Analytical and finite element modelling of long plate mode jumping behaviour

Hofmeyer, H.; Courage, J

doi:10.1016/j.tws.2013.06.017

Cited by 11 publications

(3 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, based on perturbed theory, the feasibility of diagnosis of structural preload state can be analyzed from the change in structural mode shape. Perturbed theory shows that after small changes in structural parameters, the natural frequency and mode shape of the structure will also change accordingly, and the modal step phenomenon may occur [24]. The modal mode step refers to the sequence exchange or dislocation between the modal modes of the structural system, which is manifested as the conversion of the low-order modal mode vector before perturbation into the higher-order modal mode vector after perturbation.…”

Section: Structural Preload State Diagnosis Theorymentioning

confidence: 99%

See 1 more Smart Citation

Research on the Influence of Disc–Drum Connection Bolt Preloading Rotor Assembly Modal Characteristics and Diagnosis Technology

Wang,

Xue,

Zhang

et al. 2024

Machines

View full text Add to dashboard Cite

The drum rotor of an aero-engine is connected by one or multiple mounting edges through bolts, and their dynamics are significantly influenced by the preload state of the bolts. Long working hours in challenging environments can result in the deterioration of bolt pre-tightening during assembly or service, which impacts the rotor’s dynamic stability and overall performance. Currently, there are no available methods for detecting the dynamic characteristics of the drum connection components. This paper analyzes the impact of the natural characteristics of the drum composite structure of a high-pressure aero-engine turbine based on the refined finite element method when the preloading state changes. Two conditions of deviation and uneven stiffness distribution were applied to the connected components of the drum. The analysis focused on the impact of the pre-tightening state on its natural frequency. After analyzing the feasibility of identifying the pre-tightening state, two methods are proposed. These methods focus on changes in natural frequency and mode shape, specifically the sensitive natural frequency change method and the mode step change method. The methods proposed in this paper can serve as a reference for evaluating the quality of assembling complex disc–drum structures with multiple bolt connections.

show abstract

Section: Structural Preload State Diagnosis Theorymentioning

confidence: 99%

“…According to the canonical perturbation theory [24], the eigenvalues and eigenvectors can be expanded into power series based on ξ.…”

Section: Structural Preload State Diagnosis Theorymentioning

confidence: 99%

Research on the Influence of Disc–Drum Connection Bolt Preloading Rotor Assembly Modal Characteristics and Diagnosis Technology

Wang,

Xue,

Zhang

et al. 2024

Machines

View full text Add to dashboard Cite

show abstract

“…[29][30][31][32] Some simplified approaches on the structural profiles were also made, such as equivalent cross-sections for engineering applications. [33][34][35] For perforated plates with opposite free edges, the local stress and strain distributions along the cutout edges are not significant to affect the buckling behaviour of the plate. The buckling behaviour is more of a global one, thus less sensitive to local elements.…”

Section: Introductionmentioning

confidence: 99%

A semi-analytical model on the critical buckling load of perforated plates with opposite free edges

Wei-gang

Wang

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

Perforated plates are widely used in thin-walled engineering structures, for example, for lightweight designs of structures and access for installation. For the purpose of analysis, such perforated plates with two opposite free edges might be considered as a series of successive Timoshenko beams. A new semi-analytical model was developed in this study using the Timoshenko shear beam theory for the critical buckling load of perforated plates, with the characteristic equations derived. Results of the proposed modelling were compared with those obtained by FEM and show good agreement. The influence of the dividing number of the successive beams on the accuracy of the critical buckling load was studied with respect to various boundary conditions. And the effect of geometrical parameters, such as the aspect ratio, the thickness-to-width ratio and the cutout-to-width ratio were also investigated. The study shows that the proposed semi-analytical model can be used for buckling analysis of a perforated plate with opposite free edges with the capacity to consider the shear effect in thick plates.

show abstract

Nonlinear Postbuckling Behavior of a Simply Supported, Uniformly Compressed Rectangular Plate

Kravchenko

Myntiuk

2020

Integrated Computer Technologies in Mechanical Engineering

View full text Add to dashboard Cite

Analytical and finite element modelling of long plate mode jumping behaviour

Cited by 11 publications

References 29 publications

Research on the Influence of Disc–Drum Connection Bolt Preloading Rotor Assembly Modal Characteristics and Diagnosis Technology

Research on the Influence of Disc–Drum Connection Bolt Preloading Rotor Assembly Modal Characteristics and Diagnosis Technology

A semi-analytical model on the critical buckling load of perforated plates with opposite free edges

Nonlinear Postbuckling Behavior of a Simply Supported, Uniformly Compressed Rectangular Plate

Contact Info

Product

Resources

About