A low frequency underwater metastructure composed by helix metal and viscoelastic damping rubber

Gao, Nansha; Yong-Yan, Zhang

doi:10.1177/1077546318788446

Cited by 83 publications

(22 citation statements)

References 25 publications

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“…At the same time, it is necessary to check the correct position of all inertial sensors and reasonably correct the position of sensors and the corresponding human body. In addition, it is necessary to ensure that there are no metal objects on the surface and near the space of the model body [34]; otherwise, the electromagnetic field will be distorted and the accuracy will be affected.…”

Section: Methodsmentioning

confidence: 99%

Basketball Technology Simulation Application Based on Virtual Reality

Song

2021

Mathematical Problems in Engineering

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The combination of virtual reality (VR) technology and basketball technology simulation can make the players have a real experience and experience, so as to effectively improve the quality of basketball training. It can also, according to the individual needs of different players, promote their physical and mental health development and improve the enthusiasm of basketball training, so as to improve the level of basketball technology. Immersive feeling and interest of human-computer interaction are the essential characteristics of virtual reality. The real conception of space-time environment, that is, the process of enlightening thinking and obtaining basketball technology simulation information, is the ultimate goal of virtual reality. In this experiment, five high-level basketball players in our city were selected and numbered from no. 1 to no. 5. Before the experiment, it is necessary to make the players warm up fully before the experiment and then test the forward turning technical movements of basketball. The test variables are based on different angles and distances. After that, standardized selection of basketball technical statistical indicators includes shooting hit rate, two-point hit rate, three-point hit rate, and free throw hit rate. According to the results of the experiment, it took the most time for the curve technique to lower the buffer stage, and it took up 29% of the total time of the entire precursor shot and turned back and the aerial shot stage is 23% and 22%, respectively. There is 20% time in the takeoff phase and 6% time in the brake phase. It has a great influence on the results of the game.

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Section: Methodsmentioning

confidence: 99%

Basketball Technology Simulation Application Based on Virtual Reality

Song

2021

Mathematical Problems in Engineering

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“…To increase the surface roughness in the machined parts using the EDM machines, the effects of cutting forces is analyzed by Tosun et al [13]. A low frequency underwater metastructure composed by helix metal and viscoelastic damping rubber systems are developed by Gao and Zhang [14]. New Stabilization Results for Semi-Markov Chaotic Systems with Fuzzy Sampled-Data Control is developed by Wu et al [15].…”

Section: -Review Of Research Work Analyzing and Minimizing The Surface Roughness In The Machining Operationsmentioning

confidence: 99%

WITHDRAWN: Surface Roughness Prediction and Minimization in 5-Axis Milling Operations of Gas Turbine Blades

Eyvazian

Musharavati

Khan

et al. 2021

Preprint

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To enhance the quality of machined parts, virtual machining systems are presented in this study. In the turbine blades, the minimization of the surface roughness of the blades can decrease the Reynolds number to decrease the loss of energy in power generation. Due to difficulties of polishing process in minimizing the surface roughness of machined blades, the optimized machining parameters for minimizing the surface roughness is an effective solution for the problem. In this study, a virtual machining system is developed to predict and minimize the surface roughness in 5-Axis machining operations of gas turbine blades. To minimize the surface roughness, the machining parameters were optimized by the Genetic algorithm. To validate the developed system, the turbine blades were machined using a 5-Axis CNC machine tool and the machined blades were measured using the CMM machine to obtain the surface roughness of machined parts. So, a 41.29% reduction in the measured surface roughness and a 42.09% reduction in the predicted surface roughness are obtained using the optimized machining parameters. The developed virtual machining system can be applied in the machining process of turbine blades to enhance the surface quality of machined blades and thus improve the efficiency of gas turbines.

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“…Physical mechanisms of acoustic coating included waveform transformation, multiple scattering, etc. Different geometries and materials of the helical structure aided in the adjustment of the sound absorption properties of materials [37].…”

Section: Local Design Of Acoustic Coatingsmentioning

confidence: 99%

“…( d ) Conventional local resonance acoustic metamaterials (LRAMs), double-layered cylindrical scatterers, three-layered cylindrical scatterers, and band diagram of the LRAMs with three-layered locally resonant scatterers [36]. ( e ) Three-dimensional geometric dimensions and experimental results of dynamic mechanical parameters of viscoelastic damping rubber [37].…”

Section: Figurementioning

confidence: 99%

From Local Structure to Overall Performance: An Overview on the Design of an Acoustic Coating

et al. 2019

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Based on the requirements of underwater acoustic stealth, the classification and research background of acoustic coatings are introduced herein. The research significance of acoustic coatings is expounded from the perspective of both the military and civilian use. A brief overview of the conventional design process of acoustic coatings is presented, which describes the substrates used in different countries. Aimed at the local design of acoustic coatings, research progress on passive and semi-active/active sound absorption structure is summarized. Focused on the passive acoustic coatings; acoustic cavity design and optimization, acoustic performance of acoustic coatings with rigid inclusions or scatterers, and acoustic coatings with a hybrid structure are discussed. Moreover, an overview of the overall design of acoustic coatings based on the sound field characteristics of the submarine is also presented. Finally, the shortcomings of the research are discussed, breakthroughs in acoustic coating design research are forecast, and the key technical issues to be solved are highlighted.

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A low frequency underwater metastructure composed by helix metal and viscoelastic damping rubber

Cited by 83 publications

References 25 publications

Basketball Technology Simulation Application Based on Virtual Reality

Basketball Technology Simulation Application Based on Virtual Reality

WITHDRAWN: Surface Roughness Prediction and Minimization in 5-Axis Milling Operations of Gas Turbine Blades

From Local Structure to Overall Performance: An Overview on the Design of an Acoustic Coating

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