Еволюція напружено-деформованого стану обладнання та захисних конструкцій АЕС з урахуванням зон руйнування від впливу сейсмічних навантажень

Abstract

На базі системи розрахунку на міцність АПРОКС розроблена математична модель та проведено чисельне моделювання процесів руйнування захисної оболонки АЕС в тривимірній постановці, враховуючи шари бетону з армоканатами, від впливу сейсмічних навантажень. Приведено результати чисельного моделювання зміни напружено-деформованого стану в захисній оболонці АЕС з урахуванням розриву попередньо напружених армоканатів

The present level of development of nuclear power needs for further improvement of nuclear power plants. This investigation can provide further improvement of nuclear power plants to increase their reliability, safety, technical and economic performance, and identify and justify the most promising areas for improvement of basic equipment. In this regard, the definition of a component of the stress-strain state of containment is performed within the space of the task mechanics of deformable solids, so that the impact of stress-strain state on the ropes prestressing reinforcement is essentially not axisymmetric character. The nonlinear physical processes occurring in the containment was apply special eight node curved finite elements with polyline law amendments functions. It allows to receive data specified stress-strain state not only in the membrane of the shell, but also to investigate the change in the more massive construction sites. Testing of the developed mathematical model of containment was performed as part of a program of complex calculations on the strength “APROKS”, which was modified in order to increase the effectiveness of the setting of initial data for calculation of complex spatial structures and enable visualization finite-element model and load default settings. An analysis of the numerical simulation was found maximum principal stress in terms of the gap by two cables located "cross the cross" and two ropes arranged parallel to each other, which revealed the possible destruction of the area in consequence of horizontal seismic waves within 20 seconds