摘要
针对本研究团队提出的时间步优化方法,在具备优化时间步长与外荷载同步变化特性的基础上,本文进一步分析了优化时间步长与计算精度的相关性。并且,基于收敛性、稳定性、计算精度和计算效率四个方面对时间步优化方法的优劣进行了评价,得出以下结论:采用时间步优化方法对原动力数值计算程序进行时间步优化后,可以在保证计算精度的同时,非常有效地提高计算效率;保证了计算的收敛性至少不低于原程序,而且在一定程度上提高了原程序的计算稳定性。
According to the time step optimization method proposed by our research team,on the basis of the characteristic of synchronous change of optimized time step and external load,this paper further analyzed the correlation between optimized time step and calculation accuracy.Then based on the convergence,stability,calculation accuracy and computation efficiency,the advantages and disadvantages of the time step optimization method were evaluated,and the following conclusions were drawn:the time step optimization method was adopted to optimize the original dynamic numerical program,which could not only ensure the accuracy of the calculation,but also improve the efficiency of the calculation,and ensure the convergence of the calculation was at least not lower than the original program,and improve the stability of the original program to some extent.
作者
李靖
李彬
唐小微
Li Jing;Li Bin;Tang Xiaowei(School of Urban Construction,Wuchang University of Technology,430223,Wuhan,China;College of Mechanical and Architectural Engineering,Taishan University,271000,Tai'an,China;State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,116024,Dalian,China)
出处
《应用力学学报》
CAS
CSCD
北大核心
2021年第5期1809-1814,共6页
Chinese Journal of Applied Mechanics
基金
国家自然科学基金(51639002)
湖北省高等学校省级教学研究项目(2016449)。
关键词
时间步优化
时间步长
计算效率
计算精度
time step optimization
time step
computation efficiency
calculation accuracy
