Measurements and modelling of dynamic stiffness of a railway vehicle primary suspension element and its use in a structure-borne noise transmission model

Liu, Xiaowan; Thompson, D.J.; Squicciarini, Giacomo; Rissmann, Martin; Bouvet, Pascal; Xie, Gang; Martínez‐Casas, José; Carballeira, Javier; Arteaga, Inés López; Garralaga, Miguel A.; Chover, J A

doi:10.1016/j.apacoust.2021.108232

Cited by 9 publications

(7 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, the spring deflection of the primary suspension stage is often not known in detail and depends on the state of the loading of the vehicle. Based on the investigations of Liu et al [25], a deflection in the range of 60 mm to 70 mm is to be expected. The sensor model used in this study had a measuring range of 10 mm.…”

Section: Discussionmentioning

confidence: 98%

Acoustic Roughness Measurement of Railway Tracks: Implementation of a Chord-Based Optical Measurement System on a Train

et al. 2022

View full text Add to dashboard Cite

A large part of the noise emissions from rail traffic originates from rolling noise. This is significantly determined by the surface roughness of the wheel and the rail. To quantitatively assess the noise generation from the wheel–rail contact, it is necessary to measure the surface roughness of the rail network. Direct measurements via trolley devices are usually associated with the need for a free track and limitation in velocity. Indirect measurements of rail roughness, such as measuring axle-box accelerations, enable operation during regular passage but only estimate the acoustic roughness. In this study, the potential of an optical and consequently contact-free measurement method using laser triangulation sensors to measure rail roughness from the train is investigated. The approach can combine the advantage of operation during regular passage with the characteristics of a direct measurement, enabling large-scale monitoring of the rail network. A measurement run with a train was carried out on a meter-gauge track at speeds up to . The results of the optical measurement approach were compared with a tactile reference measurement on the track. The results show good agreement of the new measurement setup for dry rail surface conditions at , with a mean deviation of .

show abstract

Section: Discussionmentioning

confidence: 98%

Acoustic Roughness Measurement of Railway Tracks: Implementation of a Chord-Based Optical Measurement System on a Train

et al. 2022

View full text Add to dashboard Cite

show abstract

“…In [36] and [48], pseudo-random excitation has been used with a shaker. Moreover, excitation by an impact hammer is also used [48], [72]- [75].…”

Section: Three Standardized Measurement Methodsmentioning

confidence: 99%

“…In [36] and [48], pseudo-random excitation has been used with a shaker. Moreover, excitation by an impact hammer is also used [48], [72]- [75]. Both vertical and horizontal setups can be used [7], [23], [76], with the test element mounted in a way which is representative of its use in practice.…”

Section: Three Standardized Measurement Methodsmentioning

confidence: 99%

“…A resilient element can often be represented as a finite cylinder. For example, rubber elements can be treated as a finite rod in the axial direction [48]- [50], or a finite beam [51]- [54] in the transverse direction. Each of these models was limited to one or a few wave types to determine the dynamic stiffness in certain DOFs.…”

Section: Modelling Including Wave Motionmentioning

confidence: 99%

See 1 more Smart Citation

Measurement, Modeling, and Analysis of the Dynamic Properties of Resilient Elements Used for Vibration Isolation

Sun,

Thompson

2023

Journal of Vibration and Acoustics

Self Cite

View full text Add to dashboard Cite

Resilient elements are widely applied for vibration and noise control in many areas of engineering. Their complex dynamic stiffness gives fundamental information to describe their dynamic performance and is required for predicting structure-borne sound and vibration using dynamic modelling. Many laboratory measurement methods have been developed to determine the dynamic properties of resilient elements. This paper presents a review of recent developments of the measurement methods from the perspective of force-displacement relations of the resilient element assembly rather than of their material properties. To provide context, the review begins with an introduction to modelling methods for resilient elements, especially for rubber and rubber-like isolators, and three standardized measurement methods are introduced. Recent developments are then discussed including methods to extend the frequency range, which are mainly developments of the indirect method. Mobility methods, modal-based methods, recent active frequency-based substructuring (FBS) and inverse substructuring (IS) methods to study the dynamic properties of resilient elements are also described. Laboratory test rigs and the corresponding identification methods are outlined. Methods to evaluate nonlinear dynamic properties of resilient elements by laboratory measurements are also discussed. Finally, the review is concluded by discussing advantages and limitations of the existing methods and giving suggestions for future research.

show abstract

“…Yang et al [12] modeled the helical spring using beam elements, considering the interaction between the spring coils and providing the stiffness of the helical spring under compression loads through simulation calculations. Liu et al [13] and others measured a car-quality spring system's vertical and lateral dynamic stiffness and provided the results of various constant preload forces in the 60-600 Hz frequency range. The dynamic stiffness model of the suspension component they built matched well with the actual one.…”

Section: Introductionmentioning

confidence: 99%

Research on the Dynamic Characteristics of Perfluoroalkoxy Alkane Springs

Feng

Cui

et al. 2023

Materials

View full text Add to dashboard Cite

Semiconductor cleaning system ultra-clean flow control pumps are critical equipment in the semiconductor industry. Among them, the perfluoroalkoxy alkane (PFA) spring is a pivotal component to control the pump, and its dynamic performance is crucial to ensure the efficient operation of the system. However, the dynamic performance of the spring is often affected by the operating frequency. This paper studied the effect of different working frequencies on the dynamic property of the spring through compression-cycle experiments under uniaxial sinusoidal excitation. The force–displacement curves under different compression frequencies were fitted to obtain the dynamic stiffness of the PFA spring under different cyclic loading frequencies. The variation in the spring’s hysteresis coefficient was evaluated using the hysteresis curves of different cyclic loading conditions. After 2 million compression experiments, the changes in dynamic stiffness, hysteresis coefficient, and spring height were investigated. The obtained results revealed that, as the frequency increases, the dynamic stiffness of the spring increases. The hysteresis coefficient of the PFA spring is the largest at 10 Hz and the smallest at 6 Hz. Upon conducting 2 million compression tests, it was discovered that the dynamic stiffness experiences the greatest attenuation rate of 4.19% at a frequency of 8 Hz, whereas the hysteresis coefficient undergoes the largest attenuation of 42.1% at a frequency of 6 Hz. The results will help to improve the design and application level of PFA springs.

show abstract

Measurements and modelling of dynamic stiffness of a railway vehicle primary suspension element and its use in a structure-borne noise transmission model

Cited by 9 publications

References 25 publications

Acoustic Roughness Measurement of Railway Tracks: Implementation of a Chord-Based Optical Measurement System on a Train

Acoustic Roughness Measurement of Railway Tracks: Implementation of a Chord-Based Optical Measurement System on a Train

Measurement, Modeling, and Analysis of the Dynamic Properties of Resilient Elements Used for Vibration Isolation

Research on the Dynamic Characteristics of Perfluoroalkoxy Alkane Springs

Contact Info

Product

Resources

About