Wind-induced Lateral Vibration Study on Boom of 7500t Floating Crane Considering the Axial Clearance between Boom and Pin Hinge

LU Kailiang;QIU Huiqing;MAO Fei;QIN Xianrong;ZHANG Qing

Journal of Vibration and Shock ›› 2009, Vol. 28 ›› Issue (10) : 94-98.

PDF(2243 KB)
PDF(2243 KB)
Journal of Vibration and Shock ›› 2009, Vol. 28 ›› Issue (10) : 94-98.
论文

Wind-induced Lateral Vibration Study on Boom of 7500t Floating Crane Considering the Axial Clearance between Boom and Pin Hinge

  • LU Kailiang1, QIU Huiqing1, MAO Fei1, QIN Xianrong1, ZHANG Qing1
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Abstract

Abstract Based on Kaimal spectrum, a stochastic simulation for along-wind velocity time history is generated with the numerical method of a multidimensional homogeneous process. Applying the acquired stochastic wind load to the FEM model of the 7500t floating crane’s boom, time-domain dynamic analyses are respectively implemented in the conditions of the clearance considered or ignored, which shows that the axial clearance between boom root and pin hinge will intensify the wind-induced lateral vibration of the boom in the horizontal plane, and also illustrates that dynamic wind load is the primary cause of the vibration. Hence, a new method of filling the clearance with rubber spring is proposed in order to reduce lateral vibration. By studying the influence of altering rubber spring’s length and hardness on natural frequency, the maximal displacement, as well as the peak reaction force value to the boom, the optimal parameters of rubber spring are obtained. When the length of rubber spring is about 200mm to 400mm and Shore hardness is about 30 to 50, the optimal effect of vibration reduction is achieved: the maximal displacement decreases by more than 13%, comparing with that in the condition of the clearance considered. It shows that the proposed method of filling the clearance between boom root and pin hinge with rubber spring is feasible for lateral vibration reduction.

Key words

Keywords boom of floating crane / lateral vibration / stochastic wind load / axial clearance / rubber spring

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LU Kailiang;QIU Huiqing;MAO Fei;QIN Xianrong;ZHANG Qing. Wind-induced Lateral Vibration Study on Boom of 7500t Floating Crane Considering the Axial Clearance between Boom and Pin Hinge[J]. Journal of Vibration and Shock, 2009, 28(10): 94-98
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