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JTCAM
[Journal of Theoretical, Computational and Applied Mechanics]
JTCAM
Journal of Theoretical, Computational and Applied Mechanics
Established in 2021, Journal of Theoretical, Computational and Applied Mechanics (JTCAM) welcomes research in English in the field of solid mechanics and mechanics of materials and structures. The journal publishes theoretical, numerical, applied and experimental research contributions on an ongoing basis.
- Director of publication: Bruno Sportisse
- Editorial Board: Laurence Brassart ; Shaocheng Ji ; Anna Pandolfi ; Alexander Popp ; Julien Réthoré ; Olivier Thomas ; Laszlo S. Toth
- Medium: electronic
- Frequency: continuous
- Date created: 2021
- Date of publication on Episciences: 2021
- eISSN: 2726-6141
- Subjects: Theoretical, Computational and Applied Mechanics
- Language of publication: English
- Review process: single blind or open peer review
- CC BY 4.0 licence
- Publisher: Inria
- Address: Domaine de Voluceau Rocquencourt, BP 105, 78153 Le Chesnay Cedex
- Country: France
- Contact: jtcam AT episciences.org
See website
Established in 2021, Journal of Theoretical, Computational and Applied Mechanics (JTCAM) welcomes research in English in the field of solid mechanics and mechanics of materials and structures. The journal publishes theoretical, numerical, applied and experimental research contributions on an ongoing basis.
- Director of publication: Bruno Sportisse
- Editorial Board: Laurence Brassart ; Shaocheng Ji ; Anna Pandolfi ; Alexander Popp ; Julien Réthoré ; Olivier Thomas ; Laszlo S. Toth
- Medium: electronic
- Frequency: continuous
- Date created: 2021
- Date of publication on Episciences: 2021
- eISSN: 2726-6141
- Subjects: Theoretical, Computational and Applied Mechanics
- Language of publication: English
- Review process: single blind or open peer review
- CC BY 4.0 licence
- Publisher: Inria
- Address: Domaine de Voluceau Rocquencourt, BP 105, 78153 Le Chesnay Cedex
- Country: France
- Contact: jtcam AT episciences.org
Latest articles
Optimization of a dynamic absorber with nonlinear stiffness and damping for the vibration control of a floating offshore wind turbine toy model
Passive vibration mitigation of offshore wind turbines using nonlinear absorbers or nonlinear energy sinks has started to receive attention in the literature. In most cases, little attention has been paid to the possibility of detached resonances that occur when the nonlinear energy sink is attached to the linear system describing the wind turbine. Sea motions that alter the initial conditions of the floating offshore wind turbine may cause the nonlinear energy sink to operate at one or more detached resonances, completely negating its ability to control turbine vibration. In this paper, we are interested in optimizing the parameters of a nonlinear energy sink with nonlinear stiffness and nonlinear viscous damping for vibration control of a toy model (e.g., a linear mass-spring-damper system) of a floating offshore wind turbine over its entire operating range. The mechanism of cancellation of the detached resonance is studied analytically under 1:1 resonance. It is shown that the nonlinear energy sink with properly tuned nonlinear viscous damping allows the complete elimination of undesired regimes and completely restores the absorber's ability to strongly limit the vibration of a floating offshore wind turbine over its entire forcing range. The results obtained over a wide range of parameters suggest that both the optimal nonlinear energy sink parameters (linear and nonlinear stiffness and nonlinear damping) and the damping of floating offshore wind turbine vibration depend on simple power laws of nonlinear energy sink mass and linear damping.
Mattei, Pierre-Olivier
May 11, 2023
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Mathematics of stable tensegrity structures
Tensegrity structures have been extensively studied over the last years due to their potential applications in modern engineering like metamaterials, deployable structures, planetary lander modules, etc. Many of the form-finding methods proposed continue to produce structures with one or more soft/swinging modes. These modes have been vividly highlighted and outlined as the grounds for these structures to be unsuitable as engineering structures. This work proposes a relationship between the number of rods and strings to satisfy the full-rank convexity criterion as a part of the form-finding process. Using the proposed form-finding process for the famous three-rod tensegrity, the work proposes an alternative three-rod ten-string that is stable. The work demonstrates that the stable tensegrities suitable for engineering are feasible and can be designed.
Harish, Ajay B.
May 05, 2023
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