Reduced scale models based on similitude theory: A review up to 2015

Coutinho, Cristiano P.; Baptista, A. Poiares; Rodrigues, J. Dias

doi:10.1016/j.engstruct.2016.04.016

Cited by 169 publications

(80 citation statements)

References 95 publications

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“…The similitude proportionality coefficients, length ( S l ), elastic modulus ( S E ), and acceleration ( S a ), were chosen as the main control coefficients. The remaining coefficients were deduced based on the Buckingham π theorem . The similitude proportionality coefficients are listed in Table .…”

Section: Model Design and Constructionmentioning

confidence: 99%

Dynamic characteristics and seismic response of frame–core tube structures, considering soil–structure interactions

Shen

De-ling

2018

Structural Design Tall Build

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Summary In order to study the dynamic characteristics and seismic response of high‐rise buildings with a frame–core tube structure, while considering the effect of soil–structure interactions (SSIs), a series of shaking table tests were conducted on test models with two foundation types: fixed‐base (FB), in which the superstructure was directly affixed to the shaking table, and SSI, consisting of a superstructure, pile foundation, and soil. To increase the applicability of the model to the dynamic characteristics of real‐world tall buildings, the superstructure of test models was built at a scale of 1/50. This simulated a 41‐floor high‐rise building with a frame–core tube structure. The mode shape, natural frequency, damping ratio, acceleration and displacement response, story shear, and dynamic strain were determined in each of the test models under the excitation of simulated minor, moderate, and large earthquakes. The SSI effect on frame–core tubes was analyzed by comparing the results of the two test models. The results show that the dynamic characteristics and seismic response of the two systems were significantly different. Finally, these results were verified by performing a numerical analysis on the differences in the seismic responses of the FB and SSI numerical models under various simulated seismic conditions.

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Section: Model Design and Constructionmentioning

confidence: 99%

Dynamic characteristics and seismic response of frame–core tube structures, considering soil–structure interactions

Shen

De-ling

2018

Structural Design Tall Build

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“…Extensive experimental tests of full-scale prototypes presents some drawbacks, such as added complexity [3], extended assembling and test time [4], and consequently high cost [5] [6]. Downscale or reduced-scale (RS) modelling and testing allows partially overcoming the abovementioned drawbacks, since this approach offers a simpler and cost-effective solution, which has been successfully applied in different areas such as aeronautics [7], [8], aerodynamics [9], mechanical [10] and electrical engineering [11] or heat transfer [4], [12] among others. The design of reduced-scale tests has been greatly facilitated by the emergence of powerful computers and software [4], which currently have a deep impact on design capabilities and procedures.…”

Section: Introductionmentioning

confidence: 99%

“…Downscale or reduced-scale (RS) modelling and testing allows partially overcoming the abovementioned drawbacks, since this approach offers a simpler and cost-effective solution, which has been successfully applied in different areas such as aeronautics [7], [8], aerodynamics [9], mechanical [10] and electrical engineering [11] or heat transfer [4], [12] among others. The design of reduced-scale tests has been greatly facilitated by the emergence of powerful computers and software [4], which currently have a deep impact on design capabilities and procedures. Reducedscale models are nowadays considered as viable, valuable and essential design tools [7].…”

Section: Introductionmentioning

confidence: 99%

Feasibility analysis of reduced‐scale visual corona tests in high‐voltage laboratories

Abomailek

Riba

Torrens

2019

IET Generation, Transmission & Distribution

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Corona is a critical effect that must be considered during the design and optimization stages of high-voltage hardware such as substation connectors, since due to the harmful effects, corona threats power systems reliability. Visual corona tests allow detecting and identifying the critical corona points on the surface of substation connectors, so corrective actions can be applied for product optimization. This paper focuses on reduced-scale visual corona tests intended to verify and optimize the behaviour of such high-voltage hardware. Reduced-scale visual corona tests allow reducing the voltage to be applied, laboratory size, instrumentation requirements, assembly and test times, and finally the overall costs of the tests compared to standard corona tests carried out in large-size high-voltage laboratories. A hybrid approach combining experimental tests and finite element method (FEM) simulations is presented, which allows obtaining the equivalent visual corona onset voltage between reduced-scale and full-scale tests. Although the paper focuses on the analysis of aluminium substation connectors, the proposed approach can be applied to many other hardware intended for high-voltage applications.

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“…Up to now, there have been a plenty of theoretical studies about similitude design of typical thin-walled plates and shells (Coutinho et al, 2016;De Rosa and Franco, 2015;Meruane et al, 2016), but the ability to predict vibration characteristics of blisks is still missing by using similitude experimental models. In this study, a simplification condition is proposed in order to simplify the determining procedure of scaling laws.…”

Section: Introductionmentioning

confidence: 99%

Prediction of vibration characteristics of blisks using similitude models

Zhang

Wang

Zhai

et al. 2019

Mechanics Based Design of Structures and Machines

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This study investigates the determination approach of distorted scaling laws for predicting the dynamic characteristic of an aero engine's blisk. Based on the dynamic scaling laws of typical thin-walled structures, an assumption of geometrically complete scaling laws is firstly proposed and numerically validated. For distorted models of disk thickness, in order to simplify the design procedure, a simplification condition is proposed and applied to the first 10 orders' distorted scaling laws (blade-dominated vibrations) by combining sensitivity analysis. Next, the 11th-14th orders' distorted scaling laws are determined for disk-dominated vibrations. Numerical validation demonstrates that distorted scaling laws possess a good accuracy. Finally, the applicability of these new scaling laws is validated by the experimental data. The results indicate that, by using the new scaling laws, the simple models can predict vibration characteristics of blisk by employing similitude models.

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Reduced scale models based on similitude theory: A review up to 2015

Cited by 169 publications

References 95 publications

Dynamic characteristics and seismic response of frame–core tube structures, considering soil–structure interactions

Dynamic characteristics and seismic response of frame–core tube structures, considering soil–structure interactions

Feasibility analysis of reduced‐scale visual corona tests in high‐voltage laboratories

Prediction of vibration characteristics of blisks using similitude models

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