Optimization design of corrugated beam guardrail based on RBF-MQ surrogate model and collision safety consideration

Hou, Shujuan; Tan, Wei; Zheng, Yuna; Han, Xu; Li, Qing

doi:10.1016/j.advengsoft.2014.08.002

Cited by 39 publications

(12 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…, mexisting results greater than 1 (8) where, m is the total number of times the experiment has been conducted, EMS i is the mathematical expectation of the mean square error. The equation for the mean square error MS i is shown below [33,34]:…”

Section: Three-level Unreplicated Saturated Factorial Design Methodsmentioning

confidence: 99%

Parameters Studies on Surface Initiated Rolling Contact Fatigue of Turnout Rails by Three-Level Unreplicated Saturated Factorial Design

Wang

et al. 2018

Applied Sciences

View full text Add to dashboard Cite

Surface initiated rolling contact fatigue (RCF), mainly characterized by cracks and material stripping, is a common type of damage to turnout rails, which can not only shorten service life of turnout but also lead to poor running safety of vehicle. The rail surface initiated RCF of turnouts is caused by a long-term accumulation, the size and distribution of which are related to the dynamic parameters of the complicated vehicle-turnout system. In order to simulate the accumulation of rail damage, some random samples of dynamic parameters significantly influencing it should be input. Based on the three-level unreplicated saturated factorial design, according to the evaluation methods of H, P and B statistic values, six dynamic parameters that influence the rail surface initiated RCF in turnouts, namely running speed of vehicle, axle load, wheel-rail profiles, integral vertical track stiffness and wheel-rail friction coefficient, are obtained by selecting 13 dynamic parameters significantly influencing the dynamic vehicle-turnout interaction as the analysis factors, considering four dynamic response results, i.e., the normal wheel-rail contact force, longitudinal creep force, lateral creep force and wheel-rail contact patch area as the observed parameters. In addition, the rail surface initiated RCF behavior in turnouts under different wheel-rail creep conditions is analyzed, considering the relative motion of stock/switch rails. The results show that the rail surface initiated RCF is mainly caused by the tangential stress being high under small creep conditions, the normal and tangential stresses being high under large creep conditions, and the normal stress being high under pure spin creep conditions.

show abstract

Section: Three-level Unreplicated Saturated Factorial Design Methodsmentioning

confidence: 99%

Parameters Studies on Surface Initiated Rolling Contact Fatigue of Turnout Rails by Three-Level Unreplicated Saturated Factorial Design

Wang

et al. 2018

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…Since the neural network model has a strong ability to approximate complex nonlinear functions, the learning speed is fast, has excellent generalization ability, and is highly fault-tolerant. It is used by many scholars and engineers in aircraft wingtips [44], highway traffics [45], turbomachinery [46], engineering optimization [47], compressors [48], gas cyclone separator [49], MMES controllers [50], and many other applications. The relationships between the vibrational sound radiation of the volute casing surface and the volute panel thickness are typically nonlinear.…”

Section: Rbf Approximation Surrogate Models and Validationmentioning

confidence: 99%

Vibroacoustic Optimization Study for the Volute Casing of a Centrifugal Fan

et al. 2019

View full text Add to dashboard Cite

A numerical optimization is presented to reduce the vibrational noise of a centrifugal fan volute. Minimal vibrational radiated sound power was considered as the aim of the optimization. Three separate parts of volute panel thickness (ST: the side panel thickness; BT: the back panel thickness; FT: the front panel thickness) were taken as the design variables. Then, a vibrational noise optimization control method for the volute casing was proposed that considered the influence of vibroacoustic coupling. The optimization method was mainly divided into three main parts. The first was based on the simulation of unsteady flow to the fan to obtain the vibrational noise source. The second used the design of experiments (DoE) method and a weighted-average surrogate model (radial basis function, or RBF) with three design variables related to the geometries of the three-part volute panel thickness, which was used to provide the basic mathematical model for the optimization of the next part. The third part, implementing the low vibrational noise optimization for the fan volute, applied single-objective (taking volute radiated acoustical power as the objective function) and multi-objective (taking the volute radiated acoustical power and volute total mass as the objective function) methods. In addition, the fan aerodynamic performance, volute casing surface fluctuations, and vibration response were validated by experiments, showing good agreement. The optimization results showed that the vibrational noise optimization method proposed in this study can effectively reduce the vibration noise of the fan, obtaining a maximum value of noise reduction of 7.3 dB. The optimization in this study provides an important technical reference for the design of low vibroacoustic volute centrifugal compressors and fans whose fluids should be strictly kept in the system without any leakage.

show abstract

“…The main Contents lists available at ScienceDirect journal homepage: www.elsevier.com/locate/caor advantage of this approach is that the surrogate model has a lower computational complexity than the original model of the problem, thereby significantly reducing the computational cost. Because of this advantage, surrogate models are widely utilized in many fields, such as the optimization of helicopter rotor blades [19], the optimization design of corrugated beam guardrails [20], and the inverse calculation of in situ stress in rock mass [21]. However, selecting the appropriate surrogate model is a challenge because a certain surrogate model cannot be suitable for all kinds of problems [22].…”

Section: Introductionmentioning

confidence: 99%

A novel differential evolution algorithm using local abstract convex underestimate strategy for global optimization

Zhou

Zhang

Xin

et al. 2016

Computers & Operations Research

View full text Add to dashboard Cite

Optimization design of corrugated beam guardrail based on RBF-MQ surrogate model and collision safety consideration

Cited by 39 publications

References 22 publications

Parameters Studies on Surface Initiated Rolling Contact Fatigue of Turnout Rails by Three-Level Unreplicated Saturated Factorial Design

Parameters Studies on Surface Initiated Rolling Contact Fatigue of Turnout Rails by Three-Level Unreplicated Saturated Factorial Design

Vibroacoustic Optimization Study for the Volute Casing of a Centrifugal Fan

A novel differential evolution algorithm using local abstract convex underestimate strategy for global optimization

Contact Info

Product

Resources

About