Case study on vibration health risk and comfort levels in loading crane trucks

Filho, José Gilberto Picoral; Neto, Mário Fedatto; Quintas, Juan Pablo Raggio; Gomes, Herbert Martins

doi:10.1002/hpm.2808

Cited by 2 publications

(1 citation statement)

References 17 publications

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“…Human organs and external vibration will produce resonance. When the external vibration frequency force falls within the resonance range, resonance will occur, causing damage to human parts or organs and affecting human health [ 23 ]. It can be seen from Table 6 that the human body parts or organs damaged by different vibration frequencies are different.…”

Section: Resultsmentioning

confidence: 99%

Test and evaluation of driving comfort of rice combine harvester

Zhao,

Liu,

et al. 2023

PLoS ONE

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During the field operation of rice combine harvester, the vibration generated by vibration component will only reduce mechanical reliability and yield, but also cause resonance in the human body, leading to a decrease in driving comfort and even damage to the driver’s health. To study the impact of combine harvester vibration on driving comfort, a certain type of tracked rice combine harvester was selected as the research object, and vibration tests were carried out based on vibration source analysis in the driving cab during field harvesting operations. The study showed that under the influence of field road conditions and crop flow, the operating speed of the engine, threshing rotor, stirrer, cutting blade, threshing cylinder, vibration sieve and conveyor were fluctuating, and their rotation and reciprocating motion would produce vibration excitation in the driving cab. A spectrum analysis was conducted on the acceleration signal of the driver’s cab, and it was found that vibration frequencies at three measuring points, namely the pedal, control lever, and seat, can reach up to 36.7~43.3 Hz. These frequencies can cause resonance in various parts of the driver’s body, such as the head and lower limbs, leading to symptoms such as dizziness, throat discomfort, leg pain, defecation anxiety, and frequent urination, and even affect vision of the driver. At the same time, a weighted root-mean-square acceleration evaluation method was used to evaluate the driving comfort of the harvester. The evaluation method showed that the vibration at the foot pedal (Aw1 = 4.4 m/s2>2.5 m/s2) caused extreme discomfort, while the vibration at the seat (0.5 m/s2< Aw2 = 0.67 m/s2<1.0 m/s2) and the control lever (0.5 m/s2< Aw3 = 0.55 m/s2<1.0 m/s2) caused relatively less discomfort. This research can provide some reference for the optimization design of the joint harvester driver’s cab.

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Section: Resultsmentioning

confidence: 99%

Test and evaluation of driving comfort of rice combine harvester

Zhao,

Liu,

et al. 2023

PLoS ONE

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Alteration of Brain Tissue, Liver, and Kidney in the Post-Contact Period in White Rats Exposed to Vibration

Титов

Pankov

Lizarev

et al. 2019

HAS

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Introduction. Experimental studies in animals have shown ultrastructural changes in hepatic sinusoidal endothelial cells, tissue hypoxia of the kidneys, changes in the activity of oxidative processes and antioxidant enzymes, the formation of bioenergetic hypoxia, cell response in the form of infiltration of both lymphoid and macrophage cells to develop due to exposure to vibration. However, there is almost no data about the status of animals’ organs in the post-contact period. Material and methods. The study was carried out in white male rats weighing 220-240 g, were exposed to 40 Hz vibration for 60 days 5 times a week for 4 hours a day. Histological and morphometric analysis was used to assess the sensorimotor cortex tissue and hepatorenal system. Results. A decrease in the total number of brain neurons, astraglial cells in rats in 30, 60 and 120 days of the post-exposure period was found. There was hyperemia in the portal and Central veins, an increase in the number of Kupffer cells in the liver tissue at the 30th, 60th, 120th day after the exposure. Decrease in the area of the Shumlyansky-Bowman capsule was recorded in the experimental rats’ kidney tissue 30 days after the end of vibration exposure; though there were no differences in the number of renal bodies in the tissue of white rats of the experimental and control groups at 60th and 120th day after the end of exposure to vibration. Conclusion. Morphological changes in the tissues of white rats exposed to prolonged vibration presented in the form of a decrease in the total number of neurons and astroglia cells in the brain tissue, a pronounced macrophage response in the liver tissue have been preserved in the post-contact period following the exposure to vibration.

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Case study on vibration health risk and comfort levels in loading crane trucks

Cited by 2 publications

References 17 publications

Test and evaluation of driving comfort of rice combine harvester

Test and evaluation of driving comfort of rice combine harvester

Alteration of Brain Tissue, Liver, and Kidney in the Post-Contact Period in White Rats Exposed to Vibration

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