海上风电静力触探中小应变非线性刚度影响的数值研究

张祖国; 朱俊霖; 沈侃敏

doi:doi:10.19912/j.0254-0096.tynxb.2024-1375

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海上风电静力触探中小应变非线性刚度影响的数值研究

更新时间：2026-01-08

- 海上风电静力触探中小应变非线性刚度影响的数值研究
- Vol. 46, Issue 12, Pages: 653-661(2025)
- 作者机构：
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- DOI：doi:10.19912/j.0254-0096.tynxb.2024-1375
  CLC： TU43
- Published Online：07 January 2026，
  
  Published：2025
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张祖国, 朱俊霖, 沈侃敏. 海上风电静力触探中小应变非线性刚度影响的数值研究[J]. 2025, 46(12): 653-661.
DOI：

张祖国, 朱俊霖, 沈侃敏. 海上风电静力触探中小应变非线性刚度影响的数值研究[J]. 2025, 46(12): 653-661. DOI： doi:10.19912/j.0254-0096.tynxb.2024-1375.

摘要

海上风电勘察中用于获取黏土原位参数的静力触探试验

其现有黏土解译方法基于理想弹塑性模型

未充分考虑黏土的小应变非线性刚度特性。该文通过开展数值研究

剖析黏土应力-应变非线性、小应变参数对圆锥贯入锥尖阻力的影响关系

饱和黏土采用双曲线硬化弹塑性模型和小应变弹塑性本构模型

并在ABAQUS有限元软件中模拟圆锥贯入过程。采用ALE重划分技术防止大变形分析中的网格畸变。有限元数值分析表明：土体刚度、土层原位应力、锥面粗糙度和破坏准则等因素均对锥尖承载系数有影响;土体破坏比越大锥尖系数越小;考虑小应变刚度后

锥尖系数有明显的增大

其增幅与小应变刚度、参考剪应变和大应变刚度之间的相对关系有关。对现场工程案例进行分析

表明考虑黏土小应变刚度的锥尖系数评估方法有较好的适用性。

Abstract

The current interpretation methods for the cone penetration test (CPT)

which is used to obtain in-situ parameters of clay in offshore wind power investigations

are based on the elastic-perfectly plastic soil model and do not adequately account for the small-strain nonlinear stiffness characteristics of clay. This paper conducts numerical studies to investigate the impact of clay stress-strain nonlinearity and small-strain parameters on cone tip resistance. Saturated clays are modeled using the hyperbolic hardening elastoplastic model and the small-strain elastoplastic constitutive model

simulating the cone penetration process within the ABAQUS finite element software framework. To mitigate mesh distortion during large deformation analyses

the Arbitrary Lagrangian Eulerian （ALE） remapping technique is adopted. Finite element numerical simulations indicate that soil stiffness

in-situ stress of soil strata

cone surface roughness

and failure criteria significantly influence the cone bearing factor. Moreover

an increased soil failure ratio corresponds to a decreased cone factor. Importantly

accounting for small-strain stiffness leads to a marked augmentation of the cone factor

with the extent of this increase being closely related to the interplay among small-strain stiffness

reference shear strain

and large-strain stiffness. Finally

the proposed method for evaluating the cone factor

which incorporates the small-strain stiffness of clay

is validated through a field engineering case

demonstrating robust applicability.

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references

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