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1. Harnessing energy from suspension systems of oceanic vehicles with high-performance piezoelectric generators

Author:
Li, Zhongjie; Peng, Yan; Xu, Zhibing; Peng, Jinlin; Xin, Liming; Wang, Min; Luo, Jun; Xie, Shaorong; Pu, Huayan
Source:
Energy 2021 v.228 pp. 120523
ISSN:
0360-5442
Subject:
vibration,   etc   ; capacitance; energy;     Show all 3 Subjects
Abstract:
... In this paper, we originally propose an array of piezoelectric generators harnessing energy from suspension systems of oceanic vehicles based on piezoelectric stacks. The design mainly includes base and load platforms, six single vibration suppression units which contain piezoelectric units, flexible joints, springs, and force amplifiers. The piezoelectric stacks harvest energy dissipated into the ...
DOI:
10.1016/j.energy.2021.120523

2. Dairy powder breakage: Mechanisms, characterization methods, impacted properties and influencing factors

Author:
Han, Jie; Fitzpatrick, John; Cronin, Kevin; Miao, Song
Source:
Trends in food science & technology 2021 v.114 pp. 608-624
ISSN:
0924-2244
Subject:
vibration,   etc   ; food science; rehydration;     Show all 3 Subjects
Abstract:
... Particle breakage deteriorates dairy powder properties and it easily takes place in many processes. However, there currently is a lack of research on dairy powder breakage for understanding and controlling it. The research on particle breakage in other industries is very extensive and thorough, and could act as good reference knowledge for dairy powder breakage research, but at this time there is ...
DOI:
10.1016/j.tifs.2021.05.043

3. Effects of side ratio on energy harvesting from transverse galloping of a rectangular cylinder

Author:
Yu, Haiyan; Zhang, Mingjie
Source:
Energy 2021 v.226 pp. 120420
ISSN:
0360-5442
Subject:
vibration,   etc   ; aerodynamics; energy; models;     Show all 4 Subjects
Abstract:
... Rectangular cylinders have been identified as ideal bluff bodies for galloping-based energy harvesting, while a systematic study of the effects of the side ratio (i.e., the ratio between the cylinder width and the cylinder height) remains unavailable. This study investigates the influences of the side ratio on the piezoelectric energy harvesting from the transverse galloping of a rectangular cylin ...
DOI:
10.1016/j.energy.2021.120420

4. Infrared spectroscopy of graphene nanoribbons and aromatic compounds with sp3C–H (methyl or methylene groups)

Author:
Kanazawa, Shuhei; Yamada, Yasuhiro; Sato, Satoshi
Source:
Journal of materials science 2021 v.56 no.21 pp. 12285-12314
ISSN:
0022-2461
Subject:
vibration,   etc   ; graphene; infrared spectroscopy;     Show all 3 Subjects
Abstract:
... Graphene nanoribbon (GNR) has attracted attention because of the adjustable band gap, depending on the width and functional groups. The introduction of sp³C–H on edges is one of the choices to reduce the agglomeration between GNRs and to change their various properties. Infrared spectroscopy is among the powerful tools to analyze the edge structures of carbon materials, but the number of detailed ...
DOI:
10.1007/s10853-021-06001-1

5. Mid-Infrared Photodetection of Type-II Dirac Semimetal 1T-PtTe₂ Grown by Molecular Beam Epitaxy

Author:
Wei, Tianyao; Wang, Ximiao; Yang, Qi; He, Zhihao; Yu, Peng; Xie, Zhuang; Chen, Huanjun; Li, Shuwei; Wu, Shuxiang
Source:
ACS applied materials & interfaces 2021 v.13 no.19 pp. 22757-22764
ISSN:
1944-8252
Subject:
vibration,   etc   ; air; anisotropy; metalloids;     Show all 4 Subjects
Abstract:
... Mid-infrared (MIR) photodetection is of significance in civil and military applications because it shows superiority in absorbing the vibration of various molecules and covering atmospheric transmission windows. Recently, the PtTe₂, a typical type-II Dirac semimetal, has come under the spotlight due to its unique photodetection sensibility in the MIR region and robust stability in the atmosphere. ...
DOI:
10.1021/acsami.1c04598

