实时混合模拟中偶发计算延迟的产生及影响  

Cause and consequence of occasional computational delay in real-time hybrid simulation

作　　者：黄亮[1,2] 黄慎江[1,2] 王静峰[1,2] 徐伟杰[3] 郭彤[3] Huang Liang;Huang Shenjiang;Wang Jingfeng;Xu Weijie;Guo Tong(College of Civil Engineering,Hefei University of Technology,Hefei 230009,China;Anhui Key Laboratory of Civil Engineering Structures and Materials,Hefei University of Technology,Hefei 230009,China;Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 211189,China)

机构地区：[1]合肥工业大学土木与水利工程学院,合肥230009 [2]合肥工业大学土木工程结构与材料安徽省重点实验室,合肥230009 [3]东南大学混凝土及预应力混凝土结构教育部重点试验室,南京211189

出　　处：《东南大学学报（自然科学版）》2021年第1期80-86,共7页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51478158,51808111,52008145);中央高校基本科研业务费专项资金资助项目(JZ2020HGQA0203).

摘　　要：为了研究试验中计算延迟的产生及影响,分析了滑移支座试验的计算耗时,并评价了试验的实时性.试验发现,在某些积分步骤中会偶然出现计算延迟,破坏了试验的实时性.计算延迟是由于试验中使用了隐式积分算法,在迭代计算中残差收敛速度缓慢所导致的.计算延迟具有偶然性和随机性,不仅影响了试验构件的加载速率,更使指令位移信号呈S形曲线.该信号命令作动器在短时间内急停急转,作动器需克服巨大的惯性力作用,导致响应延迟显著.通过使用显式积分算法、简化数值模型等方法,可显著减少实时混合模拟的积分计算时间,从而避免了计算延迟现象,保障了试验的实时性.To investigate the cause and consequence of computational delay in the experiments,the calculation time of sliding isolator tests was analyzed and the real-time performance was evaluated.The results show that the computational delay occasionally appears at some integration steps,thus destroying the real-time performance of the tests.The computational delay is caused by the slow convergence speed of errors in iterative calculations by introducing the implicit integration algorithm into the tests.The computational delay has contingency and randomness,affecting the load rate of the test specimen and making the command displacement signal present S-shaped curves.The signal commands the actuator to switch from deceleration to acceleration in a short time interval,so that the actuator needs to overcome the huge inertial force,resulting in an obvious actuator response delay.By using the explicit integration algorithm and simplifying the numerical model,the calculation time of real-time hybrid simulation can be greatly reduced,thus avoiding the computational delay and ensuring the real-time performance of the tests.

关 键 词：计算延迟 作动器时滞 预测修正 子步技术 实时混合模拟 

分 类 号：TU317.2[建筑科学—结构工程]