An Experimental Investigation of Preferred Seat Pressure Distribution

Wang, Xuguang; Savonnet, Léo; Beurier, Georges; Obadia, Jean Marc

doi:10.1007/978-3-030-51064-0_42

Cited by 3 publications

(7 citation statements)

References 4 publications

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“…The purpose of the design of program 2 is to test whether the comfort score in program 1 is related to stature, on the other hand, and to examine whether there is a direct link between the objective index and the subjective score of the two types of cushions under different statures. Participants with different statures preferred different sizes of seats; relatively, taller participants reported less discomfort in larger seats than in smaller seats, and vice-versa [ 3 , 14 ]. Cardoso [ 13 ] and Wang et al [ 14 ] investigated seat discomfort by grouping participants by stature, weight, and gender.…”

Section: Discussionmentioning

confidence: 99%

“…Participants with different statures preferred different sizes of seats; relatively, taller participants reported less discomfort in larger seats than in smaller seats, and vice-versa [ 3 , 14 ]. Cardoso [ 13 ] and Wang et al [ 14 ] investigated seat discomfort by grouping participants by stature, weight, and gender. They indicated that the larger contact area between the human–seat interface led to lower average pressure and peak pressure for the larger BMI participants.…”

Section: Discussionmentioning

confidence: 99%

“…They indicated that the larger contact area between the human–seat interface led to lower average pressure and peak pressure for the larger BMI participants. Participants with different statures preferred different sizes of seats; relatively, taller participants reported less discomfort in larger seats than in smaller seats, and vice-versa [ 14 ]. Akgunduz et al [ 15 ] found that the relationship between contact area, contact force, and peak pressure is also directly related to the anthropometry and the cushion’s ability to deform under the weight of the subject.…”

Section: Introductionmentioning

confidence: 99%

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Influences of cushion contour on passenger comfort and interface pressure in high-speed train

Lian²,

Wu³

2023

PLoS ONE

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In this paper, eight different contoured cushions (S1-S8) in two categories (flat and wrapped) were designed to study the influence of different contoured cushions on passenger comfort in high-speed trains. Meanwhile, subjective data investigation by the comfort Likert Scale questionnaire and objective physical variables collection by the body-cushion contact pressure test was carried out. In addition, one-way ANOVA and Pearson correlation analysis were performed on the subjective survey and objective test data. The results show that the cushion contours had a significant effect on the subjective evaluation of the overall comfort of the participants, in which the overall comfort below the waist of the separated wrapped cushion S8 has the highest subjective comfort score. The overall comfort of the flat-front bulge type cushion S4 and the local comfort of the thighs and the root of the thighs were rated higher than other flat types. Under the flat cushion, the effect of stature characteristics (mainly weight and hip-width) on the overall comfort subjective ratings was insignificant, and the effect on the contact pressure distribution variables was significant, but the contact pressure distribution variables were not correlated with the comfort ratings. Under the wrapped cushion, the effect of stature characteristics on the overall comfort subjective ratings and contact pressure distribution variables was significant. There were positive and negative correlations between the average peak contact pressure and average contact pressure and comfort ratings, respectively.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influences of cushion contour on passenger comfort and interface pressure in high-speed train

Lian²,

Wu³

2023

PLoS ONE

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“…Besides, the proposed prototyping approach (Gibson et al, 2004;Liu, 2011) also highlights the possibility of realizing a modifiable and reproducible design (Virtual Prototype) and then a Physical Prototype in a short time and with few iterations. This design approach, easily reproducible and adaptable for every type of chair or seat-pan, was based on the simultaneous use of three standard methods: 1) the analysis of pressures (Hiemstra-van Mastrigt, Groenesteijn, et al, 2016;De Looze et al, 2003;Wang et al, 2020;Zemp et al, 2015) and contact areas (Fang et al, 2016;Zemp et al, 2016;Zenk et al, 2012); 2) the analysis of different fixed postures (Groenesteijn et al, 2014;Hiemstra-van Mastrigt, Groenesteijn, et al, 2016, Naddeo et al, 2018; 3) the analysis of perceived discomfort through questionnaires (El Falou et al, 2003;Kyung and Nussbaum, 2008;Mansfield et al, 2015;Naddeo et al, 2019;Naddeo and Memoli, 2009;Zenk et al, 2006). The originality, therefore, lies in the triple evaluation and in the project proposal.…”

