<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Forging hammers are machines whose operation causes negative effects both at the place of their foundation (the soil settlement) and in their surroundings (e.g., vibrations propagating to the other devices, noise, etc.). Knowledge of the parameters characterizing the time history of the force that arises as a result of impact of a ram on a shaped material is of fundamental importance for the correct analysis of both the structure of the hammer and its impact on the surroundings. In the paper, the effect of the shape and duration of a pulse load on the dynamic response of a hammer-foundation forging system was assessed. An analytical method of description of the forces that arise as a result of impact of the ram on the forged material, using different forms of pulses was presented. The forces defined in this way as loads in a mathematical model of three degrees of freedom forging system were used. The equations of motion derived from d’Alembert’s principle were solved numerically in the Matlab program. The analyses for eight forms of the pulse loads with the same pulse sizes but different durations were performed. The results in the graphs were presented. It was found, among other things, that a greater impact on the maximum displacement, velocity and acceleration of each component of the hammer-foundation system as well as on the maximum forces transmitted to the soil has the duration of a pulse than its shape.</p></abstract>

Forging hammers are machines whose operation causes negative effects both at the place of their foundation (the soil settlement) and in their surroundings (e.g., vibrations propagating to the other devices, noise, etc.). Knowledge of the parameters characterizing the time history of the force that arises as a result of impact of a ram on a shaped material is of fundamental importance for the correct analysis of both the structure of the hammer and its impact on the surroundings. In the paper, the effect of the shape and duration of a pulse load on the dynamic response of a hammer-foundation forging system was assessed. An analytical method of description of the forces that arise as a result of impact of the ram on the forged material, using different forms of pulses was presented. The forces defined in this way as loads in a mathematical model of three degrees of freedom forging system were used. The equations of motion derived from d’Alembert’s principle were solved numerically in the Matlab program. The analyses for eight forms of the pulse loads with the same pulse sizes but different durations were performed. The results in the graphs were presented. It was found, among other things, that a greater impact on the maximum displacement, velocity and acceleration of each component of the hammer-foundation system as well as on the maximum forces transmitted to the soil has the duration of a pulse than its shape.

Effect of Pulse Shape and Duration on Dynamic Response of a Forging System

Faculty of Mechanical Engineering and Computer Science, Department of Engineering Fundamentals

Acta Mechanica et Automatica

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

{"article-title":"Effect of Pulse Shape and Duration on Dynamic Response of a Forging System"}

Forging hammers are machines whose operation causes negative effects both at the place of their foundation (the soil settlement) and in their surroundings...

Effect of Pulse Shape and Duration on Dynamic Response of a Forging System

Published Online: Jan 30, 2020

Page range: 226 - 232

Received: Jun 26, 2018

Accepted: Dec 10, 2019

DOI: https://doi.org/10.2478/ama-2019-0030

Keywords
Dynamic response, impact load, pulse shape, pulse duration, forging hammer

© 2019 Arkadiusz Trąbka, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Effect of Pulse Shape and Duration on Dynamic Response of a Forging System

Published Online: Jan 30, 2020

Page range: 226 - 232

Received: Jun 26, 2018

Accepted: Dec 10, 2019

DOI: https://doi.org/10.2478/ama-2019-0030

KeywordsDynamic response, impact load, pulse shape, pulse duration, forging hammer

© 2019 Arkadiusz Trąbka, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
Dynamic response, impact load, pulse shape, pulse duration, forging hammer