تحلیل پایداری شبیه سازی هیبرید زمان- واقعی سازه چند طبقه بر اساس تأخیر زمانی عملگر هیدرولیکی

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشگاه گلپایگان

چکیده

شبیه سازی هیبرید زمان- واقعی )RTHS )نوعی شبیهسازی است که در آن یک قسمت واقعی از یک سازه در کنار شبیه سازی زمان- واقعی بقیه اجزای آن سازه تست می شود. در این مقاله یک ساختمان با سازه چند طبقه به بخش های عددی و واقعی تقسیم شده و رفتار ارتعاشی طبقات واقعی در میان شبیه سازی عددی بقیه طبقات بررسی می شود. برای اعمال اثر نیرو و اینرسی ناشی از بقیه طبقات به طبقه واقعی مورد نظر، از یک عملگر الکترو هیدرولیکی استفاده می شود. دینامیک عملگر هیدرولیکی را می توان با یک تأخیر زمانی تقریب زد و این تأخیر زمانی در حلقه بسته شبیه سازی می تواند باعث کاهش دقت و یا ناپایداری سیستم گردد. بنابراین از معادالت دیفرانسیل تأخیری )DDE ) برای تعیین تأخیر زمانی بحرانی وابسته به پارامترهای سیستم استفاده می شود. نتایج حاصل از شبیه سازی بیانگر تأثیر پارامترهای بدون بعد و پارتیشن بندی سازه در پایداری شبیه سازی هیبرید است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Stability Anaysis of Real-time Hybrid Simulation for a Multi-story Structure Considering Time-delay of Hydrolic Actuator

نویسندگان [English]

  • Mostafa Nasiri
  • Ali Safi
Golpayegan university
چکیده [English]

Real-Time Hybrid Simulation (RTHS) is a kind of simulation in which an experiment part of a structure tested within the real-time simulation of its other parts. In this article, a building with multi-story structure divided into numerical and experimental substructures and the vibration behavior of experiment story studied among the numerical simulation of other stories. To apply the effect of static and inertial forces produced by the other stories to the experimental story, an electrohydraulic actuator is used. The dynamic of the electrohydraulic actuator can be estimated by pure time-delay and this delay in the loop of simulation can reduce accuracy and cause the system instability. Therefore, Delayed Differential Equation (DDE) used to determine the critical time-delay depending on the system parameters. The results of simulation show the effect of non-dimensional parameters and time-delay in stability margin of hybrid simulation.

کلیدواژه‌ها [English]

  • Real-time hybrid simulation (RTDH)؛ Hydraulic actuator
  • time-delay
  • stability
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