scholarly journals Static and Dynamic Response of a Carbon Composite Full-scale Hydrofoil Manufactured using Automated Fibre Placement

2021 ◽  
pp. 100218
Author(s):  
Phyo Thu Maung ◽  
B. Gangadhara Prusty ◽  
Md Shamsuddoha ◽  
Andrew W. Phillips ◽  
Nigel A. St John
Keyword(s):  
Dynamic Response ◽  
Carbon Composite ◽  
Full Scale

Numerical Investigation on the Plastic Response of a Small-Scale Laterally Impacted Tanker Double Hull Structure

2012 ◽  
Author(s):  
Richard Villavicencio ◽  
Young-Hun Kim ◽  
Sang-Rai Cho ◽  
C. Guedes Soares
Keyword(s):  
Dynamic Response ◽  
Strain Rate ◽  
Scaling Laws ◽  
Full Scale ◽  
Scale Model ◽  
Small Scale ◽  
Plastic Response ◽  
Hull Structure ◽  
Double Hull ◽  
The Impact

Numerical simulations are presented, on the dynamic response of a one-tenth scaled tanker double hull structure struck laterally by a knife edge indenter. The small stiffeners of the full-scale prototype are smeared in the small-scale model by increasing the thicknesses of the corresponding plates. The dynamic response is evaluated at an impact velocity of 7.22 m/s and the impact point is chosen between two frames to assure damage to the outer shell plating and stringers. The simulations are performed by LS-DYNA finite element solver. They aim at evaluating the influence of strain hardening and strain rate hardening on the global impact response of the structure, following different models proposed in the literature. Moreover, the numerical model is scaled to its full-scale prototype, summarizing the governing scaling laws for collision analysis and evaluating the effect of the material strain rate on the plastic response of large scaled numerical models.

Behavior of Full-Scale Model Cask Under 9m Drop Test and Simulation

2006 ◽  
Author(s):  
Kiminobu Hojo ◽  
Tadashi Kimura ◽  
Akio Kitada ◽  
Hiroshi Tamaki ◽  
Junich Kishimoto ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Dynamic Response ◽  
Nuclear Power ◽  
Simulation Method ◽  
Full Scale ◽  
Drop Test ◽  
Scale Model ◽  
Test Facility ◽  
Spent Fuel ◽  
Federal Institute

The nuclear spent fuel transport and storage cask is used for transport of the spent fuel from a nuclear power station to an intermediate storage facility. Leak tightness and subcriticality on transportation required from IAEA TS-R1 [1] have to be assured by a 9m drop test and its numerical simulation. This paper describes the drop test using a full-scale prototype test cask. The test was conducted by German Federal Institute for Materials Research and Testing (BAM) at their test facility in Horstwalde, Germany and comparison of the test result with the “MH1 (Mitsubishi Heavy Industries, Ltd.)” numerical simulation using LS-DYNA code. The drop orientations of the tests were slap down and vertical. From the drop test the following is demonstrated: • The leak rate of He gas after the drop tests satisfied the IAEA’s criteria. • The numerical simulation which modeled the cask body enabled dynamic response such as acceleration and strain of the cask body. This means the simulation method qualified the relation of dynamic response of the cask body and leakage behavior.

Field Testing and Dynamic Response of Full-Scale GFRP-Reinforced Concrete Guideway under Monorail Train

2021 ◽  
Vol 26 (9) ◽  
pp. 04021061
Author(s):  
Nikolaus Wootton ◽  
Amir Fam ◽  
Mark Green ◽  
Akram Jawdhari ◽  
Salah Sarhat
Keyword(s):  
Reinforced Concrete ◽  
Dynamic Response ◽  
Field Testing ◽  
Full Scale

Characterizing the Influence of Abstraction in Full-Scale Wind Turbine Nacelle Testing

2016 ◽  
Author(s):  
Ryan Schkoda ◽  
Amin Bibo ◽  
Yi Guo ◽  
Scott Lambert ◽  
Robb Wallen
Keyword(s):  
Dynamic Response ◽  
Wind Turbine ◽  
Case Studies ◽  
Individual Component ◽  
Test Bench ◽  
Full Scale ◽  
Main Shaft ◽  
Main Bearing ◽  
Component Testing ◽  
Yaw Bearing

In recent years, there has been a growing interest in full-scale wind turbine nacelle testing to complement individual component testing. As a result, several wind turbine nacelle test benches have been built to perform such testing with the intent of loading the integrated components as they are in the field. However, when mounted on a test bench the nacelle is not on the top of a tower and does not have blades attached to it — this is a form of abstraction. This paper aims to quantify the influence of such an abstraction on the dynamic response of the nacelle through a series of simulation case studies. The responses of several nacelle components are studied including the main bearing, main shaft, gearbox supports, generator, and yaw bearing interface. Results are presented to highlight the differences in the dynamic response of the nacelle caused by the abstraction. Additionally, the authors provide recommendations for mitigating the effects of the abstraction.

A dynamic response test rig of a full-scale rotor–journal bearing system

2018 ◽  
Vol 233 (4) ◽  
pp. 649-659
Author(s):  
Qiang Li ◽  
Shuo Zhang ◽  
Yujun Wang ◽  
Weiwei Xu ◽  
Zhenbo Wang
Keyword(s):  
Dynamic Response ◽  
Natural Frequency ◽  
Journal Bearing ◽  
Dynamic Balance ◽  
Journal Bearings ◽  
Full Scale ◽  
Test Rig ◽  
Field Dynamic ◽  
Bearing Structure ◽  
Bearing System

A design strategy of a test rig for the dynamic behavior of a rotor supported by two full-scale journal bearings was proposed. A special part, called “intermediate”, was set up to allow the convenient changing of the bearing structure. An electromagnetic exciter was used to obtain the natural frequency, and software running on the Microsoft Visual C++6.0 operating platform was programmed for signal acquisition and analysis. Then, the test rig was constructed. The field dynamic balance and natural frequency testing were carried out. The journal orbits and frequency spectrums were used to measure the dynamic response of different structure full-scale journal bearings. The experimental results showed that an acceptable balance effect was achieved after the field dynamic balance. The natural frequency of the rig agreed with the numerical results. Stability was improved through changing the bearing structure. This revealed that this rig can effectively test the dynamic behavior of a rotor supported by a full-scale journal bearing system, which is critical to the design of journal bearings.

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