scholarly journals Calibration and validation of the dynamic response of two slab track models using data from a full-scale test rig

2021 ◽  
Vol 234 ◽  
pp. 111980
Author(s):  
Jannik S. Theyssen ◽  
Emil Aggestam ◽  
Shengyang Zhu ◽  
Jens C.O. Nielsen ◽  
Astrid Pieringer ◽  
...  
Keyword(s):  
Dynamic Response ◽  
Full Scale ◽  
Full Scale Test ◽  
Test Rig ◽  
Slab Track ◽  
Calibration And Validation ◽  
Scale Test ◽  
Using Data

Simulated Drilling Testing of an Active Wellbore Sealing System on a Full-Scale Test Rig

2019 ◽  
Author(s):  
Austin Johnson ◽  
Jess Nichols ◽  
Kareem Ameen ◽  
Justin Fraczek
Keyword(s):  
Full Scale ◽  
Full Scale Test ◽  
Test Rig ◽  
Scale Test

scholarly journals Unbalance Compensation of a Full Scale Test Rig Designed for HTR-10GT: A Frequency-Domain Approach Based on Iterative Learning Control

2017 ◽  
Vol 2017 ◽  
pp. 1-15 ◽  
Author(s):  
Ying He ◽  
Lei Shi ◽  
Zhengang Shi ◽  
Zhe Sun
Keyword(s):  
Frequency Domain ◽  
Iterative Learning Control ◽  
Learning Control ◽  
Magnetic Bearing ◽  
Iterative Learning ◽  
Full Scale ◽  
Full Scale Test ◽  
Test Rig ◽  
Operation Speed ◽  
Scale Test

Unbalance vibrations are crucial problems in heavy rotational machinery, especially for the systems with high operation speed, like turbine machinery. For the program of 10 MW High Temperature gas-cooled Reactor with direct Gas-Turbine cycle (HTR-10GT), the rated operation speed of the turbine system is 15000 RPM which is beyond the second bending frequency. In that case, even a small residual mass will lead to large unbalance vibrations. Thus, it is of great significance to study balancing methods for the system. As the turbine rotor is designed to be suspended by active magnetic bearings (AMBs), unbalance compensation could be achieved by adequate control strategies. In the paper, unbalance compensation for the Multi-Input and Multi-Output (MIMO) active magnetic bearing (AMB) system using frequency-domain iterative learning control (ILC) is analyzed. Based on the analysis, an ILC controller for unbalance compensation of the full scale test rig, which is designed for the rotor and AMBs in HTR-10GT, is designed. Simulation results are reported which show the efficiency of the ILC controller for attenuating the unbalance vibration of the full scale test rig. This research can offer valuable design criterion for unbalance compensation of the turbine machinery in HTR-10GT.

Experimental study on dynamic performance of typical nonballasted track systems using a full-scale test rig

2016 ◽  
Vol 231 (4) ◽  
pp. 470-481 ◽  
Author(s):  
Mingze Wang ◽  
Chengbiao Cai ◽  
Shengyang Zhu ◽  
Wanming Zhai
Keyword(s):  
Experimental Study ◽  
Dynamic Stiffness ◽  
Dynamic Performance ◽  
Full Scale ◽  
Damping Coefficient ◽  
Full Scale Test ◽  
Test Rig ◽  
Scale Test ◽  
Stiffness And Damping Coefficient ◽  
Stiffness And Damping

This paper presents an experimental study on dynamic performance of China Railway Track System (CRTS) series track systems using a full-scale test rig. The test rig has been constructed based on 55.17 m long full-scale nonballasted tracks composed of four typical CRTS track elements in high-speed railways. First, the dynamic characteristics of different nonballasted tracks are investigated by conducting wheel-drop tests, where a wheel-drop testing vehicle with a dropping wheelset is devised to provide the wheel-drop load. The vibration levels of different track systems are assessed by the root-mean-square acceleration per one-third octave band, and the vibration transmission characteristics of the CRTS series tracks are evaluated by transfer functions. Further, a mathematical track model is used to extract the dynamic stiffness and damping coefficient of the four types of nonballasted track systems based on the wheel–rail impact response. The vibration characteristics, the dynamic stiffness, and damping coefficient of different nonballasted track systems under various wheel-drop heights are compared and discussed in detail.

A full scale test rig for assessment of abrasive wear of shackle chains

Wear ◽  
2013 ◽  
Vol 302 (1-2) ◽  
pp. 1017-1025 ◽  
Author(s):  
J. De Pauw ◽  
P. De Baets ◽  
Y. Perez Delgado ◽  
J. Sukumaran ◽  
W. Ost
Keyword(s):  
Abrasive Wear ◽  
Full Scale ◽  
Full Scale Test ◽  
Test Rig ◽  
Scale Test

scholarly journals Wheel wear performance assessment and model validation using Harold full scale test rig

2021 ◽  
pp. 095440972110224
Author(s):  
Pelin Boyacioglu ◽  
Adam Bevan ◽  
Paul Allen ◽  
Barnaby Bryce ◽  
Sam Foulkes
Keyword(s):  
Vehicle Dynamics ◽  
Full Scale ◽  
Full Scale Test ◽  
Test Rig ◽  
Wheel Wear ◽  
Wear Model ◽  
Novel Technologies ◽  
Railway Industry ◽  
Scale Test ◽  
Dynamics Simulations

The railway industry has focused on the improvement of maintenance through the use of novel technologies. Recently, the utilisation of repair welding to restore the worn area on wheels has been investigated, as it can bring significant savings in wheelset maintenance. Under an Innovate UK AURORA project, a worn wheel that previously operated on London Underground (LUL) was restored using this process. To test its performance and compare with a new standard steel grade wheel, the HAROLD full scale test rig was used in which an LUL vehicle bogie equipped with both the restored and R9 grade wheels was operated under the representative lateral and yaw displacements computed from vehicle dynamics simulations. The wear measurements carried out at the end of test cycles showed that although the restored wheel suffered from initial higher wear, the levels reduced and became similar to the R9 grade wheel. Furthermore, the full-scale testing provided an opportunity to validate the wear model predictions which were conducted using the vehicle dynamics simulations utilised in testing inputs. It was found that while the flange wear predictions were higher, the tread wear estimations were smaller than the measurements on the R9 grade wheel.

Full-Scale Test on Coupled Thermo-Hydro-Mechanical Processes in Engineered Barrier System

1994 ◽  
Vol 1 (1) ◽  
pp. 77-83
Author(s):  
Yoshiji Moro ◽  
Tomoo Fujita ◽  
Takeshi Kanno ◽  
Akira Kobayashi
Keyword(s):  
Full Scale ◽  
Full Scale Test ◽  
Scale Test ◽  
Engineered Barrier
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