在PLAXIS中实现实用的沙子构成模型与高循环积累框架相结合
Pishun Tantivangphaisal1, David M G Taborda1, Stavroula Kontoe2
1Department of Civil and Environmental Engineering, Imperial College London, Exhibition Road, London SW7 2AZ, United Kingdom.
MethodsX
|February 20, 2025
概括
一个修改的高循环积累 (HCA) 框架增强了海上风力轮机基础的土壤建模. 这种改进的数值模型准确地模拟了循环波负荷下的沙子行为,这对于基础设计至关重要.
科学领域:
- 地质技术工程 地质技术工程
- 计算力学 计算力学 计算力学
- 离岸工程 在海上工程.
背景情况:
- 在周期性负荷下精确模拟土壤行为对于海上风力轮机基础设计至关重要.
- 现有的构成模型可能无法完全捕捉波浪诱导的循环应激下沙子反应的复杂性.
- 数字工具需要对实际工程应用进行高效的实现.
研究的目的:
- 提出一个修改的高循环积累 (HCA) 框架,与沙子的实际构成模型相集成.
- 在PLAXIS中实现这种合模型作为用户定义的土壤模型.
- 用实验室测试数据和工程设计场景来验证数值实现.
主要方法:
- 修改HCA框架,以纳入一个实用的沙子构成模型.
- 在PLAXIS中开发一个高效的工作流程,用于在低循环和高循环组成方程之间切换.
- 实施的模型与卡尔斯鲁厄和敦刻尔克沙子的实验数据的验证.
- 验证模型在单元和边界值问题尺度上的性能,使用在侧向周期波负载下15MW海上风力轮机单基.
主要成果:
- 在PLAXIS中实现的用户定义的土壤模型成功模拟了循环负荷下的沙子行为.
- 该模型与卡尔斯鲁厄和敦刻尔克沙的实验数据有很好的一致性.
- 对不同负载级别的海上风力轮机基础场景的验证证实了该模型的工程适用性.
结论:
- 修改后的HCA框架与实用的构成模型相结合,为分析海上地质工程中的沙子行为提供了强大的工具.
- 在PLAXIS的高效实施方便实用的工程设计和断基础的分析.
- 数值模型的验证证明了其可靠性,用于预测循环波负荷下的基础性能.
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