Section: Discussionmentioning

confidence: 99%

“…The pressure distribution is the objective measure with the most evident association with subjective ratings of discomfort compared to other measures (De Looze et al, 2003). Also, to assess the perceived (dis)comfort objectively, the pressure mapping system is the most widely used thanks to its relatively low cost and easy use (Wang et al, 2020;Zemp et al, 2015), and presents statistical correlations with discomfort (Hiemstra-van Mastrigt, Groenesteijn, et al, 2016;De Looze et al, 2003). Moreover, interface pressure depends on postures, seat characteristics (also the shape), assumed body positions, anthropometric measurements (Hiemstra-van Mastrigt, Groenesteijn, et al, 2016, Naddeo et al, 2018.…”

Section: Introductionmentioning

confidence: 99%

Designing a Shaped Seat-Pan Cushion to Improve Postural (Dis)comfort Reducing Pressure Distribution and Increasing Contact Area at the Interface

et al. 2021

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Remaining seated for extended periods increases the risk health issues and discomfort perception. Consequently, the seat-pan design is crucial and could be mainly influenced by two factors: pressure distribution and seat contour. For seat pan discomfort, the lower average pressure is accompanied by less discomfort. Moreover, a seat contour with a large contact area is correlated with more comfort. Thus, a shaped cushion had been accurately designed (Virtual Prototype) and realized (Physical Prototype) aiming to translate the pressure distribution due to interaction between seat and buttock in a geometric shape, suitable for the international population (including P5 females and P95 males). With this shape, the pressure should be more uniform and lower, the contact area at interface bigger, and the perceived comfort higher. Both Virtual and Physical Prototype design had been described in this paper through a repeatable and straightforward approach. Also, experiments had been performed to validate the hypothesis through a comparison with a standard flat cushion. Results showed the goal of the design had been reached: the shaped cushion scored less pressure distribution and higher contact area than the flat cushion.

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Human-Centered Design and Manufacturing of a Pressure-Profile-Based Pad for Better Car Seat Comfort

Naddeo,

Morra,

Califano

2024

Machines

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A car seat’s function is to support, protect, and make passengers and drivers feel comfortable during a trip. A more uniform pressure distribution and a larger contact area usually provide less discomfort. Consequently, the seat pan’s material and geometry play an essential role in the design process. A shaped pad was opportunely designed and realized, starting from the pressure distributions between the buttocks and the seat pan; pressure data were acquired during an initial experiment involving 41 people, representing a wide range of percentiles. The shaped pad was compared with a standard one by building a special seat with an interchangeable internal pad and testing the standard and the new seat; the second experiment involved 52 people that tested both seats. The tests were conducted to assess comfort (33 subjects were asked to be seated for 1 min each) and discomfort (19 subjects were asked to be seated for 15 min each); during the tests, pressure distribution and contact area data were gathered. The results showed that, for both tests, about 80% of the participants, among which 100% of the female sample, preferred the shaped seat pan pad. Even if the material was exactly the same, the shaped pad seemed to be softer, more comfortable, and more suited to the body’s shape than the standard one. The design methodology was demonstrated to be very useful for granting a more uniform pressure distribution and a wider contact area, i.e., higher comfort and less discomfort.

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An Experimental Investigation of Preferred Seat Pressure Distribution

Cited by 3 publications

References 4 publications

Influences of cushion contour on passenger comfort and interface pressure in high-speed train

Influences of cushion contour on passenger comfort and interface pressure in high-speed train

Designing a Shaped Seat-Pan Cushion to Improve Postural (Dis)comfort Reducing Pressure Distribution and Increasing Contact Area at the Interface

Human-Centered Design and Manufacturing of a Pressure-Profile-Based Pad for Better Car Seat Comfort

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