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Abstract
The structural integrity of turbine-generator supporting structures is of utmost importance
for safe and reliable operation. In this study, we analyze the non-linear behavior of the
supporting structure under blast loads using finite element analysis (FEA). The objective is
to understand the dynamic response of the structure and identify potential failure modes. The
FEA model is developed based on the actual geometry and material properties of the
structure. Blast loads are simulated using pressure-time histories obtained from previous
explosion experiments. The results show that the supporting structure exhibits significant
non-linear behavior, including large displacements and deformations. Moreover, localized
plastic deformations are observed, indicating potential failure zones. The findings provide
valuable insights for the design and analysis of turbine-generator supporting structures,
enhancing their robustness and ensuring the safety of power plants.
Research on the effects of blast loads on concrete structures has been conducted extensively
in recent decades. This is primarily due to the increasing risk of deliberate explosive attacks,
accidental explosions, and other types of explosion-related failures that structures worldwide
are facing. The magnitude of blast loads generated by most explosions far exceeds the design
loads considered in traditional structural design. Consequently, this heightened awareness
has prompted building owners, government agencies, and design professionals to prioritize
the ability of buildings to withstand blast loading and ensure the survival of structures in the
face of constant global terrorist attacks.
This research paper focuses on the modeling and dynamic analysis of the foundation of a
steam turbine generator, which is an important and valuable element. While there have been
previous studies on the behavior of reinforced concrete (RC) structures under blast loads,
this paper specifically examines the nonlinear dynamic responses and failure behaviors of
the supporting structure of turbine generators subjected to blast loads using Explicit Dynamic
Analysis in Ansys Workbench. The study investigates the effects of middle-rate impact
loading stresses on the blast responses of RC structures. By conducting dynamic analysis
using Ansys Workbench, the researchers found that the RC structure is significantly
influenced by the blast load. Moreover, they observed that the effect of the blast load
decreases as the distance between the TNT source and the RC structure increases