A platform for research: civil engineering, architecture and urbanism
Dynamic modeling and optimal design of Tube–Diaphragm coupling beam inspired by bamboo
Abstract Organisms in nature can inspire human research and design. Bamboo is generally acknowledged to be the structure with the best specific energy absorption and specific stiffness in nature. Compared to trees, it is difficult to break bamboo at its root and cause it to fall under dynamic loads, which can provide a useful reference for researchers. In this paper, a tube–diaphragm coupling beam inspired by bamboo was designed. The dynamic model of the bending vibrations of was established for the first time, and the influences of the structural parameters, such as the number of diaphragms, the tube thickness, and the impact pulse width on the impact characteristics of the tube–diaphragm coupling beams under transverse impact forces were analyzed. An optimal design of the tube–diaphragm coupling beams was obtained by particle swarm optimization. Specimens of bionic, solid, and hollow beams were prepared by the SLA (stereo lithography apparatus) 3D printing technology, and impact tests were carried out. The results of impact tests showed that the base vibrations of the solid and hollow beams were greater than those of the tube–diaphragm coupling beam for different impact pulse widths. The results indicated that bamboo can change its natural frequencies by adjusting the number of diaphragms and the tube thickness to adapt to changes of the environment. This adjustment can make the tube–diaphragm coupling beam absorb more energy through deformation, and thus, the dynamic force of the tube–diaphragm coupling beam at its root was smaller than those of solid and hollow beams. The results reveal the mechanism that allows bamboo to be difficult to beak at the root and fall, which can provide a useful reference for the design of beams and rotors.
Highlights A tube-diaphragm coupling beam is designed. The dynamic model of a tube-diaphragm coupling beam is established. The impact characteristics of a tube-diaphragm coupling beam are analyzed. Optimal design of bionic bamboo is carried out by PSO. The mechanism of bamboo not easy to break at its root is revealed from dynamics.
Dynamic modeling and optimal design of Tube–Diaphragm coupling beam inspired by bamboo
Abstract Organisms in nature can inspire human research and design. Bamboo is generally acknowledged to be the structure with the best specific energy absorption and specific stiffness in nature. Compared to trees, it is difficult to break bamboo at its root and cause it to fall under dynamic loads, which can provide a useful reference for researchers. In this paper, a tube–diaphragm coupling beam inspired by bamboo was designed. The dynamic model of the bending vibrations of was established for the first time, and the influences of the structural parameters, such as the number of diaphragms, the tube thickness, and the impact pulse width on the impact characteristics of the tube–diaphragm coupling beams under transverse impact forces were analyzed. An optimal design of the tube–diaphragm coupling beams was obtained by particle swarm optimization. Specimens of bionic, solid, and hollow beams were prepared by the SLA (stereo lithography apparatus) 3D printing technology, and impact tests were carried out. The results of impact tests showed that the base vibrations of the solid and hollow beams were greater than those of the tube–diaphragm coupling beam for different impact pulse widths. The results indicated that bamboo can change its natural frequencies by adjusting the number of diaphragms and the tube thickness to adapt to changes of the environment. This adjustment can make the tube–diaphragm coupling beam absorb more energy through deformation, and thus, the dynamic force of the tube–diaphragm coupling beam at its root was smaller than those of solid and hollow beams. The results reveal the mechanism that allows bamboo to be difficult to beak at the root and fall, which can provide a useful reference for the design of beams and rotors.
Highlights A tube-diaphragm coupling beam is designed. The dynamic model of a tube-diaphragm coupling beam is established. The impact characteristics of a tube-diaphragm coupling beam are analyzed. Optimal design of bionic bamboo is carried out by PSO. The mechanism of bamboo not easy to break at its root is revealed from dynamics.
Dynamic modeling and optimal design of Tube–Diaphragm coupling beam inspired by bamboo
Zhang, Taochuan (author) / Duan, Chunmei (author) / Wang, Ailun (author) / Wang, Qingshan (author)
Thin-Walled Structures ; 155
2020-05-09
Article (Journal)
Electronic Resource
English
Bionics , Bamboo , Beam , Dynamics , Impact vibration , Optimal design
Bio-inspired Design with Bamboo
Bentham Science Publishers | 2019
|Reinforced bamboo tube plane truss and bamboo tube three-dimensional truss
European Patent Office | 2021
|REINFORCED BAMBOO TUBE PLANAR TRUSS AND BAMBOO TUBE THREE-DIMENSIONAL TRUSS
European Patent Office | 2022
|