Article
Engineering, Industrial
Delphine Chadefaux, Alex P. Moorhead, Pietro Marzaroli, Stefano Marelli, Enrico Marchetti, Marco Tarabini
Summary: WBV is an occupational hazard affecting employees working with transportation, construction or heavy machinery. ISO identified WBV exposure limits based on vibration transmissibility and apparent mass studies. In our study, we found that the transmission rates vary during stationary and propelled walking, indicating a need for adjusting ISO standards for active workers.
APPLIED ERGONOMICS
(2021)
Article
Engineering, Mechanical
Hao Kuang, Yi Qiu, Chi Liu, Xu Zheng
Summary: This paper presents a model that effectively characterizes the nonlinearity in the apparent mass of a seated human body subjected to vertical vibration. The model was validated through vibration measurement and sensitivity analysis, and it holds significant potential for improving seating systems and enhancing ride comfort in vehicles.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Industrial
Mael Amari, Nellie Perrin
Summary: Mobile machinery operators are exposed to whole-body vibrations and unfavourable body posture, which may have adverse effects on the spine. This study provides measurements of apparent mass and seat-to-head transmissibility in different postures, aiming to understand the effects of vibration on the spine.
Article
Engineering, Industrial
Rajesh Govindan, V. H. Saran, S. P. Harsha
Summary: The study investigates the biodynamic responses of semi-supine humans exposed to varying vertical vibration magnitudes through a multi-body modeling approach. The calibrated model accurately predicts the decrease in primary resonance frequency with increased vibration magnitude, showcasing nonlinearity in the vertical transmissibility responses of all body segments.
INTERNATIONAL JOURNAL OF INDUSTRIAL ERGONOMICS
(2021)
Article
Engineering, Mechanical
Rajesh Govindan, V. Huzur Saran, Suraj Prakash Harsha
Summary: This study investigates the transmissibility responses of 14 male subjects exposed to vertical sinusoidal vibration at different frequencies and magnitudes. The results show that the resonance frequency decreases with increasing vibration magnitude for the sternum, abdomen, thigh, and leg. Higher vibration magnitudes result in greater segmental transmissibility at frequencies lower than the resonance frequency. The abdomen exhibits the highest vibration transmissibility, followed by the thigh, sternum, and head.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Mechanical
Salam Rahmatalla, Guandong Qiao, Rachel Kinsler, Jonathan DeShaw, Andrew Mayer
Summary: Previous studies have shown nonlinear softening behaviors in human response to whole-body vibration at low magnitudes, but this study observed a transition to stiffening behaviors at higher magnitudes. This shift from softening to stiffening responses may have implications for the design of transport systems operating on rough terrains.
Article
Acoustics
Chi Liu, Yi Qiu
Summary: The inclination of the backrest affects the biodynamic response and model parameters, with the resonance frequency of the vertical in-line apparent mass increasing as the backrest inclination increases, and the resonance frequency of the fore-and-aft cross-axis apparent mass decreasing.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Engineering, Mechanical
Ya Huang, Neil Ferguson
Summary: This study analyzed dynamic forces measured during whole-body vibration, focusing on cross-axis response and source identification. The results showed correlations between inline longitudinal and cross-axis vertical forces at lower to medium frequency ranges, while above this range the forces tended to be independent. Proposed signal processing framework considers cross-axis responses in human vibration.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Engineering, Mechanical
Zhuang Dong, Baiyang Shi, Jian Yang, Tianyun Li
Summary: The study introduces a nonlinear passive joint device based on inerter for vibration attenuation in coupled systems. The proposed joint can effectively shift response peaks to lower frequencies, substantially reducing vibrations and energy transmission between subsystems when added to the force-excited subsystem or to the coupling interface of subsystems.
NONLINEAR DYNAMICS
(2022)
Article
Engineering, Mechanical
Baiyang Shi, Wei Dai, Jian Yang
Summary: This study presents a nonlinear vibration isolator with a geometrical nonlinearity created by configuring an inerter in a diamond-shaped linkage mechanism. The use of the nonlinear inerter in the isolator shifts and bends the peaks of the transmissibility and power flow to the low-frequency range, creating a larger frequency band of effective vibration isolation.
