Study on damping characteristic of honeycomb paperboard and vibration reduction mechanism of packaging system

2019 ◽  
Vol 25 (9) ◽  
pp. 1536-1542 ◽  
Author(s):  
Dongmei Wang ◽  
Rui Yang
Keyword(s):  
Vibration Reduction ◽  
Cell Length ◽  
Face Sheet ◽  
Damping Capacity ◽  
Reduction Mechanism ◽  
Packaging System ◽  
Environmental Friendliness ◽  
Paper Honeycomb ◽  
Compression Resistance ◽  
Reduction Capacity

Honeycomb paperboard has been widely used in transportation and packaging of electronic instruments and furniture owing to the advantages of light weight, good compression resistance, environmental friendliness, and easy degradation. As a common cushioning material in transportation, it is worth studying the damping characteristic and vibration reduction mechanism of honeycomb paperboard. Based on the basic principles of vibration mechanics, the damping of honeycomb paperboard was proposed. Then the influences of cell length, paperboard thickness, grammage of core paper, and the honeycomb structures with face sheet or without face sheet on the damping characteristic of honeycomb paperboard were analyzed. Finally, the vibration reduction mechanism of packaging system with honeycomb paperboard and block was discussed briefly. The results show that the damping value of honeycomb paperboard decreases with the increase of cell length and paperboard thickness. The honeycomb paperboard with large grammage of core paper has high damping value, and yet paper honeycomb core structure without face sheet has poor damping capacity. What's more, the vibration reduction capacity of packaging system is influenced by the deformation and damping characteristic of honeycomb paperboard, among which material damping and structural damping contribute more, honeycomb deformation and air damping contribute less. The weight of block does not affect the damping characteristic of honeycomb paperboard, but affects the vibration reduction capacity of the whole system.

A Study on Vibration Reduction Mechanism of Precision Stage for Laser Direct Imaging

2017 ◽  
Vol 34 (6) ◽  
pp. 431-437 ◽  
Author(s):  
Chang Hoon Seo ◽  
Hyeong Gyu Lee ◽  
Yong Ho Jeon ◽  
Moon Gu Lee
Keyword(s):  
Vibration Reduction ◽  
Reduction Mechanism ◽  
Direct Imaging ◽  
Precision Stage

Vibration Reduction of a Double-Layer System Sandwiched with Elastic Medium

2016 ◽  
Vol 16 (10) ◽  
pp. 1550065
Author(s):  
Yi-Ren Wang ◽  
Ting-Yu Lin
Keyword(s):  
Elastic Medium ◽  
Vibration Reduction ◽  
Membrane System ◽  
Damping Capacity ◽  
Precision Manufacturing ◽  
Layer System ◽  
Manufacturing Equipment ◽  
Metal Plates ◽  
Main Component ◽  
Damping Capability

This study developed a passive vibration reduction method to provide the damping capability for precision manufacturing equipment in an economical manner. The structure of the damping device is simple, which does not require changes in the frequency of the external force. An elastic medium was sandwiched between the bottom of the main component and the underlying plate or membrane. This combination results in a damper capable of reducing vibrations in the precision manufacturing equipment. We analyzed the influence of the elastic modulus and geometry of the elastic medium in the plate–plate or plate–membrane system on the damping capability. Among the various dampers considered herein, the combinations that include stiffer foams and a flexible membrane provide the greatest damping capability, far exceeding that of the metal plates. The results also show that the damping capacity offered by a rectangular frame with a diagonal x-shaped elastic medium is close to that of a full sheet.

Dynamic model and analysis of a dielectric elastomer vibration isolator

2019 ◽  
Vol 30 (16) ◽  
pp. 2396-2404 ◽  
Author(s):  
Lili Meng ◽  
Fucai Li ◽  
Hongguang Li
Keyword(s):  
Dynamic Model ◽  
Nonlinear Response ◽  
Electromechanical Coupling ◽  
Vibration Reduction ◽  
Dielectric Elastomer ◽  
Electroactive Polymer ◽  
Reduction Mechanism ◽  
Vibration Isolator ◽  
Soft Actuators ◽  
Nonlinear Performance

Dielectric elastomers are a kind of electroactive polymer and have a great potential for application to soft actuators. Dielectric elastomer materials also feature nonlinear response owing to the electromechanical coupling. In this work, a theoretical dynamic model was developed to characterize the nonlinear performance of a dielectric elastomer actuator used as a vibration isolator. The vibration reduction mechanism of dielectric elastomer structures is theoretically described. An experiment was also performed to validate the model. The experimental results tend to match well with the numerical calculation.

