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为探究随机波作用下沉入式大圆筒结构的失稳破坏机理 ,文章进行了不同波浪条件下的随机波水槽实验并测取了结构表面的动土压力时程 ,通过在时域和频域的综合分析并结合结构的实际失稳状态 ,文章对沉入式大圆筒结构的失稳破坏机理进行了探索和阐释。研究表明 ,必须充分重视随机波作用下地基土动力特性的演变 ,结构的振动响应导致地基土强度软化以及不可逆塑性变形的发展 ,以致在波浪的持续作用下使结构发生倾斜并最终倾倒 ,是随机波作用下沉入式大圆筒结构失稳破坏的主要原因
In order to explore the mechanism of instability failure of a large-diameter submerged cylindrical structure under random waves, a random wave tank experiment under different wave conditions was carried out and the dynamic pressure history of the structure surface was measured. Through time-domain and frequency-domain Based on a comprehensive analysis and combined with the actual instability of the structure, this paper explores and explains the mechanism of the failure of the large-diameter submerged casing. The research shows that we must give full attention to the evolution of the dynamic characteristics of foundation soil under random wave. The vibrational response of the structure leads to the softening of the soil strength and the irreversible plastic deformation, so that the structure tilts and eventually dumps under the continuous action of waves. Main Causes of Failure of Sinking Large Cylinder Structure under Wave Action