无限地基相互作用力时域求解的阻尼溶剂逐步抽取法

发布时间：2018-07-04 10:37

本文选题：无限地基 + 相互作用力　；参考：《工程力学》2015年09期

【摘要】：无限地基相互作用力时域求解的精度及效率是面向实际工程结构动力分析的关键问题。基于阻尼抽取法模拟地基无限域动力特性的思想,从数值实现中的误差源出发,提出了一种施加较大附加人工阻尼再分步依次移频抽取的阻尼溶剂逐步抽取法,并给出了具体实现公式。该方法可以最大限度地消除反射波波动能量及抽取人工高阻尼的影响,提高了算法的精度,降低了人工高阻尼与地基区域大小的相互制约性,并能适应地基有限区域表面几何结构复杂多变的情况,具有较高的工程实用价值。最后,通过对典型三维半无限空间问题的动力反应分析,将计算结果与精确解,阻尼抽取法模型和粘弹性人工边界模型进行对比研究,证明了该方法具有良好的精度和计算效率,并对不规则地基有限域模型进行分析,验证其良好的工程适用性。
[Abstract]:The accuracy and efficiency of the time-domain solution of infinite ground interaction force is a key problem in dynamic analysis of practical engineering structures. Based on the idea of damping extraction method to simulate the dynamic characteristics of foundation in infinite domain, a damping solvent extraction method based on the error source in numerical realization is proposed. The realization formula is given. This method can eliminate the influence of reflected wave energy and extract artificial high damping to the maximum extent, improve the accuracy of the algorithm, and reduce the mutual constraint between artificial high damping and the size of foundation area. It can adapt to the complicated and changeable surface geometry in the finite area of foundation, and has high practical value in engineering. Finally, by analyzing the dynamic response of a typical three-dimensional semi-infinite space problem, the results are compared with the exact solution, the damping extraction model and the viscoelastic artificial boundary model. It is proved that the method has good accuracy and calculation efficiency, and the finite field model of irregular foundation is analyzed to verify its good engineering applicability.
【作者单位】：大连大学土木工程技术研究与开发中心;大连理工大学海岸与近海国家重点实验室抗震分室;
【基金】：国家自然科学基金项目(51378085,51008040) 中央高校基本科研业务费专项资金项目(DUT13LK16) 辽宁省教育厅科研项目(L2013465) 国家重大科技专项“cap1400安全审评技术与独立验证试验”课题项目(2011ZX06002-10)
【分类号】：TU435

【参考文献】