Article
Thermodynamics
Tanathep Leungtongkum, Onrawee Laguerre, Steven Duret, Denis Flick
Summary: This article discusses the capabilities and limitations of three validated models (lumped, zonal, and CFD) in solving technical issues related to food transport in an insulated box with a PCM. The lumped model is suitable for investigating the effect of box design and operating conditions where temperature heterogeneity is not the main concern. The zonal model depicts spatial temperature variations but requires certain assumptions specific to the product arrangement and PCM location. The CFD model provides the most detailed information on physical phenomena and temperature variations but has a high computational cost.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Guofu Ren, Tao Lai, Zhiguo Qu, Xueliang Wang, Guobin Zhang
Summary: In this study, a reverse-gradient gas diffusion layer (GDL) is fabricated using the electrospinning method to improve the performance of proton exchange membrane fuel cell (PEMFC) systems under nonhumidification conditions. The experimental results show that the reverse-gradient GDL can retain more water and provide a higher power density under low-humidity conditions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Jingtan Chen, Dan Shi, Shahid Ali Khan, Kejian Dong, Abd Allah A. Mousa, Jiyun Zhao
Summary: The rising heat dissipation demand on electronic devices has prompted the need for more efficient and energy-saving cooling strategies. Multichannel flow boiling offers a solution by utilizing the latent energy of vapor, preventing heat accumulation. However, to optimize multichannel design, we must also consider pressure drop minimization and flow instability mitigation. In this study, a Lattice Boltzmann Method is used to investigate the effects of various factors on the overall performance of multichannel flow boiling. The findings provide valuable insights for the design of multichannel heat sinks and shed light on the mechanisms of flow boiling enhancement.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Ashreet Mishra, Prashant Singh, Like Li
Summary: This study presents a continuum heat transfer model to investigate the heat transfer enhancement in MPBHXs with the presence of high-porosity metal foams. The results show that metal foams can enhance the heat transfer in MPBHXs.
APPLIED THERMAL ENGINEERING
(2024)
Article
Acoustics
Jinhong Noh, Pilkee Kim, Yong-Jin Yoon
Summary: This study reveals the competitive advantages of a bistable vibration isolator over conventional linear and monostable ones, including a wider vibration isolation bandwidth and enhanced operational safety.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Dong Shao, Yilun Zhang, Yongqiang Tao, Yonghui Zhao, Yuan Cao
Summary: This paper presents a semi-analytical method and experiments to investigate the free vibration characteristics of closed-coupled plates with arbitrary spatial coupling angles and curved edges. By combining different boundary and spatial coupling connection conditions, semi-analytical solution formulas for the entire vibration model are established. The accuracy and applicability of the method are verified through experimental tests, comparisons with other research results, and finite element method simulations. Furthermore, the effects of spatial geometric parameters on the free vibration characteristics of closed-coupled plates with curved edges are thoroughly studied.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Shahram Hadian Jazi, Mostafa Hadian, Keivan Torabi
Summary: Non-uniformity and damage are the main focus in studying vibrations of beam elements. An exact closed-form explicit solution for the transverse displacement of a nonuniform multi-cracked beam is introduced using generalized functions and distributional derivative concepts. By introducing non-dimensional parameters, the motion equation and its closed-form solution are obtained based on four fundamental functions. The impact of crack count, location, intensity, and boundary conditions on natural frequency and mode shape is evaluated through numerical study.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Jialin Su, Hongwei Chen, Dong Yang
Summary: This paper investigates the acoustic inertia of inclined circular apertures in a finite-thickness plate. A hybrid method combining modal expansion and boundary element method is used for calculation and analysis. The results obtained from simulations of different inclination angles and arrangement patterns provide representative findings. The effectiveness of the proposed method is verified through validation experiments and comparison with Computational Fluid Dynamics simulations.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Guanfu Lin, Zhong-Rong Lu, Jike Liu, Li Wang
Summary: Vision-based measurement is an emerging method that enables full-field measurement with non-contact and high spatial resolution capabilities. This paper presents a single-camera method for measuring out-of-plane vibration of plate structures using motion-parametric homography to capture image variation and displacement response.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Wai Yeen Yeang, Dunant Halim, Xiaosu Yi, Hao Chen
