scholarly journals Reduction of Vibration Transmission in String Trimmers

2011 ◽  
pp. 129-138 ◽  
Author(s):  
Paurakh Rajbhandary ◽  
Jack Leifer ◽  
Bryan J. Weems
Keyword(s):  
Vibration Transmission

Estimating vibration transmission characteristics in tooth roots: A study.

1987 ◽  
Vol 31 (4) ◽  
pp. 907-915
Author(s):  
Eiichi Hanzawa ◽  
Hideaki Takehana ◽  
Akira Kimura ◽  
Minoru Toyoda ◽  
Etsuro Matsuo
Keyword(s):  
Transmission Characteristics ◽  
Vibration Transmission ◽  
Tooth Roots

Reduction of the Vibration Transmission in a Front Wiper System

2001 ◽  
Author(s):  
Sandrine Colnet ◽  
Arnaud Caracciolo
Keyword(s):  
Vibration Transmission

scholarly journals Study on Vibration Transmission among Units in Underground Powerhouse of a Hydropower Station

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3015 ◽  
Author(s):  
Jijian Lian ◽  
Hongzhen Wang ◽  
Haijun Wang
Keyword(s):  
Low Frequency ◽  
Field Tests ◽  
Vertical Vibration ◽  
Transmission Mechanism ◽  
Structural Vibration ◽  
Hydropower Station ◽  
Fe Model ◽  
Vibration Transmission ◽  
Underground Powerhouse ◽  
Mechanical Models

Research on the safety of powerhouse in a hydropower station is mostly concentrated on the vibration of machinery structure and concrete structure within a single unit. However, few studies have been focused on the vibration transmission among units. Due to the integrity of the powerhouse and the interaction, it is necessary to study the vibration transmission mechanism of powerhouse structure among units. In this paper, field structural vibration tests are conducted in an underground powerhouse of a hydropower station on Yalong River. Additionally, the simplified mechanical models are established to explain the transmission mechanism theoretically. Moreover, a complementary finite element (FE) model is built to replicate the testing conditions for comprehensive analysis. The field tests results show that: (1) the transmission of lateral-river vibration is greater than those of longitude-river vibration and vertical vibration; (2) the vibration transmission of the vibrations that is caused by the low frequency tail fluctuation is basically equal to that of the vibrations caused by rotation of hydraulic generator. The transmission mechanism is demonstrated by the simplified mechanical models and is verified by the FE results. This study can provide guidance for further research on the vibration of underground powerhouse structure.

Vibration Transmission Between Columns and Built Up Structures

1994 ◽  
Vol 1 (3) ◽  
pp. 235-246
Author(s):  
John A. Steel
Keyword(s):  
Sound Transmission ◽  
Transmission Characteristics ◽  
Vibration Transmission ◽  
Laboratory Models ◽  
Good Agreement

Vibration transmission from columns into built up structures is studied using laboratory models. Beams attached to plates, forming built up structures, can influence transmission characteristics at these joints. Good agreement is found between measured and predicted results. The orientation of the beams effects coupling and strongest coupling is through a twisting moment applied to the beam. The effects of these changes in coupling on sound transmission between floors is discussed.

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