Experimental Modal Test of the Laboratory Model of Steel Truss Structure

Kortiš, Ján; Daniel, Ľuboš; Škarupa, Milan; Duratny, Maros

doi:10.1515/cee-2016-0016

Cited by 8 publications

(3 citation statements)

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“…This contribution is related to dynamic analysis work [9,10] at the Faculty of Mechanical Engineering, Department of Applied Mechanics, University of Zilina and [11,14]. …”

Section: Resultsmentioning

confidence: 99%

The contribution to the modal analysis using an infrared camera

et al. 2018

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Abstract. The paper deals with modal analysis using an infrared camera. The test objects were excited by the modal exciter with narrowband noise and the response was registered as a frame sequence by the high speed infrared camera FLIR SC7500. The resonant frequencies and the modal shapes were determined from the infrared spectrum recordings. Lock-in technology has also been used. The experimental results were compared with calculated natural frequencies and modal shapes.

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“…This contribution is related to dynamic analysis work [9,10] at the Faculty of Mechanical Engineering, Department of Applied Mechanics, University of Zilina and [11,14]. …”

Section: Resultsmentioning

confidence: 99%

The contribution to the modal analysis using an infrared camera

et al. 2018

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“…The design of the laboratory steel truss structure used to compare the two approaches to the measurement signal evaluation is described in detail in [9]. Sixteen Brüel & Kjaer (BK) type 4508-B-002 accelerometers were used to measure the dynamic response of the structure to the random excitation.…”

Section: Experimental Measurementsmentioning

confidence: 99%

Estimation of natural frequencies of the laboratory truss structure with output only subspace and frequency-domain techniques

2020

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Non-destructive methods of structural testing are preferred to identify their current state because they do not damage the structure. Modal analysis is one of these methods that can be used for a comprehensive assessment of structural measurements. Its main advantage is that it can be used for variety applications. The paper presents an application of operational modal analysis to determine modal parameters of a laboratory steel truss structure. Its goal is to make contribution to the still unfinished development of modal analysis in the area of comprehensive application. There is important to try to use it and especially try to derive some basic generally applicable rules. It is an important step for experimental modal analysis before it can be widely used and accepted in engineering applications.

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“…Some orders may not be identified in modal test, therefore, the pre-test analysis in modal test is proposed to solve this problem [6] .In order to effectively acquire the natural frequency, a method of increasing the accuracy of a previously extracted natural frequency is proposed [7] .The modal test is widely used in structural dynamics analysis in the fields of Aerospace and Machinery & Electronics Engineering [8].In this paper, the running hammer method as a modal test, which is used to obtain the natural frequency of a high speed vehicle. The running hammer method can avoid the non-linear influence of the test piece structure, such as the additional mass of the sensor, the additional rigidity of the exciter and the additional mass.…”

Section: Introductionmentioning

confidence: 99%

Research on natural frequency based on modal test for high speed vehicles

Ma¹,

He²,

Guo³

2018

AIP Conference Proceedings

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Abstract. High speed vehicle as a vibration system, resonance generated in flight may be harmful to high speed vehicles. It is possible to solve the resonance problem by acquiring the natural frequency of the high-speed aircraft and then taking some measures to avoid the natural frequency of the high speed vehicle. Therefore, In this paper, the modal test of the high speed vehicle was carried out by using the running hammer method and the PolyMAX modal parameter identification method. Firstly, the total frequency response function, coherence function of the high speed vehicle are obtained by the running hammer stimulation test, and through the modal assurance criterion (MAC) to determine the accuracy of the estimated parameters. Secondly, the first three order frequencies, the pole steady state diagram of the high speed vehicles is obtained by the PolyMAX modal parameter identification method. At last, the natural frequency of the vibration system was accurately obtained by the running hammer method.

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Experimental Modal Test of the Laboratory Model of Steel Truss Structure

Cited by 8 publications

References 0 publications

The contribution to the modal analysis using an infrared camera

The contribution to the modal analysis using an infrared camera

Estimation of natural frequencies of the laboratory truss structure with output only subspace and frequency-domain techniques

Research on natural frequency based on modal test for high speed vehicles

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