Time domain Fluidlastic® lag damper modeling

Edward Smith, George A. Lesieutre, Joseph T. Szefi, Conor Marr

Research output: Contribution to journalArticle

Abstract

To accurately predict Fluidlastic® lead-lag damper behavior, a nonlinear model is developed. Expanding on previously developed linear models, this model attempts to capture the nonlinear behavior of a Fluidlastic® damper through the addition of nonlinear terms to both the stiffness and damping terms in the model. Comparisons of experimental data to the linear modeling approach demonstrate the linear model's failure to capture high frequency and high displacement behavior. Using a simulated annealing optimization routine and experimental storage and loss moduli, the parameters of the nonlinear model were characterized. The characterized nonlinear model demonstrates the ability to accurately predict trends in both frequency and displacement for both the storage and loss moduli over a frequency range of 0.015 Hz to 15 Hz and a displacement range from 0.005 inches to 0.5 inches. The model is also able to predict the high frequency (1Hz - 15 Hz) nonlinearities with displacement with a maximum percent error of 13% for storage modulus and 36% for loss modulus in the 3.6 - 15 Hz frequency range. Hysteresis loop comparison with experimental data additionally reveals the model's ability to capture the nonlinear behavior of the damper in the time domain.

Original languageEnglish (US)
Pages (from-to)1964-1973
Number of pages10
JournalAnnual Forum Proceedings - AHS International
VolumeIII
StatePublished - 2006

Fingerprint

Hysteresis loops
Simulated annealing
Lead
Damping
Elastic moduli
Stiffness

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

@article{eb9ff11554a841f58d7ca5d66d657402,
title = "Time domain Fluidlastic{\circledR} lag damper modeling",
abstract = "To accurately predict Fluidlastic{\circledR} lead-lag damper behavior, a nonlinear model is developed. Expanding on previously developed linear models, this model attempts to capture the nonlinear behavior of a Fluidlastic{\circledR} damper through the addition of nonlinear terms to both the stiffness and damping terms in the model. Comparisons of experimental data to the linear modeling approach demonstrate the linear model's failure to capture high frequency and high displacement behavior. Using a simulated annealing optimization routine and experimental storage and loss moduli, the parameters of the nonlinear model were characterized. The characterized nonlinear model demonstrates the ability to accurately predict trends in both frequency and displacement for both the storage and loss moduli over a frequency range of 0.015 Hz to 15 Hz and a displacement range from 0.005 inches to 0.5 inches. The model is also able to predict the high frequency (1Hz - 15 Hz) nonlinearities with displacement with a maximum percent error of 13{\%} for storage modulus and 36{\%} for loss modulus in the 3.6 - 15 Hz frequency range. Hysteresis loop comparison with experimental data additionally reveals the model's ability to capture the nonlinear behavior of the damper in the time domain.",
author = "Edward Smith and Lesieutre, {George A.} and Szefi, {Joseph T.} and Conor Marr",
year = "2006",
language = "English (US)",
volume = "III",
pages = "1964--1973",
journal = "Annual Forum Proceedings - AHS International",
issn = "1552-2938",
publisher = "American Helicopter Society",

}

Time domain Fluidlastic® lag damper modeling. / Smith, Edward; Lesieutre, George A.; Szefi, Joseph T.; Marr, Conor.

In: Annual Forum Proceedings - AHS International, Vol. III, 2006, p. 1964-1973.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Time domain Fluidlastic® lag damper modeling

AU - Smith, Edward

AU - Lesieutre, George A.

AU - Szefi, Joseph T.

AU - Marr, Conor

PY - 2006

Y1 - 2006

N2 - To accurately predict Fluidlastic® lead-lag damper behavior, a nonlinear model is developed. Expanding on previously developed linear models, this model attempts to capture the nonlinear behavior of a Fluidlastic® damper through the addition of nonlinear terms to both the stiffness and damping terms in the model. Comparisons of experimental data to the linear modeling approach demonstrate the linear model's failure to capture high frequency and high displacement behavior. Using a simulated annealing optimization routine and experimental storage and loss moduli, the parameters of the nonlinear model were characterized. The characterized nonlinear model demonstrates the ability to accurately predict trends in both frequency and displacement for both the storage and loss moduli over a frequency range of 0.015 Hz to 15 Hz and a displacement range from 0.005 inches to 0.5 inches. The model is also able to predict the high frequency (1Hz - 15 Hz) nonlinearities with displacement with a maximum percent error of 13% for storage modulus and 36% for loss modulus in the 3.6 - 15 Hz frequency range. Hysteresis loop comparison with experimental data additionally reveals the model's ability to capture the nonlinear behavior of the damper in the time domain.

AB - To accurately predict Fluidlastic® lead-lag damper behavior, a nonlinear model is developed. Expanding on previously developed linear models, this model attempts to capture the nonlinear behavior of a Fluidlastic® damper through the addition of nonlinear terms to both the stiffness and damping terms in the model. Comparisons of experimental data to the linear modeling approach demonstrate the linear model's failure to capture high frequency and high displacement behavior. Using a simulated annealing optimization routine and experimental storage and loss moduli, the parameters of the nonlinear model were characterized. The characterized nonlinear model demonstrates the ability to accurately predict trends in both frequency and displacement for both the storage and loss moduli over a frequency range of 0.015 Hz to 15 Hz and a displacement range from 0.005 inches to 0.5 inches. The model is also able to predict the high frequency (1Hz - 15 Hz) nonlinearities with displacement with a maximum percent error of 13% for storage modulus and 36% for loss modulus in the 3.6 - 15 Hz frequency range. Hysteresis loop comparison with experimental data additionally reveals the model's ability to capture the nonlinear behavior of the damper in the time domain.

UR - http://www.scopus.com/inward/record.url?scp=33748458426&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33748458426&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:33748458426

VL - III

SP - 1964

EP - 1973

JO - Annual Forum Proceedings - AHS International

JF - Annual Forum Proceedings - AHS International

SN - 1552-2938

ER -