Abstract The near-trapping effects on wave-induced dynamic seabed response and liquefaction close to a multi-cylinder foundation in storm wave conditions are examined. Momentary liquefaction near multi-cylinder structures is simulated using an integrated wave-structure-seabed interaction model. The proposed model is firstly validated for the case of interaction of wave and a four-cylinder structure, with a good agreement with available experimental measurements. The validated model is then applied to investigate the seabed response around a four-cylinder structure at 0° and 45° incident angles. The comparison of liquefaction potential around individual cylinders in an array shows that downstream cylinder is well protected from liquefaction by upstream cylinders. For a range of incident wave parameters, the comparison with the results for a single pile shows the amplification of pressure within the seabed induced by progressive wave. This phenomenon is similar to the near-trapping phenomenon of free surface elevation within a cylinder array.

中文翻译：

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波柱相互作用对圆柱阵列周围孔隙水压力和液化的近捕获效应

摘要 研究了风暴波条件下多圆柱地基附近波浪引起的动态海底响应和液化的近捕获效应。使用集成的波浪-结构-海床相互作用模型模拟多圆柱结构附近的瞬时液化。所提出的模型首先在波浪和四缸结构相互作用的情况下进行了验证，与可用的实验测量结果吻合良好。然后应用经过验证的模型来研究在 0° 和 45° 入射角下围绕四圆柱结构的海床响应。阵列中各个气瓶周围液化潜力的比较表明下游气瓶受到上游气瓶的良好保护，免于液化。对于一系列入射波参数，与单桩结果的比较显示了行波引起的海床内压力的放大。这种现象类似于圆柱阵列内自由表面高程的近捕获现象。