scholarly journals Influence of Smart Spring Support Parameters on Vibration Characteristics of Three Support Shafting

2020 ◽  
Vol 10 (21) ◽  
pp. 7752
Author(s):  
Miao-miao Li ◽  
Liang-liang Ma ◽  
Chuan-guo Wu ◽  
Zhuo Li ◽  
Ru-peng Zhu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Performance Test ◽  
Vibration Characteristics ◽  
The Finite Element Method ◽  
Test Bed ◽  
Obvious Effect ◽  
Shaft System ◽  
Spring Support ◽  
Element Method

Smart spring support is a kind of active damping device based on piezoelectric material. It can effectively suppress the vibration of a shaft system in an overly critical state by changing the stiffness and damping of the support. The support parameters have a significant impact on the vibration of the system. By studying the influence of the smart spring support parameters on the vibration characteristics of the transmission shaft system, the support parameters can be configured more reasonably so that the vibration of the transmission system can be reduced as much as possible. Based on the finite element method, this paper studies the influence of the stiffness, damping and mass of the smart spring support on the vibration characteristics of the three-support shafting. Firstly, the smart spring shafting test bed is built, and the vibration reduction performance test of the smart spring is carried out to verify the damping effect of the smart spring. Then, the shafting dynamic model is established by the finite element method, and the inherent characteristics of the system are analyzed. Finally, the influence of the stiffness, damping, mass and other parameters of the smart spring support on the dynamic response of the system is studied. The results show that increasing the stiffness of the smart spring support can effectively reduce the vibration amplitude of the system. The damping of the smart spring support has no obvious effect on the vibration of the shafting. The smaller the mass of the smart spring support, the more favorable the system is.

Vibration characteristics of steering columns with bellows

2001 ◽  
Vol 215 (2) ◽  
pp. 171-178
Author(s):  
K H Kim ◽  
G H Han ◽  
H K Kim
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Optimal Design ◽  
Vibration Characteristics ◽  
Sensitivity Analyses ◽  
Design Parameters ◽  
The Finite Element Method ◽  
Negative Effects ◽  
Vibration Sensitivity ◽  
Element Method

Bellows can be used as collapse elements for automotive steering columns. The crash performance of the steering column can be significantly improved with the bellows. However, the bending flexibility of the bellows has negative effects on the vibration characteristics. An effort is made to improve the vibration characteristics of steering columns with bellows. To understand the effects of various design parameters on the collapse and vibration, sensitivity analyses are performed by the finite element method using Taguchi's scheme. It is shown that the structure of the upper mounting bracket is the most important parameter affecting the vibration characteristics. An optimal design is proposed for a lower tilt type steering column.

Experiments and Analysis of the Structure of Concrete Roof Insulation

2013 ◽  
Vol 368-370 ◽  
pp. 1086-1089
Author(s):  
Wen Shan Lin ◽  
Zong Kai Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Thermal Resistance ◽  
Performance Test ◽  
Thermal Characteristics ◽  
The Finite Element Method ◽  
Element Analysis ◽  
Building Roof ◽  
Resistance Network ◽  
Element Method

In this study, the building roof heat insulation structure was experiment and analysis. The simple approximation of a theory of thermal resistance network of the heat insulating structure was analyzed. The finite element method is proposed to evaluate the thermal characteristics of building components. The comparison between the finite element method and the thermal resistance network method was conducted by testing the thermal resistance of a concrete hollow block. Through the analysis of finite element method, the thermal resistance network and experimental validated, it is concluded the finite element analysis not only to calculated accuracy requirements but also has application in the form of the type of hole, material composition, intuitive analysis results. In the absence of test conditions or thermal performance test is not required, it is recommended to use finite element method to analyze problems.

Free Vibration of Blade Packets

1977 ◽  
Vol 19 (1) ◽  
pp. 13-21 ◽  
Author(s):  
J. Thomas ◽  
H. T. Belek
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Free Vibration ◽  
Flexural Rigidity ◽  
Vibration Characteristics ◽  
Experimental Results ◽  
The Finite Element Method ◽  
Reasonable Accuracy ◽  
Good Agreement ◽  
Element Method

The free-vibration characteristics of shrouded blade packets are studied using the finite-element method. The effects of various weight ratios, flexural rigidity ratios and length ratios between the blades and shrouds on the frequencies of vibration of the blade packet are investigated. It is shown that the vibration characteristics of a multibladed packet can be predicted with reasonable accuracy from the inference diagram of a two-bladed packet. The theory developed can be easily adapted for more complex blade packet configurations. The results presented for the frequencies of vibration are compared with experimental results and show good agreement with those of other investigators.

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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