Article
Acoustics
Bo Yan, Xiagui Pan, Ran Su, Chuanyu Wu
Summary: This study investigates the dynamics behavior of a tumbler on an arc surface. The results demonstrate the potential for designing low-frequency vibration devices and open up new possibilities for tumbler-inspired structures.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Automation & Control Systems
Jinchuan Yang, Pingfa Feng, Jianfu Zhang, Jianjian Wang
Summary: A novel full wedge-type insert mounting method was developed and its performance was evaluated through simulation and experiments. The results showed that the full wedge-type threaded connection method had less intense vibration amplitude fluctuations compared to the ordinary threaded connection method during insert mounting, which can be attributed to the contact force amplification effects on the wedge-type interface.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Dong Liu, Guo Yao
Summary: This study simulates the pyrotechnic launch process in aerospace engineering and analyzes the dynamic responses of the projectile during pyrotechnic ejection by studying the aeroelastic stability and nonlinear vibration of a rectangular plate subjected to time-varying axial blast load in a narrow space. The results showed that the plate loses stability rapidly when the explosion occurs and exhibits flutter instability with an increase in plate velocity during pyrotechnic ejection. The amplitude jumping phenomenon of the plate was observed, and the explosion strengthen, explosion position, slit height, and aspect ratio of the plate significantly affected the stability and displacement jumping amplitude of the pyrotechnic ejection plate.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Mechanics
Xinyu Li, Hao Zhang, Haiyang Yang, Junrong Luo, Zhongmin Xiao, Hongshuai Lei
Summary: Due to their excellent mechanical properties and design flexibility, fluted-core composite sandwich structures have gained significant attention in aerospace and rail transit applications. This study investigated the free-vibration characteristics and optimized design of composite fluted-core sandwich cylinders through theoretical models and experimental tests.
COMPOSITE STRUCTURES
(2024)
Article
Chemistry, Physical
Mengen Li, Qiaoyun Zhang, Bingbing Wang, Minghao Zhao
Summary: The study established a nanoplate model for piezoelectric semiconductor plate structures by extending the first-order shear deformation theory and analyzed the flexural vibrations subjected to a transversely time-harmonic force. Numerical results revealed that the initial electron concentration significantly affects the natural frequency and electromechanical fields of piezoelectric semiconductors.
Article
Construction & Building Technology
Ganzhong Liu, Jianli Cong, Ping Wang, Shuai Du, Li Wang, Rong Chen
Summary: The research studied the vertical vibration characteristics and transmission speed of ballast, accurately measured and analyzed through different methods. It was found that the natural frequency and damping ratio of ballast are significantly affected by shape, with ballasted stacks exhibiting soft material characteristics. At lower frequencies, the vibration suppression ability of the ballasted bed is stronger.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Mathematics, Applied
Mohammed K. Alkharisi, Paul R. Heyliger
Summary: This study investigates the natural frequencies and mode shapes of sagged cables fixed at the same level using numerical models and experimental results. A generalized cable finite element model is formulated to describe the coupled dynamic motion of the cable line, considering axial and torsional characteristics. The results show excellent agreement with the experimental results, indicating significant levels of modal coupling.
FINITE ELEMENTS IN ANALYSIS AND DESIGN
(2023)
Article
Materials Science, Characterization & Testing
Mariona Heras Segura, Kumar Singh, Fazeel Khan
Summary: The study involved the design, fabrication, and testing of multi-polymer axially graded structures using 3D printing to control and avoid undesirable vibration behavior in machinery subject to mechanical excitations. The ability to combine different materials through additive manufacturing has shown success in creating graded structures with specific performance metrics. This technique enables the development of tuned structures that meet desired spectral characteristics in machinery design.
Article
Engineering, Mechanical
Bo Dou, Hu Ding, Xiao-Ye Mao, Hui-Rong Feng, Li-Qun Chen
Summary: In this study, a novel dynamic model of the retaining clip for pipes is proposed, which allows for more accurate description of the pipe's vibration when restrained by a clip. The research findings show that the clip parameters have a nonlinear influence on the pipe's natural frequencies, and neglecting the clip width or modeling it as a boundary will result in noticeable errors. The change in clip stiffness affects the symmetry of the modes and the number and locations of modal nodes, while increasing the clip thickness or width significantly alters the modal shapes of symmetric modes.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Computer Science, Information Systems
Zhibo Sun, Yan Shi, Na Wang, Jian Zhang, Yixuan Wang, Shaofeng Xu
Summary: This paper presents a simplified and novel pneumatic spring structure with only a conical rubber surface, analyzes the nonlinear stiffness based on the ideal gas model and material mechanics, establishes a dynamic model, and achieves optimal function of mass and pressure. The results show the effectiveness of the simulation analysis, providing an important basis for future research on precise active control of pneumatic suspension in vehicles.
Article
Agriculture, Multidisciplinary
Peng Zhuo, Yexin Li, Haobo Jiao, Pei Wang, Chengsong Li, Qi Niu, Lihong Wang
Summary: This study experimented and evaluated the vibration response characteristics of small and densely planted Jun jujube branches, obtaining the sixth-order natural frequency and optimizing the vibration effect score, providing a reference for mechanical harvesting of jujube.
COMPUTERS AND ELECTRONICS IN AGRICULTURE
(2022)
Article
Engineering, Marine
Bin Zhang, Junhan Li, Wei Liu, Huaiyuan Zhang, Pengkun Shi, Xiaoli Fu
Summary: Scour is a key factor in the collapse of buildings in water. This study investigates the scour phenomenon around a monopile and the change in its natural vibration frequency under wave-current conditions. The results show that the scour depth is greater under combined wave-current conditions and increases with higher flow velocity and lower water depth.
Article
Engineering, Marine
Yiping Liu, Zhaoming Lu, Xinxing Yan, Zejia Liu, Liqun Tang
Summary: A comprehensive vibration testing of an offshore platform was conducted to understand its vibrating features and determine unknown parameters such as mass and exciting load through the establishment of a finite element model with explicit solution. The results showed good agreement between the modified model and target values, demonstrating the feasibility of determining unknown parameters in a complex structure through an updating method.
Article
Mathematics
Leopoldo Prieto, Alejandro Quesada, Ana Maria Gomez Amador, Vicente Diaz
Summary: A mathematical equation system was developed to calculate the natural frequencies of helical springs, and its predictions were compared with finite element simulation. The general equations governing the vibration of helical springs were derived, describing the characteristics of the spring oscillation.
Article
Forestry
Yan Xuan, Linyun Xu, Guanhua Liu, Jie Zhou
Summary: This study investigated the influence of ginkgo crown structure on vibration characteristics and damping coefficient, finding that sympodial branching trees exhibited better vibration characteristics. The results suggest that controlling the crown structure of fruit trees to be sympodial branching through pruning may help improve overall vibration characteristics of fruit trees.
