General definition of percussion and vibration

Percussion and vibration are mechanical phenomena related to the transmission of energy through impacts and oscillations in material media. Percussion refers to the action of hitting or colliding one body against another, generating a short-duration impulse, while vibration involves repetitive oscillatory movements around a balanced position. Both phenomena are present in various industrial and construction processes, influencing the integrity of structures and the comfort of users.

In the construction field, percussion and vibration can be both tools and risk factors. For example, percussion is used in demolition and piling techniques, while vibration can affect the stability of buildings and cause fatigue in materials. Understanding these phenomena is essential to design safe structures, optimize construction processes and mitigate environmental and social impacts.

Fundamentals of percussion

Percussion is a dynamic process that involves the transfer of kinetic energy through direct impact. In physical terms, it is characterized by a force that acts during a very short time interval, generating a sudden acceleration in the receiving body. The magnitude of the impulse depends on the mass and speed of the impacting object, as well as the properties of the impacted material, such as its stiffness and strength.

This phenomenon can be analyzed using elastic and inelastic shock models, where energy is partially conserved or dissipated in the form of heat, deformation or sound. Percussion is essential in construction techniques such as pile driving, where successive impacts allow structural elements to be introduced into the ground.

Vibration Basics

Vibration is defined as a periodic oscillatory movement around an equilibrium position. This movement can be free, damped or forced, depending on whether the vibration occurs due to an initial disturbance without external intervention, with energy dissipation or due to a continuous external force, respectively. Vibrations are described by parameters such as frequency, amplitude and phase, which determine their temporal behavior.