Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Lester W"'
Publikováno v:
Ultrasonics. 97:57-62
A non-paraxial multi-Gaussian beam (NMGB) model is proposed for Leaky Rayleigh Waves (LRWs) generated by a focused immersion transducer at oblique incidence. Using the NMGB model, the velocity fields are calculated and compared with the corresponding
Autor:
Lester W. Schmerr
Publikováno v:
Engineering Dynamics 2.0 ISBN: 9783319984698
In Chap. 2 we used the motion of a single particle to discuss a wide range of topics including force versus moment equations, potential energy, work-energy concepts, constraint forces, generalized coordinates, Lagrange’s equations, and others. In t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e21d8821ddd75fb89dda5a2551baba06
https://doi.org/10.1007/978-3-319-98470-4_3
https://doi.org/10.1007/978-3-319-98470-4_3
Autor:
Lester W. Schmerr
Publikováno v:
Engineering Dynamics 2.0 ISBN: 9783319984698
The planar problems examined in Chap. 5 do not describe a number of the dynamical behaviors found in 3-D problems such as gyroscopic effects. In this chapter we describe the spatial dynamics of rigid bodies and the numerical solutions of the equation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be89365cea6fdbcce518bf8f398a4926
https://doi.org/10.1007/978-3-319-98470-4_8
https://doi.org/10.1007/978-3-319-98470-4_8
Autor:
Lester W. Schmerr
Publikováno v:
Engineering Dynamics 2.0 ISBN: 9783319984698
This chapter examines the dynamics of rigid bodies in planar motion and the forces/moments that act upon them. It will be shown how the equations of motion can be generated using a classical Newton-Euler approach as well as with Lagrange’s equation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b7fedb27e1c30f87c8e5ea5db66b2dd
https://doi.org/10.1007/978-3-319-98470-4_5
https://doi.org/10.1007/978-3-319-98470-4_5
Publikováno v:
Research in Nondestructive Evaluation. 27:175-191
Explicit three-dimensional (3D) point source and multi-Gaussian beam models are obtained for the Rayleigh waves generated by a surface wave angle beam transducer using an angular plane wave spectrum approach. Simulations show that the multi-Gaussian
Autor:
Lester W. Schmerr
Publikováno v:
Fundamentals of Ultrasonic Nondestructive Evaluation ISBN: 9783319304618
The models of wave propagation described in the previous Chapters have all treated the underlying fluids and/or solids as perfect, non-attenuating media. Real materials, however, do exhibit an attenuation that must be accounted for in any complete de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce75bf696490e2cbe6b6d98bf1a094e2
https://doi.org/10.1007/978-3-319-30463-2_9
https://doi.org/10.1007/978-3-319-30463-2_9
Autor:
Lester W. Schmerr
Publikováno v:
Fundamentals of Ultrasonic Nondestructive Evaluation ISBN: 9783319304618
When an incident bulk wave interacts with an interface, such as the boundary between a fluid and a solid in immersion testing, both reflected and transmitted bulk waves are generated. This Chapter will describe the general properties of those reflect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2576e958b0f9cbd34397cd7d113a99fc
https://doi.org/10.1007/978-3-319-30463-2_6
https://doi.org/10.1007/978-3-319-30463-2_6
Autor:
Lester W. Schmerr
Publikováno v:
Fundamentals of Ultrasonic Nondestructive Evaluation ISBN: 9783319304618
In Chap. 12 we derived the Thompson-Gray measurement model using both a direct approach and an approach based on reciprocity relations. In either case, we assumed the incident and scattered waves could be treated as quasi-plane waves modified by appr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a7673c7421a86f6c6ae01a118ec4d8e
https://doi.org/10.1007/978-3-319-30463-2_13
https://doi.org/10.1007/978-3-319-30463-2_13
Autor:
Lester W. Schmerr
Publikováno v:
Fundamentals of Ultrasonic Nondestructive Evaluation ISBN: 9783319304618
From the results obtained in Chaps. 8 and 10, we now know how to model the incident sound beam produced by a transducer and the waves scattered from a flaw due to such an incident wave field. In this Chapter, we will model the reception of those scat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5002150197e5de6749b5dec0ebb36932
https://doi.org/10.1007/978-3-319-30463-2_11
https://doi.org/10.1007/978-3-319-30463-2_11
Autor:
Lester W. Schmerr
Publikováno v:
Fundamentals of Ultrasonic Nondestructive Evaluation ISBN: 9783319304618
In the previous Chapter we modeled an ultrasonic system as a system function, which characterized all the electrical and electromechanical parts of the system, and an acoustic/elastic transfer function, which describes the processes present that are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::90cdcd21dc69b477a774f4d8f01d4fb9
https://doi.org/10.1007/978-3-319-30463-2_3
https://doi.org/10.1007/978-3-319-30463-2_3