Design and Vibration Isolation Performance of Truss‐Type CFRP Raft Frame

Wen, Xianglong; Wen-hu, LI; Fang, Yuan; Song, Chunsheng; Zhang, Jinguang

doi:10.1155/2019/4281958

Cited by 9 publications

(6 citation statements)

References 21 publications

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“…where ζ is the structural damping ratio. The damping loss factor of the structure is converted into the damping ratio [6]:…”

Section: E1 (Gpa)mentioning

confidence: 99%

“…Their damping loss factor is 1-2 orders of magnitude higher than that of metal materials [4,5]. In recent year, CFRP has been applied to design raft frames, and already been used in a wide range of fields, including satellite, spaceship, and submarine manufacture [6,7]. According to these studies [8,9], it is fairly easy to appreciate that CFRP raft frames have already been adopted successfully to isolate vibrations.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the Damping Capacity of CFRP Raft Frames

Zhang

Rao

et al. 2022

Materials

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In this paper, based on the composite laminated plate theory and a strain energy model, the damping capacity of a Carbon Fiber Reinforced Plastics (CFRP) raft frame was studied. According to the finite element analysis (FEA) and damping ratio prediction model, the influences of different layups on the damping capacity of the raft frame and its components (top/bottom plate and I-support) were discussed. Comparing the FEA results with the test results, it can be figured out that the CFRP laminate layup has a great influence on the damping ratio of the raft frame, and the maximum error of the first-order natural frequency and damping ratio of the top/bottom plate were 5.6% and 15.1%, respectively. The maximum error of the first-order natural frequency of the I-support between the FEA result and the test result was 7.5%, suggesting that because of the stress concentration, the error of the damping ratio was relatively large. As for the raft frame, the damping performance was affected by the I-support arrangement and the simulation analysis was in good agreement with the experimental results. This study can provide a useful reference for improving the damping performance of CFRP raft frames.

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“…where ζ is the structural damping ratio. The damping loss factor of the structure is converted into the damping ratio [6]:…”

Section: E1 (Gpa)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of the Damping Capacity of CFRP Raft Frames

Zhang

Rao

et al. 2022

Materials

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“…In article [13], Xianglong Wen et al presented a platform designed for vibration damping, equipped with a truss-type raft frame (made of carbon fibre-reinforced plastic). A numerical model of the frame was created.…”

Section: Anti-vibration Platformsmentioning

confidence: 99%

Vibration damping of the anti-vibration platform intended for use in combination with audio/music devices

Breńkacz¹,

Bagiński²,

Korbicz³

2020

J. vibroeng.

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The article presents research on the damping properties of an anti-vibration platform (designed and manufactured by Stacore), which is intended for use in combination with high class audio devices. The platform comprises two parts that are capable of passive vibration damping. The design of this platform is unique and has been developed by applying several technical solutions in a combination not found on any other anti-vibration platform on the audio market. These solutions are described in the article. The first part of the platform is pneumatically operated and the second part uses ball bearings. The casing also fulfils the most important function – vibration damping. It is made of amorphous slate (known for its good vibration-damping properties) and includes a metal plate covered with a special visco-elastic layer that fulfils the role of binding material. The first part of the platform realises the pneumatic damping. It comprises four elastomer pneumatic springs, each with its own air tank. The air tanks are designed to operate at a maximum pressure of 5 bar. The second vibration-damping part of the platform is located above the first part (pneumatic) and consists of ball bearings, used for the isolation of transverse vibration, being relatively difficult to deal with pneumatic springs. The upper part consists of three bearings, each of which comprises of a polished, deep hardened steel racings and a ball made of tungsten carbide. The scientific literature describes many solutions enabling vibration damping, including many anti-vibration platforms. However, the literature lacks the descriptions of analyses conducted on anti-vibration platforms for audio devices. This article is a novelty in the literature as it concerns the experimental research aimed at verifying the vibration-damping capacity of the anti-vibration platform that can be used with audio devices owned by people who appreciate high-quality music. The article describes in detail the whole measurement procedure applied to the vibration damping platform. For research purposes, the anti-vibration platform was suspended on flexible ropes. At first, an electromagnetic vibration exciter was attached to the base on which the platform rested, and then the displacements of the upper and lower part of the platform were measured using laser sensors. Based on these signals, the vibration damping capability (transmissibility) of the platform was determined in two mutually perpendicular directions. In addition to the graph that shows the vibration damping capability of the anti-vibration platform, the signals of the applied force and displacements measured during the research are also presented in this article.

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“…24 A truss-type carbon fiber-reinforced plastic raft frame structure was developed based on the impact of the lattice truss structure's structural parameters. 25 The effect of print strength of the FDM AM printer was investigated to the vibration characteristics of lattice structure bars. 26 Žugic ́et al performed free vibration analysis of spatial frames made up of 3D beam components using the consistent mass matrix, which is incorporated in the ALIN and TOWER codes.…”

Section: Introductionmentioning

confidence: 99%

Modal analysis of a lattice type metamaterial by modeling cell structures using Euler–Bernoulli beams

Ercan,

Karacay

2023

Proceedings of the Institution of Mechanical Engineers, Part L:

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Metamaterials have superior properties compared to materials found in nature and allow the tailoring of static and dynamic characteristics of the cell structures. In this study, the vibration characteristics of the sandwich plate systems composed of lattice beam structures are investigated and their behavior under various loading conditions is determined. In this context, a matrix-based solution method is developed to calculate the natural frequencies of the structure by assuming lattice elements as individual Euler–Bernoulli beams. The same structures are also analyzed with a commercial finite-element solver (ANSYS) to compare the results. In order to verify the results and determine the applicability of the proposed approach, an experimental study is conducted. Unit cell structures are additively manufactured with Stereolithography (SLA) and experimental modal analysis is performed using impact testing. Also, the amount of deflections on the structures under various loading conditions is determined experimentally by performing three-point bending tests on the plates. It has been concluded that approximate vibration characteristics of lattice-type metamaterial structures with various unit cell geometries can be determined in a short time by utilizing the matrix-based method without the need for any commercial software or performing complex experiments.

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Design and Vibration Isolation Performance of Truss‐Type CFRP Raft Frame

Cited by 9 publications

References 21 publications

Investigation of the Damping Capacity of CFRP Raft Frames

Investigation of the Damping Capacity of CFRP Raft Frames

Vibration damping of the anti-vibration platform intended for use in combination with audio/music devices

Modal analysis of a lattice type metamaterial by modeling cell structures using Euler–Bernoulli beams

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