Modelling Friction Contacts in Structural Dynamics and its Application to Turbine Bladed Disks

Firrone, Christian Maria; Zucca, Stefano

doi:10.5772/25128

Cited by 10 publications

(7 citation statements)

References 39 publications

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“…12, the FRFs show significant improvement. 6 Moreover, the overall errors are shown in Fig. 14 to decrease with the maximum error around resonance falling below 15%.…”

Section: Resultsmentioning

confidence: 92%

“…In this context, modeling of frictional contact differs depending on assumptions as to whether, the tangential motion on the interface is one-dimensional or two-dimensional, coupling is assumed for tangential planar motion, and if contact pressure temporally evolves across the interface. Firrone and Zucca compared features of the responses obtained by employing different formulations in [6]. Experimental evidence [7,8] has shown that a correct simulation of joint behavior must take into account time varying contact pressure across the interface.…”

Section: Introductionmentioning

confidence: 99%

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A frequency-domain reduced order model for joints by hyper-reduction and model-driven sampling

Morsy

Kast²,

Tiso³

2023

Mechanical Systems and Signal Processing

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“…12, the FRFs show significant improvement. 6 Moreover, the overall errors are shown in Fig. 14 to decrease with the maximum error around resonance falling below 15%.…”

Section: Resultsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

A frequency-domain reduced order model for joints by hyper-reduction and model-driven sampling

Morsy

Kast²,

Tiso³

2023

Mechanical Systems and Signal Processing

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“…Such curves are often used to extract the equivalent stiffness and damping properties of frictional interfaces to build the dynamic model (such as the Jenkins model, as shown in Fig. 11, the Iwan model, or the Valanis model) for the bolted structure [52]. Thus, test rigs that can measure the hysteresis characteristic of interfaces in different conditions are widely needed, which was also proposed by the ASME Research Committee in 2019 [53].…”

Section: Measurements Of the Hysteresis Damping 31 The Basic Theory F...mentioning

confidence: 99%

Experimental studies on the energy dissipation of bolted structures with frictional interfaces: A review

Wang,

Ma,

Hong

et al. 2024

Friction

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Bolted joints play a more and more important role in the structure with lighter weight and heavier load. This paper aims to provide an overview of different experimental approaches for the dynamic behavior of structures in the presence of bolted joints, especially the energy dissipation or damping at frictional interfaces. The comprehension of energy dissipation mechanisms due to friction is provided first, while the key parameters and the measurement techniques, such as the excitation force, the preload of the bolt, or the pressure at the interfaces, are briefly introduced. Secondly, the round-robin systems aim to measure the hysteresis parameters of the frictional joints under tangential loads are reviewed, summarizing the basic theory and the strategies to apply the excitation force or acquire the response in different testing systems. Followed by parameter identification strategies for bolted structures, the test rigs with one or more simplified bolted joints are summarized to give an insight into the understanding of typical characteristics of bolted structures, which are affected by the presence of friction. More complex test rigs hosting real-like or actual engineering structures with bolted lap or flange joints are also introduced to show the identification process of the dynamic characteristics of bolted connections employed in specific applications. Based on the review paper, researchers can get the basic knowledge about the experimental systems of the bolted structures, especially several classical round robin systems, such as the Gaul resonator and widely used Brake-Reuß beam system. Readers can take advantage of this background for more creative and effective future studies, make more progress on the study of assembled structures and understand the influence of bolting frictional connections on the dynamic response better.

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“…In this context, modelling of frictional contact differs depending on assumptions as to whether, the tangential motion on the interface is one-dimensional or two-dimensional, coupling is assumed for tangential planar motion, and if contact pressure temporally evolves across the interface. Firrone and Zucca compared features of the responses obtained by employing different formulations in [6]. Brake et al [7] showed experimentally that a correct simulation of joint behavior must take into account time varying contact pressure across the interface.…”

Section: Introductionmentioning

confidence: 99%

A Reduced Order Model for Joint Assemblies by Hyper-Reduction and Model-Driven Sampling

Morsy¹,

Kast²,

Tiso³

2022

Preprint

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The dynamic behavior of jointed assemblies exhibiting friction nonlinearities features amplitude-dependent dissipation and stiffness. To develop numerical simulations for predictive and design purposes, macro-scale High Fidelity Models (HFMs) of the contact interfaces are required. However, the high computational cost of such HFMs impedes the feasibility of the simulations. To this end, we propose a model-driven method for constructing hyper-reduced order models of such assemblies. Focusing on steady-state analysis, we use the Multi-Harmonic Balance Method (MHBM) to formulate the equations of motion in frequency domain. The reduction basis is constructed through solving a set of vibration problems corresponding to fictitious interface conditions. Subsequently, a Galerkin projection reduces the order of the model. Nonetheless, the necessary fine discretization of the interfaces represents a bottleneck for achieving high speedups. For this reason, we implement an adapted Energy Conserving Weighing and Sampling (ECSW) technique for Hyper Reduction (HR), thereby allowing significant speedups for meshes of arbitrary fineness. This feature is particularly advantageous since analysts typically encounter a trade-off between accuracy and computational cost when deciding on the mesh size, whose estimation is particularly challenging for problems of this type. To assess the accuracy of our method without resorting to the HF solution, we propose an error indicator with thresholds that have proven reliable in our analyses. Finally, the accuracy and efficiency of the method are demonstrated by two case studies.

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Modelling Friction Contacts in Structural Dynamics and its Application to Turbine Bladed Disks

Cited by 10 publications

References 39 publications

A frequency-domain reduced order model for joints by hyper-reduction and model-driven sampling

A frequency-domain reduced order model for joints by hyper-reduction and model-driven sampling

Experimental studies on the energy dissipation of bolted structures with frictional interfaces: A review

A Reduced Order Model for Joint Assemblies by Hyper-Reduction and Model-Driven Sampling

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