NONLINEAR DYNAMICS
(2022)
Article
Engineering, Mechanical
Chao Sun, Chi Liu, Xu Zheng, Jun Wu, Zunming Wang, Yi Qiu
Summary: Most previous studies on the biodynamics of the seated human body focused on vertical vibration in the sagittal plane. However, this study used combined tri-axial translational vibration excitation to investigate the biodynamics in both sagittal and coronal planes. They developed an analytical model to represent the biodynamic responses of the seated human body to this type of vibration.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Mechanical
Shihua Zhou, Bowen Hou, Lisheng Zheng, Pingzhen Xu, Tianzhuang Yu, Zhaohui Ren
Summary: A novel bio-inspired vibration isolation-absorption (BIVIA) system is presented, inspired by the anti-vibration and shock absorption properties of the ostrich. The system is designed to achieve wideband vibration isolation bandwidth, low-frequency/ultra-low-frequency vibration isolation, and high stability using a toe-leg-spine coupling structure. The influences of different parameters on the performance of the BIVIA system are discussed, and it is found that coupled vibration isolation-absorption structures can achieve high loading capacity and extended quasi-zero stiffness (QZS) zone. The adjustable vibration isolation-absorption performance of the BIVIA structure makes it a practical method for bio-inspired vibration isolation, suitable for engineering and manufacturing applications.
NONLINEAR DYNAMICS
(2023)
Article
Acoustics
Louis Krause, Steven van de Par, Stephan Toepken
Summary: Noise and vibration can decrease passenger comfort during aircraft flight. A study was conducted with 40 participants to rate the pleasantness of different sinusoidal whole-body vibrations in terms of frequency and acceleration level. The results showed significant effects of frequency and level, as well as interactions between the two factors and between frequency and gender. Body-maps were used to link pleasantness ratings to corresponding body parts. In a second experiment, the same participants judged whether noise or vibration should be attenuated for comfort improvement.
Article
Engineering, Industrial
Salam Rahmatalla, Guandong Qiao, Jonathan DeShaw, Rachel Kinsler
Summary: This study presents a new methodology to quantify discomfort of supine humans in multi-axis whole-body vibration and reveals a strong correlation between reported discomfort and the vibration dose value at the head region.
Article
Engineering, Mechanical
Wei Dai, Jian Yang
Summary: This study investigates the dynamic behavior and vibration transmission of impact oscillators with nonlinear motion constraints. It was found that the use of nonlinear constraint can lead to higher response amplitudes but lower force transmissibility compared to linear constraints.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Engineering, Civil
Weidong Gong, Michael J. Griffin
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART F-JOURNAL OF RAIL AND RAPID TRANSIT
(2018)
Article
Public, Environmental & Occupational Health
Ying Ye, Michael J. Griffin
INTERNATIONAL ARCHIVES OF OCCUPATIONAL AND ENVIRONMENTAL HEALTH
(2018)
Article
Engineering, Industrial
Khairil Anas Md Rezali, Michael J. Griffin
Article
Engineering, Industrial
Giulia Patelli, Miyuki Morioka, Michael J. Griffin
Article
Engineering, Industrial
Chi Liu, Michael J. Griffin
INTERNATIONAL JOURNAL OF INDUSTRIAL ERGONOMICS
(2018)
Article
Engineering, Industrial
Giulia Patelli, Michael J. Griffin
APPLIED ERGONOMICS
(2019)
Article
Engineering, Industrial
Guangtai Zheng, Yi Qiu, Michael J. Griffin
INTERNATIONAL JOURNAL OF INDUSTRIAL ERGONOMICS
(2019)
Article
Engineering, Biomedical
Hatice Mujde Ayik, Michael J. Griffin
JOURNAL OF APPLIED BIOMECHANICS
(2019)
Article
Engineering, Civil
Chi Liu, David Thompson, Michael J. Griffin, Mani Entezami
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART F-JOURNAL OF RAIL AND RAPID TRANSIT
(2020)
Article
Computer Science, Artificial Intelligence
Xuguang Zhang, Dingxin Ma, Hui Yu, Ya Huang, Peter Howell, Brett Stevens
Article
Engineering, Mechanical
Ya Huang, Neil Ferguson
Summary: This study analyzed dynamic forces measured during whole-body vibration, focusing on cross-axis response and source identification. The results showed correlations between inline longitudinal and cross-axis vertical forces at lower to medium frequency ranges, while above this range the forces tended to be independent. Proposed signal processing framework considers cross-axis responses in human vibration.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Automation & Control Systems
Omar Mechali, Limei Xu, Ya Huang, Mengji Shi, Xiaomei Xie
Summary: This paper addresses the accurate fixed-time attitude and position control problems of a quadrotor UAV system by introducing a novel continuous nonsingular terminal sliding mode control scheme and disturbance observer-based control approach. The developed methods enhance the system's robustness and achieve stable control with fixed-time trajectory tracking. Experimental tests demonstrate the effectiveness of the proposed strategies.
