Various aspects of the development of level 1 training courses in vibration analysis were discussed. The features of the piezoelectric accelerometer, which is preferred in most vibration measurements due to its unique properties, such as relatively small size and weight were also discussed. Modern ...
Where possible, it is preferable that the excitation signal is recorded in order to improve the identification accuracy but analysis methods are available if this is not the case. Each excitation sequence will probably only last a maximum of 60 s because of the difficulty of holding the aircraft...
level of moderate nonstructural and some structural damage have indicated effective modal damping values of 10% or more of critical (McVerry, 1979;Beck, 1978). Five percent is a commonly used value in structural design, wherein a linear analysis of the structure in response to reduced ...
Sensitivity analysis is used to identify the variables that will affect the prediction the most. Sensitivity analysis comes in both global and local forms. The sensitivity analysis can be carried out using several techniques, and cosine amplitude is one of them. The cosine amplitude technique has b...
(%), 98.216), and (0.968, 0.295, 0.427, 96.674(%), 96.059), for training and testing datasets, respectively. However, the sensitivity analysis indicated that the spacing (r = 0.917) and number of blast-holes (r = 0.839) had the highest and lowest impact on the PPV intensity,...
Vibration training improves disability status in multiple sclerosis: A pretest-posttest pilot study. Yang F1, Estrada EF2, Sanchez MC2. Abstract The purpose of this study was to examine the effects of an 8-week vibration training program on changing the disability level in people with multiple ...
Equation 1 is a simplification of the governing equation of modal analysis for a single degree of freedom system. The natural frequency is related to the mass matrix (M) and stiffness matrix (K) of the enclosure design. Equation 1 provides a simple intuitive way to evaluate a design. As...
Whether you are acomplete newbie to the world of vibration exercise machines, know a little, or have become an avid user. Check out our analysis for the best choice! Here you’ll learn all you need to know about best vibration machine buys &vibration plate exercises– what they are, the...
Dynamic analysis models of combine harvester frames are useful for determining the reasons for the large level of vibration (Nokhbatolfoghahai, Noorian, & Haddadpour, 2018). Based on the vehicle 6-degrees of freedom vibration coupling model, Zhou, Liu, Gao, and Xiang (2018) used the ...
Post-training, participants displayed increased lean mass at the total body level (+770 g (+2.1%); p = 0.0003), in the trunk (+410 g (+2.4%); p = 0.004), and in the lower limbs (+240 g (+2.2%); p = 0.012), without any changes in fat mass (Table 1)...