6. Simultaneous Time-Varying Vibration and Nonlinearity Compensation for One-Period Triangular-FMCW Lidar Signal

Author:
Wang, Rongrong; Wang, Bingnan; Xiang, Maosheng; Li, Chuang; Wang, Shuai; Song, Chong
Source:
Remote Sensing 2021 v.13 no.9
ISSN:
2072-4292
Subject:
vibration,   etc   ; lidar; models;     Show all 3 Subjects
Abstract:
... Frequency modulation continuous wave (FMCW) Lidar inevitably suffers from vibration and nonlinear frequency modulation, which influences the ranging and imaging results. In this paper, we analyze the impact of vibration error coupled with nonlinearity error on ranging for FMCW Lidar, and propose a purely theoretical approach that simultaneously compensates for time-varying vibration and nonlineari ...
DOI:
10.3390/rs13091731

7. Vibration attenuation of finite-size metaconcrete: Mechanism, prediction and verification

Author:
Liu, Yang; An, Xiyue; Chen, Hailong; Fan, Hualin
Source:
Composites 2021 v.143 pp. 106294
ISSN:
1359-835X
Subject:
vibration,   etc   ; energy; prediction; rubber;     Show all 4 Subjects
Abstract:
... To mitigate shock and vibration, metaconcrete with single-mass-coating resonators and double-mass-coating resonators was designed based on local resonance mechanism. The resonator is constructed by metallic ball coated with thin and soft rubber layer. Dynamic analysis method for finite-size metaconcrete is developed to predict the effective bands for vibration attenuation, which is verified by fre ...
DOI:
10.1016/j.compositesa.2021.106294

8. Postural performance and plantar cutaneous vibration perception in patients with idiopathic normal pressure hydrocephalus

Author:
Heß, Tobias; Milani, Thomas L.; Meixensberger, Jürgen; Krause, Matthias
Source:
Heliyon 2021 v.7 no.1 pp. e05811
ISSN:
2405-8440
Subject:
vibration,   etc   ; hydrocephalus; therapeutics;     Show all 3 Subjects
Abstract:
... To investigate whether impaired plantar cutaneous vibration perception contributes to postural disturbance in idiopathic normal pressure hydrocephalus (iNPH).Three different groups were tested: iNPH-patients (iNPH), iNPH-patients after surgical shunt therapy (iNPH shunt), and healthy subjects (HS). Postural performance was quantified during quiescent stance on a pressure distribution platform. Vib ...
DOI:
10.1016/j.heliyon.2020.e05811

9. A quasi-zero-stiffness device capable of vibration isolation and energy harvesting using piezoelectric buckled beams

Author:
Liu, Chaoran; Zhao, Rui; Yu, Kaiping; Lee, Heow Pueh; Liao, Baopeng
Source:
Energy 2021 v.233 pp. 121146
ISSN:
0360-5442
Subject:
vibration,   etc   ; electric power; energy; spring;     Show all 4 Subjects
Abstract:
... A quasi-zero-stiffness (QZS) device is proposed for both vibration isolation and energy harvesting based on a concept of converting part of the vibrational energy into electrical energy and concurrently reducing the energy transmitted to the vibration receiver. The proposed device is constructed by four piezoelectric buckled beams and a vertical spring. The structural layout of the piezoelectric b ...
DOI:
10.1016/j.energy.2021.121146

10. Hydraulic interaction of two parallel pump-turbines in constant-speed oscillation: Measurement, simulation, and sensitivity analysis

Author:
Hu, Jinhong; Yang, Jiebin; Zeng, Wei; Zhao, Zhigao; Yang, Jiandong
Source:
Renewable energy 2021 v.176 pp. 269-279
ISSN:
0960-1481
Subject:
vibration,   etc   ; renewable energy sources; risk;     Show all 3 Subjects
Abstract:
... The S-shaped characteristic of a pump-turbine poses a latent risk to problems such as failure to start the unit, excessive water hammer pressure after load rejection, severe pressure pulsation, and intense vibration. However, S-shaped characteristics of a pump-turbine are usually investigated by static model tests, while the scope of this method is relatively limited. In a previous study exploring ...
DOI:
10.1016/j.renene.2021.05.081

