Experimental validation of numerical structural dynamic models for metal plate joining techniques

Joined structures are of great industrial relevance. The dynamic effects of joints are, however, often practically difficult to accurately account for in numerical models, as they often lead to local changes in stiffness and damping. This paper discusses the comparison between measurements and simulations of joined panels considering four different joining techniques: adhesive bonding, metal inert gas welding, resistance spot welding and flow drill screwing. An experimental modal analysis is performed on the different systems and the power injection method is applied to determine the loss factors of single plate systems and their joined counterparts. The joined panels are modeled in a holistic simulation environment with particular focus on the joining region, by the application of predefined and generic joint models. A very good agreement is obtained between the simulated dynamic behavior and the experimental results, showing that an accurate representation of the joints has been obtained.

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Structural Dynamic Models of a Controlled Rectifier

Elektrichestvo ◽

10.24160/0013-5380-2020-6-31-38 ◽

2020 ◽

Vol 6 (6) ◽

pp. 31-38

Author(s):

Gennady A. BELOV ◽

Keyword(s):

Dynamic Models ◽

Structural Dynamic

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Updating structural dynamic models with emphasis on the damping properties

AIAA Journal ◽

10.2514/3.13938 ◽

1998 ◽

Vol 36 ◽

pp. 1094-1099

Author(s):

Amar T. Chouaki ◽

Pierre Ladeveze ◽

Laurent Proslier

Keyword(s):

Dynamic Models ◽

Damping Properties ◽

Structural Dynamic

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Some remarks on random eigenvalues and structural dynamic models

10.2514/6.1991-744 ◽

1991 ◽

Author(s):

HAYM BENAROYA

Keyword(s):

Dynamic Models ◽

Structural Dynamic ◽

Random Eigenvalues

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Updating Structural Dynamic Models with Emphasis on the Damping Properties

AIAA Journal ◽

10.2514/2.486 ◽

1998 ◽

Vol 36 (6) ◽

pp. 1094-1099 ◽

Cited By ~ 26

Author(s):

Amar T. Chouaki ◽

Pierre Ladeveze ◽

Laurent Proslier

Keyword(s):

Dynamic Models ◽

Damping Properties ◽

Structural Dynamic

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Modeling of Spray Combustion with a Steady Laminar Flamelet Model in an Aeroengine Combustion Chamber Based on OpenFOAM

International Journal of Aerospace Engineering ◽

10.1155/2018/7329564 ◽

2018 ◽

Vol 2018 ◽

pp. 1-13

Author(s):

Yinli Xiao ◽

Zupeng Wang ◽

Zhengxin Lai ◽

Wenyan Song

Keyword(s):

Combustion Chamber ◽

High Performance ◽

Numerical Models ◽

Spray Combustion ◽

Combustion Chambers ◽

Flamelet Model ◽

Steady Laminar ◽

Good Agreement ◽

Laminar Flamelet ◽

Laminar Flamelet Model

The development of high-performance aeroengine combustion chambers strongly depends on the accuracy and reliability of efficient numerical models. In the present work, a reacting solver with a steady laminar flamelet model and spray model has been developed in OpenFOAM and the solver details are presented. The solver is firstly validated by Sandia/ETH-Zurich flames. Furthermore, it is used to simulate nonpremixed kerosene/air spray combustion in an aeroengine combustion chamber with the RANS method. A comparison with available experimental data shows good agreement and validates the capability of the new developed solver in OpenFOAM.

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Study on Surface Roughness Muring Metal Manufacturing Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.325.731 ◽

2011 ◽

Vol 325 ◽

pp. 731-736

Author(s):

Zheng Yi Jiang ◽

Shu Jun Wang ◽

Dong Bin Wei ◽

Hei Jie Li ◽

Hai Bo Xie ◽

...

Keyword(s):

Surface Roughness ◽

Crack Nucleation ◽

Metal Plate ◽

Experimental Result ◽

Strip Rolling ◽

Surface Asperity ◽

Asperity Flattening ◽

Cold Strip Rolling ◽

Effect Of Surface ◽

Good Agreement

In the paper, a crystal plasticity finite element method (CPFEM) model was developed based on ABAQUS to analyse the surface roughness transfer during metal manufacturing. The simulation result shows a good agreement with the experimental result in the flattening of surface asperity, and the surface roughness decreases significantly with an increase of reduction with considering friction effect. Lubrication can delay surface asperity flattening. The effect of surface roughness on produced metal defect (crack) was also studied, and the surface roughness affects the crack initiation significantly in cold strip rolling. In addition, the surface roughness variation along the metal plate width contributes to stress distribution and then inhibition of crack nucleation.

