A 文章編號：1002-848X(2013)S1-0240-04*基金項目：國家自然科學基金(51008018)。作者簡介：招陽，女，博士，助理研究員，Email:zhaoyang_1@sipo.gov.cn。Dynamic characteristics analysis on two-span continuous guideway of high-speed maglev lineZhao Yang1, Jia Feng2, Shi Jin3（1 Patent Examination Cooperation Center of the Patent Office, SIPO, Beijing 100090, China; 2 Transport Planning and Research Institute, Ministry of Transport, Beijing 100028, China; 3 Beijing Jiaotong University Beijing 100044, China）Abstract：A two-span continuous guideway-pier FEM model is established in this paper according to the common guideway in high-speed maglev line. Effect of the restraint conditions on the natural frequencies of guideway is analyzed and dynamic response of continuous guideway under train load is simulated. The results show that the natural frequencies will reduce if the guideway change from single style into two-span continuous style; the modes will be more complex if the restraints are antisymmetric; the dynamic response will get more obvious while the speed of the train get higher but no resonance will occur; the dynamic response is sharply increase when the train speed exceedKeywords：railway transport; high speed maglev transport; two-span continuous guidway; natural vibration; dynamic response
