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钢管塔在我国特高压输电线路中应用广泛。在微风作用下圆形截面构件会形成稳定的卡门涡旋，从而导致构件发生微风振动，极易诱发螺栓松动、连接疲劳等问题，危及特高压钢管塔结构安全。针对特高压钢管塔，建立了斜材的力学模型，得到了斜材微风振动的弯曲振动微分方程，给出了其固有频率计算方法，研究了轴力大小和连接刚度对斜材横向弯曲振动频率的影响。运用能量平衡法，考虑风输入能量和螺栓滑移耗能，给出了斜材稳态振幅计算方法。针对SJ3021型特高压钢管塔斜材，研究了风速和连接刚度对斜材振动稳态幅值的影响 ...
冯立言, 江文强, 王彤, 霍仕康
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[Impact of ultrasonic scaling on abutment screw torque in implant restorations]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanTang Y, Zhao X, Yang X, Jia H, Liu Y.
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[Endodontic retreatment of a maxillary second molar with chronic apical periodontitis and separated instrument: A case report]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanZang H, Liang Y.
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[Determination of 30 homologues of phosphatidylcholines and lysophosphatidylcholines in human serum by liquid chromatography-tandem mass spectrometry and their correlation analysis with coronary artery disease]. [PDF]
Se PuLi WY +6 more
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[Diabetic Charcot neuroarthropathy initially misdiagnosed as rheumatoid arthritis and gout: A case report]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanGu J, Li X, Zhao J, Mu R.
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[Application of nanomaterials-enhanced magnetic resonance imaging in precise diagnosis of pan-vascular diseases]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiLi Y, Zhang P, Zhang N.
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