为研究水平循环荷载下侧翼单桩基础结构力学行为特征，采用有限元软件ABAQUS建立侧翼单桩-黏土相互作用三维数值模型，并通过USDFLD子程序引入土体刚度衰减模型，研究黏土海床侧翼单桩基础水平位移累积规律。结果表明：循环荷载下土体刚度、基础嵌入深度、荷载幅值及翼板尺寸会影响侧翼单桩基础水平位移响应，其翼板长、宽及厚度对侧翼单桩基础水平位移的影响强度依次减弱；在循环加载次数较小时，侧翼单桩基础水平位移与土体初始强度之间的关系呈线性关系，随着随循环加载次数增大，二者之间的非线性逐渐增强；局部冲刷会通过减少翼板与土体的接触面积影响侧翼单桩基础水平位移。研究成果不但能够丰富现有桩基理论，而且可为侧翼单桩基础设计提供科学参考。

To investigate the mechanical behavior characteristics of wing-tipped monopile foundations under horizontal cyclic loading, a three-dimensional numerical model of the wing-tipped monopile-clay interaction was established by using the finite element software ABAQUS. A soil stiffness degradation model was implemented via the USDFLD subroutine to analyze the horizontal displacement accumulation mechanism of wing-tipped monopile foundations in clay seabeds. The results indicate that the horizontal displacement response of wing-tipped monopiles under cyclic loading is governed by soil stiffness, foundation embedment depth, load amplitude, and wing plate dimensions, with the influence intensity successively decreasing for wing plate length, width, and thickness. A linear correlation exists between horizontal displacement and initial soil strength under low-cycle loading, while nonlinear characteristics dominate as cyclic load cycles increase. Local scouring alters the horizontal displacement of wing-tipped monopiles by reducing the contact area between wing plates and soil. These findings not only advance existing pile foundation theories but also provide scientific insights for the design of wing-tipped monopile foundations.