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(同濟(jì)大學(xué)建筑工程系 上海 200092)
【提要】 對實(shí)際工程應(yīng)用中的某單回路輸電鐵塔斜材的振動原因進(jìn)行了分析，通過建立有限元分析模型并進(jìn)行動力特性分析，指出橫隔面以及塔腿斜平面的布材不合理是導(dǎo)致鐵塔斜材振動的主要原因，通過施加初始激勵證實(shí)了主材扭轉(zhuǎn)對斜材振動也有一定影響，由此提出了曲臂、橫隔面以及塔腿斜平面改進(jìn)后的合理布材形式，以供實(shí)際工程設(shè)計(jì)參考。
【關(guān)鍵詞】 輸電鐵塔 振動分析 動力特性 動力響應(yīng)
Vibration Analysis on Cross Members of a Steel Transmission Tower/Wu Jing,Deng Hongzhou,Fu Pengcheng(Department of Building Engineering,Tongji University,Shanghai 200092,China)
Abstract:The vibration of cross members of a single circuit steel transmission tower is analyzed,and finite element analysis models are established.Through the model establishment  and timehistory analysis,it is pointed out that the inapposite arrangement of cross sections and slant planes of legs are the main factors of the vibration.By initi
ally exciting one point of the tower,the torsion of chord members is also testified to the influence on the vibration.Consequently,improved arrangements of braces,cross sections and slant planes of legs,are recommended.
Keywords:steel transmission tower; vibration analysis; dynami
c behavior; dynamic response
*國家自然科學(xué)基金資助項(xiàng)目(50078040)。