Transient bending waves in anisotropic plates studied by hologram interferometry

Fällström, Karl-Evert; Lindgren, Lars‐Erik; Molin, Nils-Erik; Wåhlin, Anders

doi:10.1007/bf02323859

Cited by 26 publications

(13 citation statements)

References 3 publications

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“…So in the practical works, such as plates, beams and tubes, it is possible that vibrational modes be in the range of audible sound and play a role in sound generation. This has been investigated by Fallstrom et al and Olofsson et al [21,22].…”

Section: Effects Of Vibration Modes On Radiation Of Soundmentioning

confidence: 91%

“…However, collecting the experimental study of the phenomena is not easy because of high speed of propagation of elastic waves in solid structure. Several papers on the behavior of propagating transient flexural waves in impacted plates have been reported [1][2][3]. Some manuscripts are surveyed sound radiated from impacted plates [4][5][6].…”

Section: Introductionmentioning

confidence: 98%

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Impact noise radiated by collision of two spheres: Comparison between numerical simulations, experiments and analytical results

2011

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Impact is very common source of noise in the industries. The impacts can be visible, such as forging, and can be invisible, such as impacts due to clearance of hinges. As a result of this generality, the control of impact noise needs more attention. Reduction of this tiresome noise needs enough perception about the impact. A study of this noise sources presents difficult problems both theoretically and experimentally. This is partly due to the many complex interconnected mechanical phenomena that occur and partly due to the fact that usual steady-state techniques of analysis cannot be applied. In such complex problems numerical techniques can help to acousticians. To gain some insight into this source of sound, in this paper collision of two steel spheres are studied with finite element method (FEM). Then the FEM results were compared with experiments to show authority of this numerical method to simulate impact noises. FEM results show that if the vibrational modes are excited by impact, the vibrational modes can be as effective as rigid body motion.

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Section: Effects Of Vibration Modes On Radiation Of Soundmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 98%

Impact noise radiated by collision of two spheres: Comparison between numerical simulations, experiments and analytical results

2011

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“…The propagation elastic waves in plates and pipes using holographic interferometry techniques were proposed by several authors (Aprahamian, 1971;Fallstrom, 1989a;Fallstrom, 1989b;Olofsson, 1994;Fallstrom, 1998). A double pulse Laser technique is used to measure the displacements in isotropic plates (Aprahamian, 1971;Olofsson, 1994), anisotropic plates (Fallstrom, 1989a;Fallstrom, 1989b;Olofsson, 1994;Fallstrom, 1998) and anisotropic tubes (Olofsson, 1994;.…”

Section: Methods Based On Full-field Measurement Of Displacement or Rmentioning

confidence: 99%

“…A double pulse Laser technique is used to measure the displacements in isotropic plates (Aprahamian, 1971;Olofsson, 1994), anisotropic plates (Fallstrom, 1989a;Fallstrom, 1989b;Olofsson, 1994;Fallstrom, 1998) and anisotropic tubes (Olofsson, 1994;. The holographic interferometry and the flexural waves propagation were also used to Structural Health Monitoring in Composite Automotive Elements 295 investigate the debonding in the interface areas of ceramic-metal plate (Conrad, 2001).…”

Section: Methods Based On Full-field Measurement Of Displacement or Rmentioning

confidence: 99%

Structural Health Monitoring in Composite Automotive Elements

Lopes¹,

Ribeiro²

2012

New Advances in Vehicular Technology and Automotive Engineering

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“…This way; they can be applied over diffuse and complex geometry surfaces without interfering with its structural behavior. With these techniques quasi-static, periodic or transient phenomena can be studied by selecting continuous emission or pulsed lasers [4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%