Page 59 - 《振动工程学报》2025年第11期
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第 11 期                 王天鹏,等:考虑冲刷的海上风电单桩-海床-结构地震响应分析                                       2517

              素对结构动力响应峰值的影响效果相反。本文发现                            [4]  YU  H, ZENG  X  W, LI  B, et  al.  Centrifuge  modeling  of
              共振效应可能产生主导影响,导致结构动力响应峰                                offshore  wind  foundations  under  earthquake  loading[J].  Soil
              值随冲刷深度增大而单调增大,如图                 6(m)~(o) 所示;         Dynamics and Earthquake Engineering,2015,77:402-415.
                                                                [5]  DE  RISI  R, BHATTACHARYA  S, GODA  K.  Seismic
                  (2)两因素对结构残余变形的影响趋势相同,所
                                                                    performance assessment of monopile-supported offshore wind
              以均导致残余变形随冲刷深度增大而单调增大,如
                                                                    turbines  using  unscaled  natural  earthquake  records[J].  Soil
              图     7(e) 所示。                                        Dynamics  and  Earthquake  Engineering, 2018, 109: 154-
                                                                    172.
              4    结     论                                      [6]  焦钰祺,乔东生,唐国强,等. 考虑冲刷影响的海上风电
                                                                    单桩基础动力响应分析        [J]. 清华大学学报(自然科学版),
                                                                    2025,65(8):1455-1464.
                  考虑不同冲刷条件,本文建立了一系列海上风
                                                                    JIAO  Yuqi, QIAO  Dongsheng, TANG  Guoqiang, et  al.
              电单桩-海床-结构数值模型,并通过离心模型振动台                              Dynamic response of monopile foundations for offshore wind
              试验对数值模型进行了验证。可液化海床土体的动                                turbines with scour effects[J]. Journal of Tsinghua University
              力特性采用      CycLiq  本构模型合理刻画。通过分析不                     (Science and Technology),2025,65(8):1455-1464.
              同冲刷条件和输入地震动作用的海上风电单桩-海                            [7]  ZHU B,WU X F,WANG Y B,et al. Centrifuge modeling
              床-结构地震响应,系统揭示了冲刷对单桩支承海上                               for seismic response of fixed-end model piles considering local
                                                                    scour[J].  Journal  of  Waterway, Port, Coastal, and  Ocean
              风机整体结构地震响应的影响机理。主要结论如下:
                                                                    Engineering,2020,146(6):04020041.
                  (1)随着冲刷深度的增大,结构的              1  阶自振频率
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              降低,桩-土相互作用削弱。其中,自振频率的降低                               DNVGL,2018.
              受海床土体液化弱化程度影响,液化弱化程度较高                            [9]  SUMER  B  M, FREDSØE  J, CHRISTIANSEN  N.  Scour
              时结构自振频率进一步降低。                                         around vertical pile in waves[J]. Journal of Waterway,Port,
                  (2)冲刷主要通过两方面因素影响结构地震响                             Coastal,and Ocean Engineering,1992,118(1):15-31.
                                                                [10]  ZANKE U C E,HSU T W,ROLAND A,et al. Equilib-
              应:结构    1  阶自振频率与输入地震动卓越频率的相
                                                                    rium scour depths around piles in noncohesive sediments under
              对差异和桩-土相互作用变化。
                                                                    currents and waves[J]. Coastal Engineering,2011,58(10):
                  (3)高频地震动作用下,冲刷导致整体结构远离
                                                                    986-991.
              共振频率范围且桩-土相互作用削弱,使结构动力响                           [11]  HEIDARPOUR  M, AFZALIMEHR  H, IZADINIA  E.
              应峰值随冲刷深度的增加呈单调减小趋势,但残余                                Reduction  of  local  scour  around  bridge  pier  groups  using
              变形受两因素联合影响而出现非单调变化。                                   collars[J].  International  Journal  of  Sediment  Research,
                  (4)长周期地震动作用下,冲刷深度增大可能会                            2010,25(4):411-422.
                                                                [12]  LI J L,GUO Y H,LIAN J J,et al. Mechanisms,assess-
              显著放大结构动力响应和残余变形。因此,工程师
                                                                    ments, countermeasures, and  prospects  for  offshore  wind
              需在抗震设计中重视长周期地震动对海上风电结构
                                                                    turbine  foundation  scour  research[J].  Ocean  Engineering,
              的潜在危害。                                                2023,281:114893.
                  本文数值模型采用的捆绑边界条件未能完全模拟                         [13]  LIN C,BENNETT C,HAN J,et al. Scour effects on the
              地震波的辐射阻尼,进而对结构地震响应产生一定影                               response of laterally loaded piles considering stress history of
              响。在未来研究中可采用黏弹性边界与捆绑边界进行                               sand[J]. Computers and Geotechnics,2010,37(7-8):1008-
              对比,以量化不同边界条件对结构地震响应的影响。                               1014.
                                                                [14]  GUO X S,LIU J,YI P,et al. Effects of local scour on fail-
                                                                    ure envelopes of offshore monopiles and caissons[J]. Applied
              参考文献:                                                 Ocean Research,2022,118:103007.

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