Strain Measurements on ACSR Conductors During Fatigue Tests I—Experimental Method and Data

Lévesque, Fréedéric; Goudreau, S.; Cardou, A.; Cloutier, L.

doi:10.1109/tpwrd.2010.2060370

Cited by 30 publications

(30 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The test bench was previously described in [9] and [10]. Four conductor specimens were tested: three Drake and one Bersfort, whose geometrical and mechanical properties are presented in Table I.…”

Section: Experimental Programmentioning

confidence: 99%

“…Goudreau et al [23] analysed the Lévesque et al [10] strain measurements of two typical "short metal-metal suspension clamp-conductor" systems; such systems are quite different from square-faced bushing. The suspension clamp have a curved groove which is supporting the conductor when the latter is bending due to transversal vibration; in fact, the effective LPC moves back and forth on the groove circular arc around the static LPC.…”

Section: E Localization Of Fretting Marksmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Study of Dynamic Bending Stiffness of ACSR Overhead Conductors

Levesque

Goudreau

Langlois

et al. 2015

IEEE Trans. Power Delivery

Self Cite

View full text Add to dashboard Cite

Abstract-Aeolian vibrations of transmission line conductors may cause fretting fatigue failure at or near the location of clamped devices. At these locations, the bending stiffness variation of the conductor has a large influence on its deformed shape and hence on its fatigue mechanics. Variable bending stiffness models could be integrated in non-linear finite element programs to obtain better mechanical behaviour predictions. However, there is very little data available in the literature to validate such numerical models. The objective of this paper is to present experimental data for the deformed shape of two types of ACSR conductors undergoing vibrations. The tests were performed on a 5.83 m test bench for various tensions, displacement amplitudes and frequencies. The displacement amplitude was measured at the vibration anti-node and at five locations near the squarefaced bushing. The results suggest a large stiffness variation near the bushing. This experimental study provides valuable data to compare with a numerical model of a vibrating conductor that includes variable bending stiffness.

show abstract

Section: Experimental Programmentioning

confidence: 99%

Section: E Localization Of Fretting Marksmentioning

confidence: 99%

Experimental Study of Dynamic Bending Stiffness of ACSR Overhead Conductors

Levesque

Goudreau

Langlois

et al. 2015

IEEE Trans. Power Delivery

Self Cite

View full text Add to dashboard Cite

show abstract

“…The numerical model of a clamp/conductor system developed by LALONDE [3] takes into account inter-wire and clamp wire contacts in a stranded conductor and thus provides a more realistic description of the local loading state. Also, it has been shown, based on the experimental results of LÉVESQUE tests [4], that this numerical approach is capable of evaluating the state of local solicitation in terms of stress and strain at any point of the conductor, which consequently makes it possible to locate the critical zones that are susceptible to failure. At the local scale, experimental tests on individual wires are complementary to standard fatigue tests on conductors for characterization of fretting fatigue damages.…”

Section: Introductionmentioning

confidence: 99%

Fatigue strength evaluation for individual strands of overhead conductors using a biaxial fretting fatigue test bench

et al. 2019

View full text Add to dashboard Cite

This paper presents a biaxial fretting fatigue test bench which provides the capability of performing fretting fatigue experiments on individual wires of a conductor combining the effect of both alternating tension and bending loadings to represent a more realistic state of a conductor individual strand under periodic loading caused by aeolian vibrations. Preliminary tests with only uniaxial alternating tension loading were carried out on 1350-H19 aluminum wires having the same mechanical and geometric characteristics as those of the ACSR Bersfort conductor aluminum strands. Different levels of alternating stress were tested in order to validate the performance of the apparatus. Preliminary results showed that the experimental setup allows reproducing the local loading state which leads to the fretting fatigue damage on the tested wires. Biaxial tests were also conducted at a high level of alternating loadings. The results of these tests reveals that, at high alternating stress amplitudes, the biaxial loading allows to observe some fretting fatigue failures, whereas early plain fatigue failures were observed when applying similar uniaxial loading.

show abstract

“…Most transmission lines exist in external, meteorologically unprotected areas and are thus exposed to the natural environment and the associated potential for damage. Vortex‐shedding‐induced vibration (i.e., Aeolian vibration) is observed when the cylindrical conductor is exposed to the wind . Long‐term vibration often leads to conductor damage at the point of clamped contact .…”

Section: Introductionmentioning

confidence: 99%

“…Vortex-shedding-induced vibration (i.e., Aeolian vibration) is observed when the cylindrical conductor is exposed to the wind. [1] Long-term vibration often leads to conductor damage at the point of clamped contact. [2,3] To prevent conductor damage via Aeolian vibration, a Stockbridge damper is mounted on the conductor to suppress its vibrations at the natural frequencies.…”

Section: Introductionmentioning

confidence: 99%

Design of a wireless vibration metre for conductor vibration monitoring

Zhao

Huang

Zhao

et al. 2018

Struct Control Health Monit

View full text Add to dashboard Cite

Summary We present a vibration metre for conductor vibration measurement that is highly accurate due to its robustness against interference from the electromagnetic environment. According to the range of load currents in the transmission line, a power supply module based on induction charging is designed for the vibration metre. The module is composed of three parts: the mutual inductor obtains electrical energy from the transmission line based on the electromagnetic induction principle, the power controller manages the charging and discharging of a lithium battery, and the lithium battery supplies power to all modules and sensors. A cantilever beam displacement sensor is used to measure the vibration amplitude of the conductor. Moreover, a calibration method based on two‐dimensional regression is proposed to address the linear variation of the sensor output due to frequency variations. The corresponding test platform for power supply and accuracy is established, and the experiments verify the feasibility and accuracy of the vibration metre. Furthermore, the vibration metre is tested on a conductor spanning 105 m at Xi'an Polytechnic University. The test data show the number of amplitudes appearing at different frequencies within 10 days, which indicates the characteristics of vibration during this time.

show abstract

Strain Measurements on ACSR Conductors During Fatigue Tests I—Experimental Method and Data

Cited by 30 publications

References 14 publications

Experimental Study of Dynamic Bending Stiffness of ACSR Overhead Conductors

Experimental Study of Dynamic Bending Stiffness of ACSR Overhead Conductors

Fatigue strength evaluation for individual strands of overhead conductors using a biaxial fretting fatigue test bench

Design of a wireless vibration metre for conductor vibration monitoring

Contact Info

Product

Resources

About