基于输电塔地震响应的数值方法精度可靠性研究
|
摘要
针对使用ANSYS软件进行结构动力分析时大多仅关心计算结果的收敛性而忽视计算结果的精度问题,采用ANSYS软件中PJ和HHT两种数值求解方法,选取合适的积分步长,对输电塔模型在地震荷载作用下的动力响应进行了数值模拟,通过对比分析数值模拟结果的相对误差,发现积分步长为Δt≤0.010Tmax、Δt≤0.018Tmax时可作为PJ、HHT方法的精度控制准则,HHT方法的计算精度高于PJ方法。
When ANSYS software is used to analyze structural dynamics,it is always concerned with the convergence of calculation results and ignoring the accuracy.By selecting the appropriate integral step,the PJ and HHT numerical methods in ANSYS software are adopted to simulate the dynamic response of transmission tower model under action of seismic load.And then the relative error of numerical simulation results is compared.It is found that integral step Δt≤0.010Tmax and Δt≤0.018Tmax and can be used as the criterion of accuracy control for PJ and HHT methods;the calculation accuracy of HHT method is higher than that of the PJ method.
When ANSYS software is used to analyze structural dynamics,it is always concerned with the convergence of calculation results and ignoring the accuracy.By selecting the appropriate integral step,the PJ and HHT numerical methods in ANSYS software are adopted to simulate the dynamic response of transmission tower model under action of seismic load.And then the relative error of numerical simulation results is compared.It is found that integral step Δt≤0.010Tmax and Δt≤0.018Tmax and can be used as the criterion of accuracy control for PJ and HHT methods;the calculation accuracy of HHT method is higher than that of the PJ method.
引文
[1]Newmark N M.A Method of Computation for StructuralDynamics[J].ASCE Journal of Engineering Mechan-ics,1959,85(3):67-94.
[2]张伟.直升机旋翼气动弹性响应的数值积分算法研究[D].南京:南京航空航天大学,2010.
[3]冯云巍.输电塔架ANSYS建模及动力特性研究[J].钢结构,2008,23(1):21-23,31.
[4]尹鹏,李黎,胡亮霞,等.大跨越输电塔的地震响应研究[J].电力建设,2008,29(12):13-17.
[5]张晓志,曹玲,刘龙江.另类显式逐步积分格式性态的数值模拟研究[J].地震工程与工程振动,2012,32(5):6-10.
[2]张伟.直升机旋翼气动弹性响应的数值积分算法研究[D].南京:南京航空航天大学,2010.
[3]冯云巍.输电塔架ANSYS建模及动力特性研究[J].钢结构,2008,23(1):21-23,31.
[4]尹鹏,李黎,胡亮霞,等.大跨越输电塔的地震响应研究[J].电力建设,2008,29(12):13-17.
[5]张晓志,曹玲,刘龙江.另类显式逐步积分格式性态的数值模拟研究[J].地震工程与工程振动,2012,32(5):6-10.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心