An Experimental Method for Vibrational Insertion Loss of Mechanical Joints
An experimental method is presented in this paper to determine vibro-acoustic properties of mechanical joints. A new quantity, vibrational insertion loss, which is the vibration reduction introduced by a joint and is used to describe vibro-acoustic performance of a mechanical joint in a finite system, is introduced. Two test-rigs are manufactured and tested for planar and non-planar joints. Results show that for well-defined joints, repeatability and reproducibility of the suggested parameter less than 2 dB can be achieved. Comparisons are also made between the vibrational insertion loss and the vibration level difference. It is illustrated that the vibration level difference can only detect the change of modal behaviour of the system, while the vibrational insertion loss can be used to detect both changes of modal behaviour and of system damping introduced by the insertion of the joint.
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Document Type: Research Article
Publication date: March 1, 2001
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- Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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