Hammer-Road Interaction Model and Evolution Law of Hammer Acceleration

The main purpose of this paper is to explore the change rules of hammer acceleration during the impact process. The impact force in the real impact process is difficult to measure directly, so we need to measure acceleration to obtain it indirectly. It is difficult to do research through experiments. Numerical simulation is an effective means to research on pavement structure dynamic damage and destruction. A continuous-discrete coupling model is established to explore the change rules of acceleration and impact force under the influence of various factors by changing the hammer weight, hammer height and plate material. The results show that the drop height is the most important factor affecting the acceleration of the hammer; and the larger peak impact force can be obtained by reducing the weight of the hammer but increasing the drop height. The acceleration increases with the increase of the plate modulus.