Projects / Programmes
Vibrational fatigue in automotive industry
Code |
Science |
Field |
Subfield |
2.11.00 |
Engineering sciences and technologies |
Mechanical design |
|
Code |
Science |
Field |
T210 |
Technological sciences |
Mechanical engineering, hydraulics, vacuum technology, vibration and acoustic engineering |
Code |
Science |
Field |
2.03 |
Engineering and Technology |
Mechanical engineering |
vibrations, vibrational fatigue, structural dynamics, automotive industry
Researchers (14)
Organisations (3)
Abstract
The automotive industry is one of the most innovative, competitive and high-volume industries. In Slovenia, industrial suppliers of the automotive industry represent about 10% of GDP and about 20% of exports, and has an average value added between 40 to 50 thousand EUR per employee (source: Automotive Cluster of Slovenia) . There are estimates that the Slovenian automotive industry will double the volume in the next five years and thereby contribute significantly to the improvement of the socio- economic situation in the country.
An important contribution to this success will be due to the innovative research that will lead to the greater competitive advantage and higher added value.
Since most products in the automotive industry are dynamically loaded, these products are exposed to vibration-fatigue. The dynamic excitation sources are for example: the engine (periodic and broad-band excitation), the road (broad-band excitation). Established approach to the vibration fatigue either focus to the structural dynamics or to the classical dynamic fatigue. In recent years, the field of structural dynamics is being extended with the frequency domain approaches of the classical fatigue theory. With this extensions the theoretical, numerical and experimental effort increases significantly, but the much more insight into the background of the vibration fatigue is possible. With the quantitative life-time estimation new possibilities of structural optimization opened up. Being in the forefront of the very promising research, this will open up new possibilities and consequently the competitive advantages of Slovenian manufacturers of automotive parts.
In the last 5 years, the Laboratory for Dynamics of Machines and Structures, contributed significantly to the development of science in the field of vibration fatigue. In particular:
· The theoretical and experimental research of different frequency-domain vibration fatigue estimation methods,
· the development of methods for real-time identification of fatigue and structural parameters,
· the development of the numerical and theoretical approach to the structural modification in the case of kinematic base excitation.
The goals of the proposed project are:
1. Extend the current state of art of the multi-axial vibration loads.
2. Develop new optimization methods based on vibration-fatigue.
3. Perform at least one real-product optimization.
The results of the proposed project would directly benefit the industrial partners and result in directly result in a competitive advantage. The results of the proposed project would directly and indirectly benefit other industry of automotive suppliers in Slovenia and help to achieve greater innovation, added value and volume of production.
Significance for science
The scientific project contributed to the development of science through 9 scientific articles, 6 of which were published in A1 (A ', A1 / 2) journals: In the scientific article published with Mechanical Systems and Signal Processing (MRŠNIK, M, SLAVIČ, J, BOLTEŽAR, M, 2016), a comprehensive theoretical and experimental overview of multi-axial loads in vibration fatigue was presented. The article published in the International Journal of Mechanical Sciences (PROSO, U, SLAVIČ, J, BOLTEŽAR, M., 2016) presents one of the first studies of the influence of nonlinearities on vibration fatigue damage (and also proposes a method to take the nonlinearities into account in the vibration fatigue damage identification). In the article presented in Mechanical Systems and Signal Processing (MRŠNIK, M, SLAVIČ, J, BOLTEŽAR, M, 2018), a new approach to determining the vibration fatigue damage based on the modal decomposition was presented. The three papers published in the International Journal of Fatigue (PALMIERI et al., 2017, CAPPONI et al., 2017) have significantly contributed to the understanding and control of nonstationarity in non-Gaussian vibration loads in vibration fatigue. Above articles have received more than 40 citation on Google Scholar (despite the relatively short time since publication to date).
Significance for the country
In addition to the scientific impact, this project has an important socio-economic impact. The project included doctoral researchers who are now involved in the research and development activities of the relevant Slovenian export industry. This project significantly contributed to the developed of competences in the field of vibration fatigue.
Most important scientific results
Annual report
2014,
2015,
final report
Most important socioeconomically and culturally relevant results
Annual report
2014,
2015,
final report