Summary: This study aims to broaden the absorption bandwidth and improve low frequency sound absorption of a microperforated panel (MPP) by investigating the effects of tuned multi-frequency resonators attached to a flexible panel. The research shows that the placement, quantity, and configuration of the resonators significantly influence the sound absorption characteristics. Circular arrangement of multiresonators helps achieve a more uniform sound absorption coefficient. Experimental results demonstrate that using circularly-arranged multi-frequency resonators with a 2% mass ratio as the backing can achieve wide low-frequency half-bandwidth and improved absorption coefficient.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Ce Zhang, Wei Ma
Summary: This paper firstly derived a frequency-domain expression of sound pressure field radiated by monopole source with general moving trajectory, and verified its accuracy through theoretical and numerical verification. This expression can be applied to localize a rotating source with time-variant rotation speed using the mode composition beamforming method.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Wojciech P. Rdzanek, Augustus J. E. M. Janssen, Krzysztof Szemela, Marek Pawelczyk
Summary: This study rigorously addresses the Neumann-Robin problem of sound radiation from a vibrating flexible disk embedded into a hemispherical enclosure. The presented solution is applicable to any vibration velocity profile on the radiator, and the results can be valuable for modeling vibroacoustic responses of various speakers, sensors, and microphones.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Kai Li, Yufeng Liu, Yuntong Dai, Yong Yu
Summary: This paper presents a novel light-powered self-oscillating liquid crystal elastomer (LCE) bow that can self-oscillate continuously and periodically under steady illumination. The dynamics of the LCE bow are theoretically investigated and numerical calculations predict its motion regimes. The suggested LCE bow offers potential advantages in terms of simple structure, customizable size, flexible regulation, and easy assembly.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Carmelo Rosario Vindigni, Giuseppe Mantegna, Calogero Orlando, Andrea Alaimo
Summary: In this study, a simple adaptive flutter suppression system is designed to increase the operative speed range of a wing-aileron aeroelastic plant. The system achieves almost strictly passivity by using a parallel feed-forward compensator implementation and the controller parameters are optimized using a population decline swarm optimization algorithm. Numerical simulations prove the effectiveness of the proposed simple adaptive flutter suppression architecture in different flight scenarios.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Bowen Yao, Yanni Zhang, Qinbo Zhou, Bin He, Guoping Wang, Xiaoting Rui
Summary: This paper investigates the vibration isolation of a beam with embedded graded reinforced double-leaf ABH structures. The results show that this design can improve both broadband low-frequency vibration isolation performance and the structural stiffness.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Muhammad Ayaz Akbar, Wai On Wong, Emiliano Rustighi
Summary: This research article presents a numerical approach to establish an optimal design methodology for a single-mass impact damper. The study finds that a single-mass impact damper designed with the optimal combination of design parameters can provide better vibration damping and relatively steady response. It outperforms the tuned mass damper in damping free vibrations of a single-degree-of-freedom primary structure. Although it cannot suppress forced vibration amplitude as effectively as a tuned mass damper at resonance, it has the advantages of lower cost and easier installation.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
E. De Bono, M. Morell, M. Collet, E. Gourdon, A. Ture Savadkoohi, M. Ouisse, C. H. Lamarque
Summary: This study presents a novel control algorithm for electroacoustic resonators, which transforms the linear acoustic response to nonlinear by changing the acoustical behavior of the device. The algorithm is tested and validated through numerical simulations and experimental tests, and it opens up the possibility of developing unconventional absorbers that can utilize nonlinear phenomena for noise attenuation.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Liyuan Li, Bin Li
Summary: This study proposes a new design scheme for eddy current dampers to achieve high energy dissipation efficiency in confined installation spaces. By establishing a simplified damping model and a mechanical-magnetic coupling finite element model, the nonlinearity of eddy current damping is effectively characterized and validated through experiments.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Karl-Alexander Hoppe, Kevin Josef Li, Bettina Chocholaty, Johannes D. Schmid, Simon Schmid, Kian Sepahvand, Steffen Marburg
Summary: This study expands the methods for non-destructively identifying material properties of a structure using modal data. It improves the results significantly by using eigenvectors instead of eigenvalues and accelerates the inversion process with a generalized polynomial chaos surrogate. A methodology for reusing surrogate models across inversion tasks is also developed.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Yue Xiang, Ping Tan, Hui He, Hongcan Yao, Xiaojun Zheng
Summary: This study extends the scope of structural control strategy by introducing a pendulum-tuned mass damper considering geometric nonlinear dampers. The proposed PTMD with GND effectively mitigates seismic response and outperforms inverted rough linear adjustment. The optimal design strategy efficiently suppresses structural vibration and adaptively utilizes the nonlinearity of the GND damping mechanism.
JOURNAL OF SOUND AND VIBRATION
(2024)
