On the significance of body mass and vibration magnitude for acceleration transmission of vibration through seats with horizontal suspensions

Blüthner, Ralph; Hinz, Barbara; Menzel, Gerhard; Schust, Marianne; Seidel, Helmut

doi:10.1016/j.jsv.2006.06.014

Cited by 16 publications

(16 citation statements)

References 7 publications

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“…This research is consistent with previous laboratory results which demonstrate negative relationships between body mass, transmission coefficient and seat effective amplitude transmissibility [19,20,22] as well as the positive relationships seen between body mass and vibration measures of total absorbed power, mechanical impedance and apparent mass [21][22][23][24][25][26]. These laboratory results thus support a negative relationship between body mass and vibration exposure.…”

Section: Discussionsupporting

confidence: 91%

“…Although high levels of WBV have been associated with occupational LBP, body mass may be an important intrinsic factor which modulates this relationship in different ways. Several laboratory studies ( Table 1) have investigated the influence of body mass on various WBV exposure measures (including mechanical impedance, absorbed power, vibration transmission and apparent mass) under varying experimental conditions including; seat cushion, seat suspension, back rest, seat and tyre pressure, vibration magnitude and frequency [19][20][21][22][23][24][25][26] Extrapolation from these laboratory studies generally demonstrates negative associations between increased body mass and vibration exposure.…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Body Mass on Whole-Body Vibration: A Quad-Bike Field Study

Mani¹

2011

TOERGJ

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Objectives: The aim of this field study was to explore the relationship between body mass and quad bike induced whole-body vibration (WBV) exposure in a group of New Zealand rural workers. Methods: WBV exposure was recorded using a seat pad mounted tri-axial accelerometer while rural workers (n=34) were driving a quad bike for approximately half an hour on a pre-marked track on farm terrain. Personal factors such as age, height and quad bike driving experience were also surveyed and included as co-variates. Vibration dose value (VDV) was calculated by analyzing the recorded raw vibration data samples (n=34) using vibration analysis software and corrected to a one hour equivalent exposure for further statistical analysis. To evaluate for the relationship between variables of interest (body mass, height, age and driving experience) and one hour VDV Z (1hrVDV Z), univariate and multivariate linear regression analysis were conducted. Results: Mean 1hrVDV Z was 13.2 m/s 1.75 exceeded the VDV exposure action value of 9.1 m/s 1.75. Univariate analysis demonstrated body mass (R 2 = 0.340) significantly (p < 0.0003) associated with 1hrVDV Z while age, body height and quad bike driving experience were not. In a multivariate backward linear analysis body mass, height, and experience combined to explain 38% (R 2 = 0.376) of the variance in 1hr VDV Z, however, only body mass (p= 0.0004) demonstrated statistical significance. Conclusion: Body mass is significantly and negatively associated with quad bike induced WBV (1hrVDV Z) in a group of New Zealand rural workers.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

The Influence of Body Mass on Whole-Body Vibration: A Quad-Bike Field Study

Mani¹

2011

TOERGJ

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“…The results showed a minor impact on the backrest under low frequency range due to the cross coupling between the vertical and lateral axes [57]. Evidently, the majority of studies confirmed that the horizontal vibration is insignificant in influencing the WBV in many cases [58,59].…”

Section: Multiple Degrees Of Freedom Vibrationmentioning

confidence: 77%

A Systematic Literature Review of Various Control Techniques for Active Seat Suspension Systems

Al-Ashmori

Wang

2020

Applied Sciences

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Drivers of heavy trucks are exposed to large amounts of vibration which can lead to serious health risks. Many suspension systems/methods can be used to isolate these transmitted vibrations, such as vehicle suspension systems, cabin suspension systems and seating suspension systems. The central idea of the work is to identify the research gaps and raise our future research questions in this specific area. The novelty of this paper is proposing a model predictive controller for active vibration control of seating suspension systems. A systematic literature review of the existing work of the vibration control of seating suspension systems has been conducted. Various control techniques that are used in the seating suspension systems have been summarized and evaluated. This paper focusses on the biodynamic model of the driver and seat for the first step needed in the design of the seating suspension system. Then, it illustrates the different types of the system vibration controls and their performance evaluation methods. At the end, the paper details several active seating suspension systems including their actuation system structures and control algorithms which are used in the heavy vehicle trucks.