11. Effect of specimen configuration and orthotropy on the Young’s modulus of solid wood obtained from a longitudinal vibration test

Author:
Yoshihara, Hiroshi; Maruta, Makoto
Source:
Holzforschung 2021 v.75 no.5 pp. 428-435
ISSN:
1437-434X
Subject:
vibration,   etc   ; finite element analysis; wood;     Show all 3 Subjects
Abstract:
... Young’s modulus in the longitudinal direction was measured by a longitudinal vibration (LV) test on western hemlock specimens with various length/width ratios. The effects of the configuration and orthotropy of the specimen on the measurement of Young’s modulus was investigated through subsequent finite element (FE) calculations. The experimental results suggested that Young’s modulus could not be ...
DOI:
10.1515/hf-2020-0115

12. Enhancing the Free Vibration Characteristics of Epoxy Polymers Using Sustainable Phoenix Sp. Fibers and Nano-Clay for Machine Tool Applications

Author:
Kumar, G. Rajesh; Hariharan, V.; Saravanakumar, S. S.
Source:
Journal of natural fibers 2021 v.18 no.4 pp. 531-538
ISSN:
1544-046X
Subject:
vibration,   etc   ; chemical treatment; epoxides; polymers;     Show all 4 Subjects
Abstract:
... This study focuses on enhancing the free vibration characteristics of epoxy polymers by reinforcing it with Phoenix sp. fibers and nano-clay for the first time. The composites were prepared by varying the fiber length, fiber volume fraction, concentration of NaOH treatment, and weight percentage of nano-clay and subjected to modal analysis. The optimum fiber length and fiber volume fraction for be ...
DOI:
10.1080/15440478.2019.1636740

13. Improvement of vibration frequency and energy efficiency in the uniaxial electro-hydraulic shaking tables for sinusoidal vibration waveform

Author:
Wang, He; Chen, Zhen; Huang, Jiahai
Source:
Energy 2021 v.218 pp. 119477
ISSN:
0360-5442
Subject:
vibration,   etc   ; energy efficiency; mathematical models;     Show all 3 Subjects
Abstract:
... When the sinusoidal vibration waveform is required, the problems of low vibration frequency and low energy efficiency severely restrict the application of conventional uniaxial electro-hydraulic shaking tables (UEHSTs) individually controlled by a standard servo valve. To solve these problems, a novel UEHST jointly controlled by a rotary valve and a standard servo valve is designed in this paper. ...
DOI:
10.1016/j.energy.2020.119477

14. Studying the Effect of Balancer on Engine Vibration of Massey Ferguson 285 Tractor

Author:
Farrokhi Zanganeh, Niusha; Shahgholi, Gholamhossein; Agh, Soleiman
Source:
Acta technologica agriculturae 2021 v.24 no.1 pp. 14-19
ISSN:
1338-5267
Subject:
vibration,   etc   ; animal injuries; torque; tractors;     Show all 4 Subjects
Abstract:
... The mechanical vibration causes health issues to drivers, such as backache, spinal cord injury, etc. In this regard, a tractor engine plays important role. Tractors without chassis are equipped with a balancer unit reducing the secondary engine vibrating force and decreasing the engine and tractor vibration. The paper presented investigates the effects of balancer on secondary vibration. In this r ...
DOI:
10.2478/ata-2021-0003

15. Environmental noise and vibration characteristics of rubber-spring floating slab track

Author:
He, Wei; Zou, Chao; Pang, Yutao; Wang, Xiaomei
Source:
Environmental science and pollution research 2021 v.28 no.11 pp. 13671-13689
ISSN:
0944-1344
Subject:
vibration,   etc   ; pollution; railroads; research; uncertainty;     Show all 5 Subjects
Abstract:
... The floating slab track is considered one of the most effective track structures to reduce the adverse effects of underground railway noise and vibration. This paper reports a new type of rubber-spring float track (RSFS), which adopts a well-designed rubber-spring vibration isolator and is conceptually designed as a float track structure. The dynamic performance of different track structures, name ...
DOI:
10.1007/s11356-020-11627-w

