新型金属管组合海洋平台结构抗冰性能研究

为了研究不同材质组合海洋平台的抗冰激振动性能,文中提出了不锈钢管混凝土-钢组合海洋平台和铝合金管混凝土-钢组合海洋平台结构,并对其进行抗冰性能分析。采用有限元软件ANSYS对三条实测挤压冰作用下的三种组合海洋平台进行冰激振动数值模拟研究,通过平台四个主要节点的最大加速度与位移时程曲线分析不同类型海洋平台的减振性能。研究结果表明,与原钢制海洋平台相比,不锈钢管混凝土-钢组合海洋平台和铝合金管混凝土-钢组合海洋平台减振效果均较为明显。特别是不锈钢管混凝土-钢组合海洋平台,以实测冰荷载push1为例,290节点最大位移和加速度减幅为52.16%和49.20%,而铝合金管混凝土-钢组合海洋平台最大位移和加速度减幅为14.29%和13.76%。

STUDY ON ANTI-ICING PERFORMANCE OF NEW METAL PIPE COMBINED OFFSHORE PLATFORM STRUCTURE

In order to study the ice-induced vibration performance of Marine platform with different material combinations, This paper proposes two kinds of new metal tube concrete-steel combination offshore platform structure of stainless steel pipe concrete-steel combination offshore platform and aluminum alloy pipe concrete-steel combination offshore platform, and their ice-resistant performance was analyzed. Finite element software ANSYS was used to carry out numerical simulation research on ice-induced vibration of three combination offshore platforms under the action of three measured extruded ice, and the vibration damping performance of different offshore platforms was analyzed through the maximum acceleration and displacement time history curves of four main nodes of the platforms. The research results show that compared with the original steel offshore platform, the stainless steel pipe concrete-steel combination offshore platform and the aluminum alloy pipe concrete-steel combination offshore platform have better vibration damping effects, especially the stainless steel pipe concrete-steel combined offshore platform, taking Push1 for example, the maximum displacement and acceleration of 290th node are reduced by 52.16% and 49.20%, while that corresoponding to the aluminum alloy concrete-steel combination offshore platform are respectively 14.29% and 13.76%.