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Projects / Programmes source: ARIS

Nonlinear dynamics of spatial frame structures with enforced kinematic compatibility for advanced industrial applications

Research activity

Code Science Field Subfield
2.05.03  Engineering sciences and technologies  Mechanics  Numerical modelling 

Code Science Field
T000  Technological sciences   

Code Science Field
2.03  Engineering and Technology  Mechanical engineering 
Keywords
flexible multibody system dynamics, vibrations, moving contacts, numerical methods, geometrical and material nonlinearity, validation
Evaluation (rules)
source: COBISS
Researchers (11)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  35411  PhD Andrej Anžlin  Civil engineering  Researcher  2017 - 2020  135 
2.  35407  PhD Boris Azinović  Civil engineering  Researcher  2019 - 2020  75 
3.  24339  PhD Matija Gams  Civil engineering  Researcher  2017 - 2020  204 
4.  24337  PhD Miha Kramar  Civil engineering  Researcher  2017 - 2019  73 
5.  27532  PhD Maja Kreslin  Civil engineering  Researcher  2018 - 2020  162 
6.  24096  PhD Tomaž Pazlar  Civil engineering  Researcher  2019 - 2020  120 
7.  14507  PhD Igor Planinc  Civil engineering  Head  2017 - 2020  379 
8.  28380  PhD Urban Rodman  Civil engineering  Researcher  2018 - 2020  23 
9.  08437  PhD Goran Turk  Civil engineering  Researcher  2017 - 2020  524 
10.  19121  PhD Dejan Zupan  Civil engineering  Researcher  2017 - 2020  240 
11.  27673  PhD Eva Zupan  Mechanics  Researcher  2017 - 2020  56 
Organisations (2)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0792  University of Ljubljana, Faculty of Civil and Geodetic Engineering  Ljubljana  1626981  25,721 
2.  1502  Slovenian National Building and Civil Engineering Institute  Ljubljana  5866324000  10,454 
Abstract
The application of the most modern scientific results in industry is despite their applicative value only very limited. Important reasons for that are the additional effort needed for practical implementations and the necessity for the careful validation of proposed methods and the calibration of parameters. For practical applicability there is a need for computationally highly efficient numerical models, which are still able to predict realistic behaviour of the structure.   During the project, we will develop numerical methods, algorithms, and computer software for dynamics of flexible multibody systems in various advanced engineering applications. The engineering applications under consideration stem from our cooperation and cooperation of our partners with industry. We are focused on problems, in which the flexible bodies can be successfully modelled with geometrically exact Cosserat rods, such as cables, ropes, wires, belts, trusses, columns and girders. The nonlinear constitutive models and composite structure of this important engineering objects will be taken into account. A special attention will be given to modelling of coupled behaviour of moving bodies on deformable body. Our work will be based on wide knowledge and experiences of project group members in nonlinear beam theories and time integrators in multibody dynamics. The validity of proposed methods and methodology will be tested through several sets of experimental work.   We will prepare advanced computer software for accurate, efficient and robust dynamic analysis of flexible slender structures with realistic description of material and geometrical nonlinearites. With such numerical tools we will be able of better prediction of material changes and possible damage of the structure. The efficiency of the mode in high-frequency range will also allow better reduction of unpleasant acoustic disturbances in virtual product development process.   Together with the development of numerical methods the experimental work will be carried out. In our experimental analysis modern equipment will be used including laser vibrometers, accelerometers, strain gauges and optical imagery system that allow measurements with high sampling rates. The measured data will ensure the detailed information on the dynamic response of the system under laboratory and realistic conditions and will provide an excellent basis for the validation of numerical models.
Significance for science
The development, improvement, and validation of numerical methods for flexible multibody dynamics is a subject of extensive research, which is confirmed by a number of recent papers. The international research projects with similar goals are also indicative that the research in this area is necessary. With the proposed research we intend to achieve a better understanding of the dynamic response of flexible multibody systems under large overall motion with realistic predictions of axial extension, shear, bending, torsion and the coupling of these phenomena.  The validation of developed numerical models through experimental work will increase the applicative value of our results. The rapid development in the fields of flexible multibody dynamics arose the need for more precise verification and validation of methods. The goals of the project are thus in complete accord with the international trends. Understanding and predicting the behaviour of slender structures in severe non-linear time-dependent load conditions together with weakening of material is of utmost importance for reliability and durability of existing and future engineering structures and industrial products. Better and more reliable numerical models allow us to estimate the changes in structure from actual structural dynamic response and therefore the prevention of failures of structural elements or the collapse of the whole structure. Since dynamic response of the structure is often related to noise, better numerical models lead also to easier development of industrial product that have improved acoustic noise properties.
Significance for the country
As it is pointed out in the Resolution for the national research and innovation strategy 2011-2020, it is a priority to use research resources to assist economy. Since this is one of the main goals of the proposed research, we feel that this condition is fully satisfied. The proposed research is of important relevance for advanced industrial applications, where the dynamic effects on flexible bodies take an important role in the response of the system. Increasing demands for safer, more reliable solutions and comfort, especially for low level of noise, are in many filed of application possible only with sufficient knowledge of multibody system dynamics and the use of sophisticated numerical tools. Project is relevant of increasing the knowledge and availability of numerical methods for multibody dynamics for many advanced industrial applications and their further development. As the project is strongly related to many different fields of research interdisciplinary collaborations are expected. As a direct result of this project an advanced original software for accurate, efficient and robust dynamic analysis of flexible slender structures considering material and geometrical non-linearity will be prepared. Such software would represent an advantage in virtual product development of industrial product and critical reassessment of existing engineering structures.
Most important scientific results Interim report, final report
Most important socioeconomically and culturally relevant results Interim report, final report
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