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面向显式算法基于Python语言人工边界与地震力可视化建模程序开发与验证
Development and verification of Python-based and explicit algorithm-oriented modeling program for viscous-spring boundary and seismic force
投稿时间:2024-01-02  修订日期:2024-03-07
DOI:
中文关键词:  粘弹性人工边界  地震动输入  显式算法  Python语言  ABAQUS二次开发
英文关键词:viscous-spring boundary  seismic motion input  explicit algorithm  Python language  secondary development of ABAQUS
基金项目:国家自然科学基金(51978461)资助项目.
作者单位邮编
陈志超 天津大学建筑工程学院 300350
柳国环* 天津大学建筑工程学院 300350
费琦翔 天津大学建筑工程学院 
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中文摘要:
      成功自主开发了基于Python语言面向显式算法的可视化接口程序,与大型商业软件ABAQUS精准对接,可高效完成三维粘弹性人工边界建模与等效地震力自动施加。阐明了面向显式算法接口程序的意义及其与传统外挂式及隐式程序的本质区别,在此基础上提出两点式跟随行动线(轴向)弹簧-阻尼元件完全等效的方法,解决了显式算法下接地弹簧-阻尼元件失效的固有问题,验证了其可行性和准确性,为后续程序开发奠定理论基础;推导了程序直接使用的P、SV及SH波垂直入射时等效节点力的时间迟滞效应解析解公式,公式推导过程物理意义清晰且理论完备;阐明了程序的底层逻辑、开发流程及关键函数;最后,以自由场P、SV及SH波同时垂直入射经典算例,验证了建模的粘弹性人工边界对散射波的吸收作用,与理论解吻合。本文成果可用于边界-土-结构相互作用的科学研究与工程实践。
英文摘要:
      A Python-based visual interface program tailored for explicit algorithms was developed, by which it is convenient to achieve the efficient modeling of 3D viscous-spring boundary and automatic application of equivalent seismic force and realize the seamless docking with known commercial software ABAQUS accurately. The meaning of the explicit algorithm tailored interface program and its differences with the original external and implicit algorithm tailored programs are expounded. An approach of using the two-point spring-dashpot element to replace the ground spring-dashpot element is proposed to solve the inherent incompatibility issue of ground spring-dashpot element in the explicit algorithm, and then its feasibility and accuracy is verified, which lays the prerequisite and theoretical foundation for the subsequent program development. Then, the hysteresis-effect analytical solutions used in the program of the nodal equivalent seismic force for P, SV and SH waves vertically incidence are derived and given with clear physical meaning and theoretical completeness. The underlying logic, flowchart and key functions of the program development are clarified. Finally, an example of vertical incidence of P, SV and SH waves is taken to verify the absorption effect of the intelligent viscous-spring boundary on the scattered wave and the results are consistent with classical theoretical one. The results of this paper can be used in the scientific research and engineering practice of boundary-soil-structure interaction.
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