Examination of vibration of the wooden beams under load

Present paper concerns the problem of vibration of the wooden beams under load. Effect of the tensile, compressive and bending stresses on the vibration damping of pine-wood, spruce-wood and hornbeam-wood beams have been investigated. Also, there has been experimentally confirmed the relationships, known in the theory, between the tensile and compressive forces and the natural frequency of the beams loaded by those forces.