16. Effects of dissimilar wakes on energy harvesting of Flow Induced Vibration (FIV) based converters with circular oscillator

Author:
Tamimi, V.; Wu, J.; Naeeni, S.T.O.; Shahvaghar-Asl, S.
Source:
Applied energy 2021 v.281 pp. 116092
ISSN:
0306-2619
Subject:
vibration,   etc   ; energy; entropy; hydroelectric power;     Show all 4 Subjects
Abstract:
... In recent times, transverse Flow Induced Vibration (FIV) has emerged as a promising technique for energy harvesting from fluid motion. However, relatively low harnessed power and efficiency remain as major challenges. Although several studies on hydrokinetic energy harvesting of circular oscillators at the wake of similar cylinders are reported in the literature, their performance under the influe ...
DOI:
10.1016/j.apenergy.2020.116092

17. An analytical method for shallow spherical shell free vibration on two-parameter foundation

Author:
Gan, Jiarong; Yuan, Hong; Li, Shanqing; Peng, Qifeng; Zhang, Huanliang
Source:
Heliyon 2021 v.7 no.1 pp. e05876
ISSN:
2405-8440
Subject:
vibration,   etc   ; analytical methods; differential equation;     Show all 3 Subjects
Abstract:
... The free vibration control differential equation of shallow spherical shell on two-parameter foundation is a four order differential equation. Using the intermediate variable, the four order differential equation is reduced to two lower order differential equations. The first lower order differential equation is a Helmholtz equation. A new method of two-dimensional Helmholtz operator is proposed a ...
DOI:
10.1016/j.heliyon.2020.e05876

18. Hanging by a thread: unusual nocturnal resting behaviour in a jumping spider

Author:
Rößler, Daniela C.; De Agrò, Massimo; Biundo, Elia; Shamble, Paul S.
Source:
Frontiers in zoology 2021 v.18 no.1 pp. 23
ISSN:
1742-9994
Subject:
vibration,   etc   ; Evarcha; philopatry; silk; spiders; vegetation; vision;     Show all 7 Subjects
Abstract:
... BACKGROUND: For diurnal animals that heavily rely on vision, a nocturnal resting strategy that offers protection when vision is compromised, is crucial. We found a population of a common European jumping spider (Evarcha arcuata) that rests at night by suspending themselves from a single silk thread attached overhead to the vegetation, a strategy categorically unlike typical retreat-based resting i ...
DOI:
10.1186/s12983-021-00410-3

19. Measuring density and Young’s modulus of a log through the vibration test without measuring its weight

Author:
Kubojima, Yoshitaka; Sonoda, Satomi; Kato, Hideo
Source:
Journal of wood science 2021 v.67 no.1 pp. 6
ISSN:
1435-0211
Subject:
vibration,   etc   ; Cryptomeria japonica; Picea sitchensis; wood;     Show all 4 Subjects
Abstract:
... This study examines a simple estimation method for the measurement of the mass of an on-site log through a vibration test. In this method, rather than the log itself, a cut end portion is weighed. For this purpose, the vibration method with additional mass (VAM) was applied to Sitka spruce (Picea sitchensis Carr.) circular truncated cones (model log) and Japanese cedar (Cryptomeria japonica D. Don ...
DOI:
10.1186/s10086-020-01929-5

20. Release of inhalable particles and viable microbes to the air during packaging peeling: Emission profiles and mechanisms

Author:
Han, Ruining; Yu, Chenglin; Tang, Xuening; Yu, Song; Song, Min; Shen, Fangxia; Fu, Pingqing; Hu, Wei; Du, Lin; Wang, Xinfeng; Herrmann, Hartmut; Wu, Yan
Source:
Environmental pollution 2021 v.285 pp. 117338
ISSN:
0269-7491
Subject:
vibration,   etc   ; air; community structure; human health; pollution;     Show all 5 Subjects
Abstract:
... Packaging is necessary for preserving and delivering products and has significant impacts on human health and the environment. Particle matter (PM) may be released from packages and transferred to the air during a typical peeling process, but little is known about this package-to-air migration route of particles. Here, we investigated the emission profiles of total and biological particles, and th ...
DOI:
10.1016/j.envpol.2021.117338