Damping Behavior of Bituminous Coal Under Impact Loading: A Comparison of Numerical and Experimental Study
摘要
In the present study, the damping behavior of bituminous coal under impact loading through experimental and numerical approaches has been conducted. The damping response of bituminous coal is crucial from the designing and optimizing coal handling systems and structures. Experiments were conducted on coal samples in damped and undamped conditions using a variable head-free falling machine at three varying heights viz. 1 m, 1.5 m, and 2 m. The objective was to analyze the effect of damping by tuned mass dampers on the contact force, strain, and damage characteristics of the coal under impact conditions. For the numerical analysis, ABAQUS, a widely recognized finite element method software was employed to simulate the impact behavior and validate the experimental results. The numerical model incorporated the coal’s material properties, the impact conditions from the drop tests, and the application of tuned mass dampers (TMDs) for the damped scenarios. The simulation results provided detailed insights into the findings from both the experimental and numerical investigations, it has depicted that the use of tuned mass dampers significantly reduced contact forces and strain levels, mitigating damage in the coal samples. Higher drop heights resulted in increased impact forces and strain, but the application of TMDs effectively dissipated energy, reducing the extent of damage. The results highlight the importance of damping mechanisms in controlling the dynamic response and enhancing the durability of bituminous coal under impact loads.