A two stage method for structural damage detection using a modal strain energy based index and particle swarm optimization

Seyedpoor, S. M.

doi:10.1016/j.ijnonlinmec.2011.07.011

Cited by 235 publications

(122 citation statements)

References 13 publications

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“…In practical measurements vibration data of structures, it is often impossible to avoid the presence of noise in the measurement and it is widely recognized that the natural frequencies are least contaminated by measurement noise and can generally be measured with good accuracy. As it was reported in [22], the frequencies and mode shapes most likely to be contaminated by measurement noise with a standard error of 0.15% and 3% for the modal frequencies and mode shapes, respectively. In this example, the same level of noise for frequency and mode shape is also used for both cases of damage.…”

Section: Cantilevered Beammentioning

confidence: 71%

“…Consequently, we propose nei as a new indicator using strain energy of elements to pinpoint the damage locations. The procedure used to establish the indicator is based on reference [22] in which the modal strain energy is handled as a damage location method. The modal strain energy of an element corresponding to a mode shape can be presented as follows [22] …”

Section: Formulation Of Normalized Energy Index In DLV Methodsmentioning

confidence: 99%

“…Secondly, in order to avoid inaccuracy in damage detection [22], we normalize the dlvse e i with respect to the total strain energy as follows…”

Section: Formulation Of Normalized Energy Index In DLV Methodsmentioning

confidence: 99%

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A new energy indicator in damage locating vector method (DLV) for detecting multiple damaged positions in beam and truss structures

Nguyen-Thoi¹,

Nhan²,

Trung³

et al. 2016

Vietnam J. Mech.

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Abstract. The paper presents a new indicator called normalized energy index (nei) in damage locating vector method (DLV) for detecting multiple damaged positions in beam and truss structures. In the DLV method, a set of load vectors, which is extracted from the change in flexibility matrix between an undamaged structure and a damaged one, is applied as static loads to the undamaged structure which are evaluated via the finite element modeling. Then, the nei values are computed for each element by using the displacements. In order to verify the accuracy and efficiency of a proposed indicator, a cantilevered beam and a 14-bay planar truss are considered.

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Section: Cantilevered Beammentioning

confidence: 71%

Section: Formulation Of Normalized Energy Index In DLV Methodsmentioning

confidence: 99%

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A new energy indicator in damage locating vector method (DLV) for detecting multiple damaged positions in beam and truss structures

Nguyen-Thoi¹,

Nhan²,

Trung³

et al. 2016

Vietnam J. Mech.

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“…Kinetics modeling, including loss factor and nature frequency, is a key issue [3]. In recent years, many researchers have investigated the kinetics parameters of damping structures [4][5][6][7][8]. However, viscoelastic dynamic performance is difficult to precisely predict owing to the complex stiffness matrix of viscoelastic structures.…”

Section: Introductionmentioning

confidence: 99%

Modified Modal Strain Energy Method for Analyzing the Dynamic Damping Behavior of Constrained Viscoelastic Structures

Sun¹,

Wang²,

Li³

et al. 2017

JESTR

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Modal strain energy (MSE) method is an efficient approximation approach for kinetics parameter calculation of constrained viscoelastic structures. MSE fails to determine the precise dynamic behavior of viscoelastic structures when the stiffness matrix is a complex one. To address this issue, this study proposes a new modified MSE method to calculate the loss factor and natural frequency of a constrained viscoelastic structure on the basis of the correlation analysis of the current modal strain method. The modifying factor changed with the amplitude of the modal order loss factor. A prototype system with four parameters, which was equivalent to a viscoelastic sandwich beam or plate, was used to analyze the error between the new modified method and current methods. The proposed method was applied to a viscoelastic suspension. Results show that the proposed method obtains minimum relative errors of 1.2% and 2.3% for structural loss factor and natural frequency as compared with existing methods. This study provides a certain reference for the performance analysis, structural design, and improvement of constrained viscoelastic structures.

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“…And with the fast development of computation, more attention was paid in algorithm these years. Neural network was among the first to be adopted to identified damage [9,10], and therefore others heuristic algorithm such as genetic algorithm (GA) [11], particle swarm optimization (PSO) [12] and artificial bee colony (ABC) [13] are proved to the available in damage identification.…”

Section: Introductionmentioning

confidence: 99%

A two-step approach for damage detection in beam based on influence line and bird mating optimizer

Tan¹,

Lu²

2017

Vib. proced.

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Abstract. This paper presents a two-step approach for structural damage identification in beam structure using the influence line and bird mating optimizer (BMO). Local damage is simulated as the reduction of the elemental Young's modulus and mass of beam element. The technique for damage localization based on influence line and its derivatives before and after damage for beam structure was outlined. An objective function comprised of dynamic acceleration is utilized for BMO algorithm. The dynamic response data under external force is calculated by Newmark integration method. Numerical examples of a simply supported beam was investigated. Effect of measurement noise is studied. Studies in the paper indicate that the proposed method is efficient and robust for identifying damages in beam structures.

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A two stage method for structural damage detection using a modal strain energy based index and particle swarm optimization

Cited by 235 publications

References 13 publications

A new energy indicator in damage locating vector method (DLV) for detecting multiple damaged positions in beam and truss structures

A new energy indicator in damage locating vector method (DLV) for detecting multiple damaged positions in beam and truss structures

Modified Modal Strain Energy Method for Analyzing the Dynamic Damping Behavior of Constrained Viscoelastic Structures

A two-step approach for damage detection in beam based on influence line and bird mating optimizer

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