Development of peer‐to‐peer (P2P) internet online hybrid test system
Development of peer‐to‐peer (P2P) internet online hybrid test system
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DOI：
10.1002/eqe.561
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发表时间：
2006-06
影响因子：
4.5
通讯作者：
P. Pan;Hiroshi Tomofuji;Tao Wang;M. Nakashima;M. Ohsaki;K. Mosalam
中科院分区：
文献类型：
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作者：
P. Pan;Hiroshi Tomofuji;Tao Wang;M. Nakashima;M. Ohsaki;K. Mosalam
提出了一种新的互联网在线混合考试系统，称为“对等（P2P）互联网在线混合考试系统”。在该系统中，模拟的结构被分成多个子结构，每个子结构在地理上分布的位置进行并行的数值分析或物理测试。运动方程不是针对整个结构而是针对每个子结构单独制定的。子结构被视为高度独立的系统，只有标准的I/O，即位移和力的边界，被用作接口。开发了一个配备了基于拟牛顿迭代的迭代算法的“协调器”，以实现边界的兼容性和平衡。为了避免子结构物理试验的迭代，采用了两轮拟牛顿迭代和假定弹性刚度的试验程序。提出了一种基于套接字机制的快速、稳定的Internet数据交换解决方案。进行了基础隔震结构的示范试验，并将结果与使用传统试验方法的在线混合试验进行了比较。从P2P互联网混合测试中获得的结果非常接近从传统测试中获得的结果。还进行了调查的时间消耗和控制精度。结果表明，采用套接字机制的互联网数据交换解决方案速度快，并在构建的互联网在线混合测试环境下成功完成了测试。版权所有© 2006约翰威利父子有限公司.
A new Internet online hybrid test system, designated the ‘peer‐to‐peer (P2P) Internet online hybrid test system’, is proposed. In the system, the simulated structure is divided into multiple substructures, and each substructure is analysed numerically or tested physically in parallel at geographically distributed locations. The equations of motion are not formulated for the entire structure but for each substructure separately. Substructures are treated as highly independent systems, and only standard I/O, i.e. displacements and forces at the boundaries, are used as interfaces. A ‘Coordinator’ equipped with an iterative algorithm based on quasi‐Newton iterations is developed to achieve compatibility and equilibrium at boundaries. A test procedure, featuring two rounds of quasi‐Newton iterations and using assumed elastic stiffness, is adopted to avoid iteration for the substructure being tested physically. A fast and stable solution using a socket mechanism is developed for data exchange over the Internet. Demonstration tests applied to a base‐isolated structure was conducted, and the results are compared with an online hybrid test using the conventional test method. The results obtained from the P2P Internet hybrid test match very closely those obtained from the conventional tests. Investigations are also carried out on time consumption and control accuracy. The results show that the Internet data exchange solution using the socket mechanism is fast, and tests were completed successfully under the constructed Internet online hybrid test environment. Copyright © 2006 John Wiley & Sons, Ltd.