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Finite Element modeling of the behavior of salt caverns under cyclic loadingтезисы доклада
- Авторы: Khaledi K., Mahmoudi E., Schanz T., Datcheva M.
- Сборник: Geomechanics from Micro to Macro
- Том: 1
- Тезисы
- Год издания: 2015
- Издательство: Taylor & Francis.
- Местоположение издательства: London, England
- Первая страница: 945
- Последняя страница: 950
- DOI: 10.1201/b17395-169
- Аннотация: The tendency to shift from fossil and nuclear energy sources to renewable energy carriers in Germany leads to the necessity to develop effective energy storage systems. Nowadays, caverns excavated in rock salt formations are recognized as the appropriate option for underground storage of energy in the form of compressed air, hydrogen and natural gas. On the other hand, accurate design of these underground cavities requires suitable numerical simulations employing proper constitutive models to describe the material behavior of rock salt under various geological conditions. Numerous investigations have been carried out by different scientists during the past decades in order to find a good description for the mechanical properties of rock salt. However, the cyclic response of caverns which are integrated with renewable energy systems is still a challenging task. These caverns store energy for a short period of time (i.e. hours to days). That means the operating pressure inside the cavern periodically changes in a certain range. This work investigates the influence of operating pressures on the response of the host rock. To accomplish this, a rate dependent model is selected to describe the cavern’s response under periodic loading condition. This model is implemented in the finite element code CODE-BRIGHT, then its application in numerical modeling of salt caverns is illustrated. The numerical example provides information on the transient pressure distribution on the cavern boundary to predict damage propagation. Finally, the long term response of the salt cavern is evaluated and some general recommendations concerning the allowable internal pressure in practice is given.
- Добавил в систему: Datcheva Maria Dimitrova