Torsion and vibration reduction mechanism of roller PDC hybrid bit

2021 ◽  
pp. 109491
Author(s):  
Kuilin Huang ◽  
Yingxin Yang ◽  
Gao Li ◽  
Yuntian Wang ◽  
Haitao Ren ◽  
...  
Keyword(s):  
Vibration Reduction ◽  
Reduction Mechanism

Stabilization of Soil Arsenic with Iron and Nano-Iron Materials: A Review

2021 ◽  
Vol 21 (1) ◽  
pp. 10-21
Author(s):  
Changsheng Yue ◽  
Huili Du ◽  
Yan Li ◽  
Naiyi Yin ◽  
Ben Peng ◽  
...  
Keyword(s):  
Chemical Stabilization ◽  
Environmental Friendliness ◽  
Factors Affecting ◽  
Binary Oxides ◽  
Soil Arsenic ◽  
Coprecipitation Process ◽  
Iron Iron ◽  
High Reduction ◽  
Capacity Cost ◽  
Reduction Capacity

Soil arsenic (As) contamination is an important environmental problem, and chemical stabilization is one of the major techniques used to remediate soil As contamination. Iron and iron nanoparticle materials are widely used for soil As stabilization because they have one or more of the following advantages: high adsorption capacity, high reduction capacity, cost effectiveness and environmental friendliness. Therefore, this review introduces the stabilization of soil As with iron and iron nanoparticles, including zero-valent iron, iron oxides/hydroxides, some iron salts and Fe-based binary oxides and the nanoparticles of these iron materials. The mechanism of chemical soil As stabilization, which involves adsorption and the coprecipitation process, is discussed. The factors affecting the chemical stabilization process are presented, and challenges to overcome in the future are also discussed in this review.

scholarly journals Investigation of vibration transmissibility for paper honeycomb sandwich structures with various moisture contents

2019 ◽  
Vol 20 (1) ◽  
pp. 108
Author(s):  
Dong-Mei Wang ◽  
Rui Yang
Keyword(s):  
Moisture Content ◽  
Sandwich Structure ◽  
Sandwich Structures ◽  
Absorption Capacity ◽  
Cell Length ◽  
Vibration Prediction ◽  
Honeycomb Sandwich ◽  
Vibration Transmissibility ◽  
Paper Honeycomb ◽  
Honeycomb Sandwich Structure

Vibration transmissibility is an important factor to characterize the vibration absorption performance of cushioning packaging materials during transportation. Reasonable prediction of vibration transmissibility can guide antivibration design and reduce packaging cost. As a kind of green cushioning material, paper honeycomb sandwich structure is widely used in transport packaging because of its good machinability. But at the same time, it also has strong water absorption capacity. To a great extent, the vibration transmissibility of paper honeycomb sandwich structure may be affected by ambient humidity. In this research, the vibration transmissibility of paper honeycomb sandwich structures with various structure sizes under different humidity was tested by sine frequency sweep experiments. The rule of maximal vibration transmissibility with moisture content, cell length of honeycomb, and thickness of sandwich structure was analyzed. The results show that the maximal vibration transmissibility of paper honeycomb sandwich structure increases with the increase of moisture content, cell length of honeycomb, and thickness of sandwich structure. In order to construct the relationship between maximal vibration transmissibility and various factors, the moisture content was standardized. Finally, the maximal vibration transmissibility evaluation equation of paper honeycomb sandwich structure containing standardized moisture content and size of sandwich structure was obtained, which is of some reference value for vibration prediction of paper honeycomb sandwich structures.

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