Estimation of payload random vibration loads for proper structure design

2001 ◽  
Author(s):  
Y. Chung ◽  
D. Krebs ◽  
J. Peebles
Keyword(s):  
Random Vibration ◽  
Structure Design ◽  
Vibration Loads

Evaluation of flight equipment acceleration caused by random vibration loads

AIAA Journal ◽  
2001 ◽  
Vol 39 ◽  
pp. 2001-1758
Author(s):  
Romualdo Ruotolo ◽  
Massimiliano Cotterchio
Keyword(s):  
Random Vibration ◽  
Vibration Loads

Random Vibration Structure Fatigue Analysis Based on Finite Element Simulation

2014 ◽  
Vol 875-877 ◽  
pp. 2078-2086
Author(s):  
Long Tao Liu ◽  
Chuan Ri Li ◽  
Shuang Long Rong ◽  
You Gang Jin
Keyword(s):  
Finite Element ◽  
Random Vibration ◽  
Element Model ◽  
Product Structure ◽  
Structure Design ◽  
Frequency Domain Method ◽  
Element Analysis ◽  
Power Spectral ◽  
Element Simulation ◽  
The Finite Element Analysis

In order to analyze the fatigue of the airborne product structure, the modal analysis and random vibration analysis are conducted for the product by using the finite element analysis software ANSYS. The modal analyzing results are compared with the modal test results and the finite element model is corrected. The stress response power spectral density is obtained from random vibration analyzing. A frequency domain method for calculating the fatigue damage of the structure is presented. The simulation results are in agreement with the reliability enhancement testing results. An optimization scheme for the product structure design is given.

Structure Design and Mechanical Analysis on a Large Spaceborne Flat Seam Antenna

2014 ◽  
Vol 543-547 ◽  
pp. 291-294
Author(s):  
Wen Jie Fan ◽  
Xiao Peng Li ◽  
Ning Li
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Modal Analysis ◽  
Random Vibration ◽  
Element Model ◽  
Mechanical Analysis ◽  
Structure Design

Large spaceborne flat seam antennas boom recently. The structure design of the large flat seam antenna is introduced, and finite element model is built. The first frequency of antenna is obtained from modal analysis and it meet the requirement. The results of sine vibration and random vibration shows that strength satisfy the requirement and it has a certain margin.

Force Limits Measured on a Space Shuttle Flight

2002 ◽  
Vol 45 (1) ◽  
pp. 144-148 ◽  
Author(s):  
Terry Scharton
Keyword(s):  
Random Vibration ◽  
Space Shuttle ◽  
Ground Vibration ◽  
Empirical Method ◽  
Published Data ◽  
Design Guide ◽  
Vibration Loads ◽  
Vibration Tests ◽  
Semi Empirical ◽  
Flight Measurements

The random vibration forces between a payload and the sidewall of the space shuttle have been measured in flight and compared with the force specifications used in ground vibration tests. The flight data are in agreement with a semi-empirical method, which is widely used to predict vibration test force limits. The flight measurements are less than one-half of the random vibration loads specified in the shuttle payload design guide. These data are consistent with published data [1]

Fatigue failure of pb-free electronic packages under random vibration loads

2018 ◽  
Vol 19 (2) ◽  
pp. 61-68 ◽  
Author(s):  
Saravanan S. ◽  
Prabhu S. ◽  
Muthukumar R. ◽  
Gowtham Raj S. ◽  
Arun Veerabagu S.
Keyword(s):  
Fatigue Failure ◽  
Random Vibration ◽  
Electronic Packages ◽  
Vibration Loads
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