Mechanical vibration. Ground-borne noise and vibration arising from rail systems

Peanut peeler machine will be very helpful for workers/farmers to do the continuous processing for their yields, but this tool has a weakness that is have noise and vibration. The purpose of the research is 1). To know the noise machine level; 2). To know the mechanical vibration of machine; and 3). To know the operator safety. This research used experimental method which consist of three treatments that’s is P1 = 800 rpm, P2 = 1000 rpm, and P3 = 1200 rpm. The parameters collect is noise level, mechanical vibration, work capacity, yield, residue, and efficiency. Based on the results of research and data analysis, peanut peeler machine at 1200 rpm (P3) is 69.8 dB better than P1 800 rpm treatment that is 75.8 dB and P2 1000 rpm about 72.8 dB. it show that the sound less then 85dB (A) with a maximum operation 8 hours/day. Mechanical vibration of peanut peeler at 1200 rpm (P3) is 11,4 Hz better than P1 800 rpm treatment that is 13,3 Hz and P2 1000 rpm is 12,4 Hz. The safety level of peanut machine operators is in the low category, the actual means can work so that it can cause inconvenience operators with mechanical categories and vibrations issued. This is due to mechanical vibration machines.

Download Full-text

Acoustic decoupling for structural elements by affixed supports - inherent contradiction or perfect complement? Restrained vibration isolation supports - a critical review

INTER-NOISE and NOISE-CON Congress and Conference Proceedings ◽

10.3397/in-2021-2234 ◽

2021 ◽

Vol 263 (4) ◽

pp. 2801-2811

Author(s):

Adam Wells ◽

Patrick Carels

Keyword(s):

Analytical Model ◽

Critical Review ◽

Laboratory Testing ◽

Vibration Isolation ◽

Mechanical Vibration ◽

Structural Elements ◽

Noise And Vibration ◽

Vibration Isolators ◽

Models Comparison ◽

Isolation Performance

Restrained vibration isolation supports balance efficient isolation performance and stability for the supporting body under present loads. Necessary and beneficially for noise and vibration isolation applications with stringent stability requirements, such as full building isolation with potential uplift, interior partition sway bracing, curtain walls, elevator rail isolation, and mechanical vibration isolation, the performance of restrained vibration isolators are often misunderstood or oversimplified. This paper investigates the general vibration isolation theory used to create the analytical model for restrained isolation supports, intricacies of vibration isolation materials which may cause reality to diverge from well-known models, comparison of theory to laboratory testing, and a review of common uses/applications for these types of vibration isolation solutions, and recommendation to avoid undesired results from common pitfalls associated with restrained isolation supports implementation and installations.

Download Full-text