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“…Diante dos dados avaliados comprovou-se que a marcha M3 nas rotações de 600 e 800 rpm são recomendadas para realizar operações com rotoencanteirador tracionado por um microtratror, já que a mesma foi a única marcha que se adequou as normas da NHO-10 (FUNDACENTRO, 2013), respeitando os limites toleráveis pelo operador em uma jornada de trabalho, é evidente que estes índices são importantes já que são poucos que se preocupam com o bem estar do operador nas operações agrícolas. Segundo Blüthner et al (2006) a vibração, pode acarretar sérios danos ao operador.…”

Section: Glunclassified

Vibração Em Mãos E Braços Na Utilização De Trator De Rabiça Equipado Com Rotoencanteirador

et al. 2020

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VIBRAÇÃO EM MÃOS E BRAÇOS NA UTILIZAÇÃO DE TRATOR DE RABIÇA EQUIPADO COM ROTOENCANTEIRADOR KARLA LÚCIA BATISTA ARAÚJO¹, LEONARDO DE ALMEIDA MONTEIRO², VIVIANE CASTRO DOS SANTOS3, DEIVIELISON XIMENES SIQUEIRA MACEDO4, FRANCISCA EDCARLA DE ARAÚJO NICOLAU5 1 Universidade Federal do Ceará -UFC, Departamento de Engenharia Agrícola, Bloco 804, Pici, 60020-181, Fortaleza-CE, Brasil. karla.batista@hotmail.com 2 Centro de Ciências Agrárias, Universidade Federal do Ceará -UFC, Departamento de Engenharia Agrícola, Bloco 804, Pici, 60020-181, Fortaleza-CE, Brasil. aiveca@ufc.br 3 Centro de Ciências Agrárias, Universidade Federal do Ceará -UFC, Departamento de Engenharia Agrícola, Bloco 804, Pici, 60020-181, Fortaleza-CE, Brasil. vihcs@live.com 4 Centro de Ciências Agrárias, Universidade Federal do Ceará -UFC, Departamento de Engenharia Agrícola, Bloco 804, Pici, 60020-181, Fortaleza-CE, Brasil. derilsiqueira@hotmail.com 5 Centro de Ciências Agrárias, Universidade Federal do Ceará -UFC, Departamento de Engenharia Agrícola, Bloco 804, Pici, 60020-181, Fortaleza-CE, Brasil. edcarla@hotmail.com RESUMO: O uso da tecnologia no campo veio para amenizar as intempéries às quais o trabalhador rural é submetido. A difusão dos microtratores na agricultura familiar ajuda a diminuir a carga física imposta a esses agricultores e o tempo de trabalho. Todavia o contato com essa tecnologia expõe o agricultor a novos problemas advindos da máquina sendo um deles a vibração. A redução da vibração, além de diminuir o estresse do operador, permite melhorar qualidade de vida e aumenta a eficiência no trabalho reduzindo a fadiga. Assim objetivou-se avaliar os níveis de vibração de um trator de rabiça acoplado com rotoencanteirador em diferentes rotações do motor e alocações de marchas no preparo do solo. O delineamento experimental utilizado foi em blocos inteiramente casualizados, em esquema fatorial 3 x 3, com 10 repetições sendo 3 rotações (600, 800 e 1000 rpm) e 3 marchas (3ª, 4ª e 5ª). Foram utilizados a estatística descritiva e o teste de Tukey a 5% para comparação das médias. Observou-se que as médias da terceira marcha nas rotações de 600 e 800 rpm foram as que mais se aproximaram da norma NHO 10 (2013), já que a mesma estabelece o valor de 2,5 m.s-2 como limite de vibração para mãos e braços toleráveis para uma jornada de trabalho. Palavras-chave: insalubridade, segurança na agricultura, bem-estar no trabalho. HANDS AND ARMS VIBRATION IN THE USE OF HANDLEBAR TRACTOR EQUIPPED WITH ROTOENCANTEIRATOR ABSTRACT: The use of the technology in the field comes to soften the intempéries to which the rural worker is submitted. A spread of microtractors in family farming helps to reduce the physical burden on farmers and working time. However the contact with this technology exposes the farmer to new problems coming from the machine being its vibration. Reducing vibration, in addition to reducing operator stress, can improve the quality of life and increase work efficiency by reducing fatigue. The aim of this study was to evaluate the vibration levels of a bulldozer coupled with rotoencanteirator at different engine speeds and to allocate gears without soil preparation. The experimental design was used in completely randomized blocks, in a 3 x 3 factorial scheme, with 10 repetitions being 3 rotations (600, 800 and 1000 rpm) and 3 marches (3rd, 4th and 5th). It was quite descriptive statistic and Tukey Test at 5% for average comparisons. It was observed that as average of the third gear at the 600 and 800 rpm rotations were as close to the NHO 10 (2013), since the same thing is the value of 2.5 m.s-2 as vibration limits for the hands and arms tolerable for a day's work. Keywords: insalubrity, safety in agriculture, well-being at work.

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On the significance of body mass and vibration magnitude for acceleration transmission of vibration through seats with horizontal suspensions

Cited by 16 publications

References 7 publications

The Influence of Body Mass on Whole-Body Vibration: A Quad-Bike Field Study

The Influence of Body Mass on Whole-Body Vibration: A Quad-Bike Field Study

A Systematic Literature Review of Various Control Techniques for Active Seat Suspension Systems

Vibração Em Mãos E Braços Na Utilização De Trator De Rabiça Equipado Com Rotoencanteirador

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