Direct numerical simulation and analytical modeling of locally reacting, single degree of freedom acoustic liners with turbulent grazing flow

2014 ◽  
Author(s):  
Qi Zhang ◽  
Daniel J. Bodony
Keyword(s):  
Numerical Simulation ◽  
Direct Numerical Simulation ◽  
Analytical Modeling ◽  
Degree Of Freedom ◽  
Single Degree Of Freedom ◽  
Acoustic Liners ◽  
Single Degree ◽  
Grazing Flow

Response of Armour Plate Subjected to Blast Loading Based on Analytical Model of Second Order Single Degree of Freedom

2015 ◽  
Vol 819 ◽  
pp. 387-392
Author(s):  
Ahmad Zaidi Ahmad Mujahid ◽  
Shah Koslan Md Fuad ◽  
Othman Mohd Zaid
Keyword(s):  
Numerical Simulation ◽  
Blast Loading ◽  
Computer Code ◽  
Small Error ◽  
Second Order ◽  
Degree Of Freedom ◽  
Analytical Prediction ◽  
Reliable Technique ◽  
Single Degree Of Freedom ◽  
Single Degree

The rolled homogeneous armour (RHA) plate is commonly used for armoured vehicle skin. Preliminary predictions of the deflections from RHA plate subjected to blast loading is important for establishing guidelines before it is used in vehicle skin. The goal of this work is a reliable technique for predicting the RHA plate response subjected to blast loading, and the empirical result performed by other researchers will be taken as a reference. Based on selected references, a small number of assumptions lead to the developed Single Degree of Freedom (SDOF) idealised models. This paper provides an analytical prediction for the RHA plate response using SDOF in one dimension (1D) approach. The analytical capability was subsequently verified using the non-linear fluid structure interaction (FSI) numerical simulation and the AUTODYN computer code. The midpoint deflections of the RHA plate were taken as the figure of merit. Based on the small error percentage and the support of strong analytical arguments, the second order SDOF analytical approach and numerical simulation using the AUTODYN computer code can be employed as a method of analysis.

scholarly journals Investigation of straightforward impedance eduction method on single-degree-of-freedom acoustic liners

2018 ◽  
Vol 31 (12) ◽  
pp. 2221-2233 ◽  
Author(s):  
Xianghai QIU ◽  
Bo XIN ◽  
Long WU ◽  
Yang MENG ◽  
Xiaodong JING
Keyword(s):  
Degree Of Freedom ◽  
Single Degree Of Freedom ◽  
Acoustic Liners ◽  
Single Degree

Kinematic comparison of single degree-of-freedom robotic gait trainers

2021 ◽  
Vol 159 ◽  
pp. 104258
Author(s):  
Jeonghwan Lee ◽  
Lailu Li ◽  
Sung Yul Shin ◽  
Ashish D. Deshpande ◽  
James Sulzer
Keyword(s):  
Degree Of Freedom ◽  
Single Degree Of Freedom ◽  
Single Degree ◽  
Robotic Gait
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