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Long-term thermal two- and three-dimensional analysis of roller compacted concrete dams supported by monitoring verification

Canadian Journal of Civil Engineering ◽

10.1139/l10-004 ◽

2010 ◽

Vol 37 (4) ◽

pp. 600-610 ◽

Cited By ~ 5

Author(s):

Vladan Kuzmanovic ◽

Ljubodrag Savic ◽

John Stefanakos

Keyword(s):

Thermal Analysis ◽

Boundary Conditions ◽

Thermal Field ◽

Numerical Models ◽

Three Dimensional ◽

Roller Compacted Concrete ◽

Rcc Dam ◽

Field Investigations ◽

Good Agreement

This paper presents two-dimensional (2D) and three-dimensional (3D) numerical models for unsteady phased thermal analysis of RCC dams. The time evolution of a thermal field has been modeled using the actual dam shape, RCC technology and the adequate description of material properties. Model calibration and verification has been done based on the field investigations of the Platanovryssi dam, the highest RCC dam in Europe. The results of a long-term thermal analysis, with actual initial and boundary conditions, have shown a good agreement with the observed temperatures. The influence of relevant parameters on the thermal field of RCC dams has been analyzed. It is concluded that the 2D model is appropriate for the thermal phased analysis, and that the boundary conditions and the mixture properties are the most influential on the RCC dam thermal behavior.

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Modular crawling robots using soft pneumatic actuators

Frontiers of Mechanical Engineering ◽

10.1007/s11465-020-0605-3 ◽

2020 ◽

Author(s):

Nianfeng Wang ◽

Bicheng Chen ◽

Xiandong Ge ◽

Xianmin Zhang ◽

Wenbin Wang

Keyword(s):

3D Printing ◽

Numerical Models ◽

Pneumatic Actuators ◽

Axial Elongation ◽

Control Schemes ◽

Good Agreement

AbstractCrawling robots have elicited much attention in recent years due to their stable and efficient locomotion. In this work, several crawling robots are developed using two types of soft pneumatic actuators (SPAs), namely, an axial elongation SPA and a dual bending SPA. By constraining the deformation of the elastomeric chamber, the SPAs realize their prescribed motions, and the deformations subjected to pressures are characterized with numerical models. Experiments are performed for verification, and the results show good agreement. The SPAs are fabricated by casting and developed into crawling robots with 3D-printing connectors. Control schemes are presented, and crawling tests are performed. The speeds predicted by the numerical models agree well with the speeds in the experiments.

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Identification of Viscously Damped Distributed Structural Dynamic Systems

13th Biennial Conference on Mechanical Vibration and Noise: Modal Analysis, Modeling, Diagnostics, and Control — Analytical and Experimental ◽

10.1115/detc1991-0365 ◽

1991 ◽

Author(s):

R. Chander ◽

M. Meyyappa ◽

S. Hanagud

Keyword(s):

Dynamic Systems ◽

Beam Theory ◽

Continuous Functions ◽

Model Parameters ◽

Unknown Parameters ◽

Structural Dynamic ◽

Domain Identification ◽

Forcing Function ◽

Cardinal Splines ◽

Stiffness And Damping

Abstract A frequency domain identification technique applicable to damped distributed structural dynamic systems is presented. The technique is developed for beams whose behavior can be modeled using the Euler-Bernoulli beam theory. External damping of the system is included by means of a linear viscous damping model. Parameters to be identified, mass, stiffness and damping distributions are assumed to be continuous functions over the beam. The response at a discrete number of points along the length of the beam for a given forcing function is used as the data for identification. The identification scheme involves approximating the infinite dimensional response and parameter spaces by using quintic B-splines and cubic cardinal splines, respectively. A Galerkin type weighted residual procedure, in conjunction with the least squares technique, is employed to determine the unknown parameters. Numerically simulated response data for an applied impulse load are utilized to validate the developed technique. Estimated values for the mass, stiffness and damping distributions are discussed.

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