Test Protocol for In-situ Bicycle Wheel Dynamic Comfort Comparison

Lépine, Julien; Champoux, Yvan; Drouet, Jean-Marc

doi:10.1016/j.proeng.2016.06.241

Cited by 6 publications

(13 citation statements)

References 11 publications

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“…Even if road tests are the most direct method for measuring bicycle comfort, some researchers highlighted that the repeatability of results is sometimes poor, owing to variations in rider posture, bicycle speed, and road conditions [7]. Consequently, some laboratories developed indoor testing equipment, based on shakers [8,9] that mimic road excitations, to systematically analyse the relative contribution of bicycle components to the vibrations transmitted to the cyclists.…”

Section: Introductionmentioning

confidence: 99%

An experimental-numerical method for the prediction of on-road comfort of city bicycles

Doria

Marconi

Muñoz

et al. 2020

Vehicle System Dynamics

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A low-cost experimental-numerical method for the prediction of on-road comfort of city bicycles is presented. Experimental tests are performed by exciting the wheels of the bicycle with impulsive vibrations and measuring the frequency response functions (FRFs) between different sensitive points of the bicycle (i.e. seatpost and steerer tube) and the wheels. Laboratory tests are carried out with the rider on the bicycle, and the posture is carefully checked. A mathematical model is employed to predict the accelerations experienced by the rider on the road, considering tyre and wheelbase filtering. As a verification of the proposed methodology, comfort predictions obtained with the experimental-numerical method are compared with reference data obtained from road tests. A general agreement in terms of the root mean square values and power spectral densities is found.

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Section: Introductionmentioning

confidence: 99%

An experimental-numerical method for the prediction of on-road comfort of city bicycles

Doria

Marconi

Muñoz

et al. 2020

Vehicle System Dynamics

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“…Several studies related to the transmission of vibration by a road bicycle and road bicycle dynamic comfort have been reported in the literature. Test protocols and test rigs that mimic the road excitation in a laboratory were developed [4][5][6][7], and a wide range of transducers have been embedded within the bicycle in areas such as the brake hoods, stem, handlebars and seatpost to measure transmitted acceleration, force, power and energy to the cyclist [8][9][10][11]. The assessment of the bicycle and bicycle components' vibration transmissibility has been carried out [4,6,11], while psychophysics approaches have been used to assess cyclists' vibration perceptual thresholds, suggesting that there is a large variability among cyclists in their capacity to differentiate sensory inputs at the hands [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…The present study aims to quantify the effectiveness of cycling gloves and handlebar tape in reducing the vibration transmitted to the cyclist. The reduction of transmitted vibration was measured in terms of transmitted power and transmitted energy at the cyclist's hands since these two mechanical quantities are emerging as preferred metrics for bicycle dynamic comfort assessment [5,7,[10][11][12][13]. A shock-type excitation (i.e., impacts) was used in this study since it was thought to have a more severe negative effect on the cyclist than that of random-type excitation (i.e., excitation related to road surface roughness).…”

Section: Introductionmentioning

confidence: 99%

On the Exposure of Hands to Vibration in Road Cycling: An Assessment of the Effect of Gloves and Handlebar Tape

Drouet

Covill

Duarte

2018

The 12th Conference of the International Sports Engineering Association

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The objective of this work was to assess the effectiveness of cycling gloves and handlebar tape in reducing the vibration transmitted to the cyclist's hands in the classic "hoods" position for shock-type excitation at the front wheel on a bicycle treadmill. Three pairs of conditions were tested on a single participant: (1) With gloves vs. no gloves, no bar tape; (2) With bar tape vs. no bar tape, no gloves; (3) With gloves and bar tape vs. no gloves and no bar tape. We have shown that a rider can expect a small but significant drop in the level of transmitted power and energy through the handlebars when wearing a standard pair of road cycling gloves. If bar tape is used however (both with and without gloves), there is a significantly larger drop in the level of transmitted power and energy through the handlebars.

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“…Research relative to comfort in road cycling hypothesized that the higher the level of bicycle’s vibration, the lower the level of comfort. 14,15 Applying accelerometers in specific part of the frame and wheels has resulted as an increase in the vibrations induced to the bike by increasing speed or tire pressure. 14 Also the employment of different wheels has been demonstrated to influence the amount of vibrations induced to the bike and thus the level of comfort.…”

Section: Introductionmentioning

confidence: 99%

“…14 Also the employment of different wheels has been demonstrated to influence the amount of vibrations induced to the bike and thus the level of comfort. 15 Hölzel et al 16 concentrated on different road surfaces showing how they influenced the level of vibrations and the rolling resistance, parameters linked to the level of comfort. However, in neither of these studies, the amount of vibrations was correlated with the level of comfort perceived by the cyclist, measured with numeric scales.…”

Section: Introductionmentioning

confidence: 99%

Experimental methods for the mechanical characterization of cycling short pads

Marcolin

Panizzolo

Paoli

et al. 2017

Proceedings of the IMechE

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In cycling, non-traumatic injuries affecting the genitourinary tract have been the most extensively studied considering their effect in reducing the quality of life. The employment of saddle with specific geometries and of cycling shorts with pads can contribute to reduce the pressure on the perineal area and to increase the level of comfort. The aim of this study was to develop a method to quantify the mechanical properties of pads which can influence the cyclist's perineal protection and its level of comfort. The proposed method consisted of both a laboratory and a field test component. The laboratory part included an accelerated fatigue test of 300,000 cycles performed with an hydraulic actuator. Loads employed were derived from pressure data collected on the saddle of a professional cyclist who pedalled both on asphalt and crossing potholes at a constant speed. The measurement of cylinder force and displacement allowed to calculate the damping and the stiffness over time for the pads tested. The field test allowed to collect the acceleration at the seatpost of the bike and at the back of the cyclist by means of two accelerometers. A transfer function (H(f)) allowed to quantify the vibration transmissibility of the pads. The application of our method characterized the pads tested concerning damping, stiffness and vibration transmissibility. This method could be useful for the manufacturer in the choice of density and thickness of foams, to obtain the desired level of protection, comfort and long-time efficacy of pads.

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Test Protocol for In-situ Bicycle Wheel Dynamic Comfort Comparison

Cited by 6 publications

References 11 publications

An experimental-numerical method for the prediction of on-road comfort of city bicycles

An experimental-numerical method for the prediction of on-road comfort of city bicycles

On the Exposure of Hands to Vibration in Road Cycling: An Assessment of the Effect of Gloves and Handlebar Tape

Experimental methods for the mechanical characterization of cycling short pads

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