Effect of transfer function uncertainty on short-term ship responses

Soares, C. Guedes

doi:10.1016/0029-8018(91)90018-l

Cited by 42 publications

(8 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Three uncertainty measures are used in this study. First, the Frequency Independent Model Error FIME proposed by Guedes Soares [71] with the associated coefficient of determination CoD. The total difference measure TD M proposed by Kim and Kim [66] is then evaluated.…”

Section: Uncertainty Measuresmentioning

confidence: 99%

“…The relationship between calculated H and measured Ĥ transfer functions at each encounter frequency ω i was observed by Guedes Soares [71] to describe various common scenarios as follows:…”

Section: Frequency-independent Model Errormentioning

confidence: 99%

“…Numerous methods have been developed for quantifying the model uncertainty of transfer functions. Guedes Soares [71] introduced the frequency-independent model error (FIME) to assess the systematic bias between measurements and predictions of waveinduced responses. Jafaryeganeh et al [72] used the linear frequency-dependent model error presented by Guedes Soares [71] to investigate the uncertainties in wave-induced bending moment transfer functions derived by a three-dimensional linear panel method.…”

Section: Introductionmentioning

confidence: 99%

“…Guedes Soares [71] proposed estimating uncertainty based on the integration of the area under the response spectrum to represent the shape of the transfer function and the wave spectrum as well as the relative position between their peaks which eliminates individual frequency sensitivity in transfer functions. Ando [73] predicted the total factored error (TFE) between observed and predicted responses by weighting the error of the predicted transfer function at a specific wave frequency based on its significance in the wave spectrum.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A New Model Uncertainty Measure of Wave-Induced Motions and Loads on a Container Ship with Forward Speed

Abdelwahab

Wang

Parunov

et al. 2023

JMSE

Self Cite

View full text Add to dashboard Cite

A new uncertainty quantifier is presented for linear transfer functions of wave-induced ship motions and loads obtained by various seakeeping codes. The numerical simulations are conducted for the high-speed Flokstra container ship in regular waves at various heading angles, and the results are compared with existing experimental data. The study employs five numerical codes that are based on three different seakeeping theories, namely strip theory, 3D frequency-domain method, and 3D time-domain method. Multiple measures are applied to quantify the uncertainty in the calculated transfer functions, such as frequency-independent model error, coefficient of determination, and the total difference. In addition, a new measure of uncertainty, termed modified total difference, is proposed for determining the uncertainty of individual seakeeping codes based on experimental data rather than the mean of results obtained by numerical codes. Results show that the uncertainty measures can identify differences between the codes. The predicted wave-induced loads have higher uncertainties compared to motions. The uncertainty assessment shows that none of the applied codes can produce accurate estimates for all wave-induced motions and loads at all heading angles at the same time.

show abstract

Section: Uncertainty Measuresmentioning

confidence: 99%

Section: Frequency-independent Model Errormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A New Model Uncertainty Measure of Wave-Induced Motions and Loads on a Container Ship with Forward Speed

Abdelwahab

Wang

Parunov

et al. 2023

JMSE

Self Cite

View full text Add to dashboard Cite

show abstract

“…The uncertain variables are considered normally distributed. Other sources of uncertainties not due to weather conditions are, for instance, model uncertainties in the estimation of ship responses [17][18][19], but also related to the attitude of the shipmaster and the engine control strategy adopted [20][21][22].…”

Section: Probabilistic Approachmentioning

confidence: 99%

A Comprehensive Approach to Account for Weather Uncertainties in Ship Route Optimization

Vettor

Bergamini

Soares

2021

JMSE

Self Cite

View full text Add to dashboard Cite

This work aims at defining in a probabilistic manner objectives and constraints typically considered in route optimization systems. Information about weather-related uncertainties is introduced by adopting ensemble forecast results. Classical reliability methods commonly used in structural analysis are adopted, allowing to achieve a simple yet effective evaluation of the probability of failure and the variability associated with the predicted fuel consumption and time of arrival. A quantitative example of application is provided, taking into consideration one of the main North Atlantic routes.

show abstract

References

2017

Handbook of Structural Life Assessment

View full text Add to dashboard Cite

Effect of transfer function uncertainty on short-term ship responses

Cited by 42 publications

References 12 publications

A New Model Uncertainty Measure of Wave-Induced Motions and Loads on a Container Ship with Forward Speed

A New Model Uncertainty Measure of Wave-Induced Motions and Loads on a Container Ship with Forward Speed

A Comprehensive Approach to Account for Weather Uncertainties in Ship Route Optimization

References

Contact Info

Product

Resources

About