Subjective absolute discomfort threshold due to idle vibration in passenger vehicles according to sitting posture

Song, Jun-kyung; Ahn, Su−Jin; Jeong, Weui-Bong; Yoo, Wan-Suk

doi:10.1007/s12239-017-0029-1

Cited by 12 publications

(8 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results correspond to the findings of previous researchers where exposure to WBV combined with poor posture was found to increase the risk of lower back disorders [6,11,28,53,54]. This is also supported by a study conducted by Song et al [55], demonstrating the negative impact of poor posture on the subjective thresholds of discomfort of participants. It was concluded that participants experienced greater levels of discomfort in non-neutral postures, decreasing their self-reported threshold as the postures shifted further away from a neutral position [55].…”

Section: Discussionsupporting

confidence: 92%

“…This is also supported by a study conducted by Song et al [55], demonstrating the negative impact of poor posture on the subjective thresholds of discomfort of participants. It was concluded that participants experienced greater levels of discomfort in non-neutral postures, decreasing their self-reported threshold as the postures shifted further away from a neutral position [55]. Furthermore, discomfort is considered an early indicator of injury risk [33], and therefore the postures identified as most uncomfortable are likely to be the most harmful.…”

Section: Discussionsupporting

confidence: 78%

See 1 more Smart Citation

Examining the Impact of Rotated Neck and Trunk Postures on Vertical Seat-to-Head Vibration Transmissibility and Self-Reported Discomfort

et al. 2022

View full text Add to dashboard Cite

Adopting non-neutral sitting postures while exposed to whole-body vibration (WBV) can put heavy equipment operators at an increased risk for lower back pain and may cause damage to the spinal tissue. A laboratory experiment involving 11 participants (5 females, 6 males) completing four 45-min test sessions incorporating different seated conditions (vibration versus no vibration, and rotation versus no rotation) was used to assess seat-to-head transmissibility (STHT) and self-reported discomfort while in four rotated neck and trunk postures. The vibration exposure profile was a constant vertical sinusoidal signal with a frequency of 3 Hz and 0.7 m/s2 acceleration. Vibration measured at the head was greater than at the seat under all conditions, with a statistically significant effect of time (F1,10 = 101.73, p < 0.001, Eta2 = 0.910) and posture (F3,8 = 5.64, p = 0.023, Eta2 = 0.679). Mean self-reported discomfort ratings revealed increased participant discomfort in rotated neck and trunk positions in both vibration and non-vibration conditions. Increasing time also had a significant (F(1,10) = 15.53, p = 0.003) impact on higher rates of participant discomfort. Overall, it was found that increasing the degree of rotated neck and trunk position from neutral amplified the STHT and self-reported discomfort.

show abstract

Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 78%

Examining the Impact of Rotated Neck and Trunk Postures on Vertical Seat-to-Head Vibration Transmissibility and Self-Reported Discomfort

et al. 2022

View full text Add to dashboard Cite

show abstract

“…On the one hand, under idle operating conditions, the engine (four-stroke) is the main excitation source affecting the vibration of the steering wheel. e main excitation of the engine mainly comes from the torsional pulsation caused by changes in the internal cylinder pressure and can be expressed by the ignition pulse vibration excitation, and the corresponding calculation equation is as follows [36]:…”

Section: Ignition Excitation Analysis Of Engine Node Systemmentioning

confidence: 99%

Research on a Multinode Joint Vibration Control Strategy for Controlling the Steering Wheel of a Commercial Vehicle

Tang

Ye³

et al. 2020

Shock and Vibration

View full text Add to dashboard Cite

The vibration degree of a steering wheel has important reference significance for drivers to evaluate the ride comfort of the whole vehicle. To solve the jitter problem of the steering wheel of a commercial vehicle at idle speed, this work proposes a multinode joint vibration control strategy (MDVC) based on the associated vibration path of the steering wheel. Based on the analysis of the associated vibration transfer paths of the steering wheel, the whole vehicle was divided into a system comprising several nodes. For the decomposed node system, taking the vibration transmission path associated with the target as the research direction, the vibration reduction design of each node system is analyzed step by step. After exploring the possible causes of abnormal vibration of the steering wheel through experimental tests, the abnormal node structure interval was determined. By further extracting the structural model of the steering system from the vehicle, the hammering method was applied to test its modal and related frequency. Furthermore, an improved structure of steering support was also designed, and its fitting degree and modal characteristics were analyzed and compared to the original scheme. The following test results show that the structure improvement greatly reduces the vibration level of the steering wheel, meets the ideal design requirements of the steering wheel vibration reduction, and provides the possibility of weighing the correlation between these hierarchical node systems in whole vehicle.

show abstract

“…Human sitting posture, in combination with the configuration of the car seat, can affect postural stability, where the seat may promote postures that enhance trunk stability and comfort. Bhiwapurkar, Saran and Harsha (2016) and Song, Ahn, Jeong and Yoo (2017) studied effects of posture sitting without back support. Bhiwapurkar et al (2016) showed that forward-leaning sitting postures cause an extra peak in STHT in comparison with erect sitting postures.…”

Section: Introductionmentioning

confidence: 99%

Effects of seat back height and posture on 3D vibration transmission to pelvis, trunk and head

Mirakhorlo

Kluft²,

Shyrokau³

et al. 2022

International Journal of Industrial Ergonomics

View full text Add to dashboard Cite

Subjective absolute discomfort threshold due to idle vibration in passenger vehicles according to sitting posture

Cited by 12 publications

References 21 publications

Examining the Impact of Rotated Neck and Trunk Postures on Vertical Seat-to-Head Vibration Transmissibility and Self-Reported Discomfort

Examining the Impact of Rotated Neck and Trunk Postures on Vertical Seat-to-Head Vibration Transmissibility and Self-Reported Discomfort

Research on a Multinode Joint Vibration Control Strategy for Controlling the Steering Wheel of a Commercial Vehicle

Effects of seat back height and posture on 3D vibration transmission to pelvis, trunk and head

Contact Info

Product

Resources

About