Research on the performance of hydraulic vibratory hammer with coupled dynamic model
SN Applied Sciences, 2022 Hydraulic vibratory hammer is a key equipment during piling process, and mechanical, hydraulic part of the hammer and workload are coupled with each other during operation. The vibration performance depends on the design parameters and the driving system.
Gao Lulu, Wang Dongyue, Wang Shite
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A Self-Oscillating Driving Circuit for Low-Q MEMS Vibratory Gyroscopes
Micromachines, 2023 This article establishes a circuit model with which to analyze the difficulty of auto-gain control driving for low-Q micromechanical gyroscopes at room temperature and normal pressure.
Tian Han +5 more
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Frontiers in Marine Science, 2023 The growing interest in offshore wind leads to an increasing number of wind farms planned to be constructed in the coming years. Installation of these piles often causes high underwater noise levels that harm aquatic life.
Timo Molenkamp +2 more
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Investigation of the relationship between the design and technological parameters of vibration and oscillating rollers [PDF]
Научно-технический вестник Брянского государственного университета, 2021 Simulation is an important step in the design of new road roller models. In the process of modeling, it is possible to exclude options that do not allow obtaining the optimal structure or parameters of the designed machine. To carry out this stage, it is
Shishkin E.A. +4 more
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Ground Vibration Response to Vibratory Sheet Pile Driving and Extraction
Buildings, 2023 Sheet piles are extensively used as foundation structures in urban environments. However, the vibrations associated with sheet pile construction can potentially adversely affect existing buildings, as well as cause discomfort to nearby residents.
Feng Guo +6 more
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Multimodal electromechanical model of piezoelectric transformers by Hamilton's principle [PDF]
, 2009 This work deals with a general energetic approach to establish an accurate electromechanical model of a piezoelectric transformer (PT). Hamilton’s principle is used to obtain the equations of motion for free vibrations. The modal characteristics (mass,
Nadal, Clément, Pigache, François
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Numerical evaluation of the pipe-pile buckling during vibratory driving in sand [PDF]
, 2019 The buckling of steel pipe piles during vibratory driving is numerically studied using the Multi-Material Arbitrary Lagrangian-Eulerian (MMALE) method. This method handles the large soil deformations that occur during pile driving and other geotechnical ...
Aubram, Daniel +3 more
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Field Tests to Investigate the Penetration Rate of Piles Driven by Vibratory Installation
Shock and Vibration, 2017 Factors directly affecting the penetration rate of piles installed by vibratory driving technique are summarized and classified into seven aspects which are driving force, resistance, vibratory amplitude, energy consumption, speeding up at the beginning,
Zhaohui Qin +3 more
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A closed-loop digitally controlled MEMS gyroscope with unconstrained Sigma-Delta force-feedback [PDF]
, 2009 In this paper, we describe the system architecture and prototype measurements of a MEMS gyroscope system with a resolution of 0.025 degrees/s/root Hz. The architecture makes extensive use of control loops, which are mostly in the digital domain.
Cretu, Edmon +3 more
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Numerical evaluation of the soil behavior during impact driving of pipe-piles [PDF]
, 2019 During the impact driving of pipe-piles, the soil is influenced in different ways including the void ratio, stress distribution, and plugging formation.
Aubram, Daniel +3 more
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