CONTROL ENGINEERING PRACTICE
(2021)
Proceedings Paper
Computer Science, Artificial Intelligence
Malik Haddad, David Sanders, Alexander Gegov, Mohamed Hassan, Ya Huang, Mohamed Al-Mosawi
INTELLIGENT SYSTEMS AND APPLICATIONS, VOL 1
(2020)
Proceedings Paper
Computer Science, Artificial Intelligence
David Sanders, Martin Langner, Nils Bausch, Ya Huang, Sergey Khaustov, Sarinova Simandjunta
INTELLIGENT SYSTEMS AND APPLICATIONS, VOL 2
(2020)
Proceedings Paper
Computer Science, Artificial Intelligence
David Sanders, Qian Wang, Nils Bausch, Ya Huang, Sergey Khaustov, Ivan Popov
INTELLIGENT SYSTEMS AND APPLICATIONS, VOL 1
(2019)
Article
Acoustics
Sandip Chajjed, Mohammad Khalil, Dominique Poirel, Chris Pettit, Abhijit Sarkar
Summary: This paper reports the generalization of the Bayesian formulation of the flutter margin method, which improves the predictive performance by incorporating the joint prior of aeroelastic modal parameters. The improved algorithm reduces uncertainties in predicting flutter speed and can cut cost by reducing the number of flight tests.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Pascal Zeise, Bernhard Schweizer
Summary: Air ring bearings are an improved version of classical air bearings, providing better damping behavior and allowing operation above the linear threshold speed of instability. However, there is a risk of dangerous vibrations in certain rotor systems, which can be addressed by considering ring tilting effects.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Zbynek Sika, Jan Krivosej, Tomas Vyhlidal
Summary: This paper presents a novel design of a compact six degrees of freedom active vibration absorber with six identical eigenfrequencies. The objective is to completely suppress the vibration of a machine structure with six motion components. By utilizing a Stewart platform structure equipped with six active legs, a spatial unifrequency absorber with six identical eigenfrequencies is achieved. The design is optimized using a correction feedback and active delayed resonator feedback.
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
Nicco Ulbricht, Alain Boldini, Peng Zhang, Maurizio Porfiri
Summary: The quantification of fluid-structure interactions in marine structures is crucial for their design and optimization. In this study, an analytical solution for the free vibration of a bidirectional composite in contact with a fluid is proposed. By imposing continuity conditions and boundary conditions, the coupled fluid-structure problem is solved and applied to sandwich structures in naval construction, offering insights into the effects of water on mode shapes and through-the-thickness profiles of displacement and stress.
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
Eugenio Tramacere, Marius Pakstys, Renato Galluzzi, Nicola Amati, Andrea Tonoli, Torbjoern A. Lembke
Summary: This paper proposes the experimental stabilization of electrodynamic maglev systems by means of passive components, providing key technological support for the Hyperloop concept of high-speed and sustainable transportation.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Pengfei Deng, Xing Tan, He Li
Summary: In this paper, the authors improve the surface morphology method and study the bit-rock interaction model between the rock and the PDC bit, taking into account the impact of blade shape and cutter arrangement. They establish a dynamic model for a deep drilling system equipped with an arbitrary shape PDC bit and propose a stability prediction method. The results show that the shape of the blades and arrangement of the cutters on the PDC bit significantly affect the nonlinear vibration of the drilling system.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Salvador Rodriguez-Blanco, Javier Gonzalez-Monge, Carlos Martel
Summary: In modern LPT designs, the simultaneous presence of forced response and flutter in different operation regimes is unavoidable. Recent evidence suggests that the traditional linear superposition method may be overly conservative. This study examines the flutter and forced response interaction in a realistic low pressure turbine rotor and confirms that the actual response is much smaller than that predicted by linear superposition.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Kabilan Baskaran, Nur Syafiqah Jamaluddin, Alper Celik, Djamel Rezgui, Mahdi Azarpeyvand
Summary: This study investigates the impact of the number of blades on the aeroacoustic characteristics and aerodynamic performance of propellers used in urban air mobility vehicles. The results show that different blade numbers exhibit distinct noise levels, providing valuable insights for further research on propeller noise and aerodynamic performance.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Yongbo Peng, Peifang Sun
Summary: This study focuses on the reliability-based design optimization (RBDO) of the tuned mass-damper-inerter (TMDI) system under non-stationary excitations. The performance of the optimized TMDI system is evaluated using probability density evolution analysis. The results demonstrate the technical advantages of TMDI, including high vibration mitigation performance, considerable mass reduction, and less stroke demand.
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
Bronislaw Czaplewski, Mateusz Bocian, John H. G. Macdonald
Summary: Despite two decades of study, there is currently no model that can quantitatively explain pedestrian-generated lateral forces. This research proposes a foot placement control law based on empirical data to calibrate and generalize the rigid-leg inverted pendulum model (IPM) for predicting lateral structural stability.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Justine Carpentier, Jean-Hugh Thomas, Charles Pezerat
Summary: This paper proposes an improved method for the identification of vibration sources on a car window using the corrected force analysis technique. By redefining inverse methods in polar coordinates, more accurate results can be obtained.
JOURNAL OF SOUND AND VIBRATION
(2024)