All-round responses and boundaries of a shaft and dry friction damper assembly

Huang, Zhonghe; Tan, Jianping; Liu, Chuliang; Huang, Shengfu

doi:10.1016/j.ijnonlinmec.2022.103977

Cited by 7 publications

(3 citation statements)

References 31 publications

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“…1, is a multi-shaft system that transfers power from the middle gear to the tail propeller. Flexible couplings are used to connect the slender, thin-walled shafts, while dry friction dampers are employed to suppress the first order bending resonance of the shafts [3]. Due to the dynamic characteristics of complex multi-component mechanisms, designers face challenges in intuitively evaluating the impact of parameter changes on the driveline.…”

Section: Introductionmentioning

confidence: 99%

Development of a parametric design and optimization platform for a helicopter tail-rotor driveline

Huang,

Dong,

Sang

et al. 2024

Preprint

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A helicopter tail-rotor driveline incorporates multiple shafts, couplings, and dampers to transmit power from the middle gear to the tail propeller. Designers face a challenge in adjusting parameters for these components due to a lack of reference information on parameter design and optimization. To address this gap, this study presents a parametric design software platform for facilitating parameter analysis and optimization. A mathematical model is developed to capture the system behavior and precise boundary conditions, considering all relevant components and their interactions. The software design issues, basic modules, architecture, and interfaces are developed using MATLAB App Designer. Generative design is employed to create a damper's parameters optimization function, combining a design-driven process with analytical calculations and expandable multi-objective algorithms. A numerical calculation module and a response analysis module are designed to present comprehensive dynamic responses. The software is utilized to simulate a helicopter tail-rotor driveline, providing insights into multi-stage damping characteristics and the combined effects of rub impact and misalignment. A multi-objective optimization case is conducted by generative design module to enhance damping and durability of the damper. The simulation results of the software are validated using test results from a test rig designed to mimic an actual helicopter tail-rotor driveline. This study serves as a valuable reference for software development in shaft/damper systems and similar rotor machinery.

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Section: Introductionmentioning

confidence: 99%

Development of a parametric design and optimization platform for a helicopter tail-rotor driveline

Huang,

Dong,

Sang

et al. 2024

Preprint

Self Cite

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“…To overcome this issue, frequency-domain methods, especially harmonic balance method (HBM) [22], have been developed for ADFDs-rotor systems. Huang et al [23] approximated the steady-state rotor responses thorough the HBM and investigated the variations of all-round boundaries parametrically. In their studies, the friction forces were assumed to be of Coulomb type.…”

Section: Introductionmentioning

confidence: 99%

Vibration analysis of dual rotor system equipped with active friction dampers based on harmonic balance method and sensitivity analysis

Jiang,

Zhang,

Gao

et al. 2024

Preprint

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Numerical investigations are essential in appropriately determining normal forces for active dry friction dampers (ADFDs) within rotor systems, although existing methods suffer from the deficits of low-efficiency and over-simplifications. Within this paper, a harmonic-balance-based approach is proposed to efficiently obtain the responses of ADFDs-dual rotor system and a local sensitivity analysis is developed together with it to directly visualize the influences of ADFDs. The fixed-interface mode synthesis method and the trajectory tracing method are first utilized to reduce the system dimension. Then, a novel sampling strategy is proposed for the harmonic balance procedure to guarantee the orthogonality of Fourier basis. The resultant nonlinear equation is solved by the arclength continuation technique. To visually present the variation of rotor responses as the normal force of ADFD changes, a local sensitivity analysis method is developed together with the harmonic-balance-based solver. The frequency-domain sensitivity coefficients are derived analytically to facilitate computation of sensitivities. Numerical validations are carried to show the efficiency and accuracy of the developed method. The influences of ADFDs on rotor responses are discussed both numerically and experimentally. It is found that, due to the multiple excitations in dual rotor system, rotor whirl motions could exhibit the characteristics of multi-valued frequencies. The influences of ADFD on rotor responses are related to the rotational speeds, the ADFD normal forces and the ADFD installation positions. The developed method could intuitively show the influences of these factors on rotor vibration suppression, which provides an efficient tool for parameter optimization.

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“…In both Dzygadlo's and Ozaydin's work, the mass of the damper ring was neglected and the shaft/damper interaction was characterized by idealized friction force models. Huang et al 23,24 investigated the dynamic characteristics of the segmented supercritical helicopter drive shafts with flexible couplings and the dry friction dampers by proposing a dual rub-impact model for the shaft/damper interaction. Time-domain responses under constant rotational speeds with different pre-tightening forces were obtained via an improved Adams-Bashforth method.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dynamics of asymmetrically supported supercritical rotor equipped with a dry friction damper

Wang

Song

Cao³

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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To suppress the excessive transcritical vibration of a supercritical rotor, dry friction damper is a popular choice especially in rotorcraft and aero-engine design. In the current work, we focus on the nonlinear dynamics of asymmetrically supported supercritical rotor equipped with a dry friction damper and the influence of support asymmetry on damper’s performance. Governing equations of the rotor/damper system, which fully consider the nonlinear rub-impact and side dry friction effects, are derived. Typical results of symmetrically supported rotor/damper systems are firstly demonstrated and quantitatively compared with experimental counterparts to confirm the predicting capability of the nonlinear dry friction damper model. Afterward, influences of asymmetric direct stiffness and skew-symmetric cross-coupling stiffness are discussed. It is found that direct stiffness asymmetry deteriorates the transcritical vibration attenuation capability of the damper but reduces the width of transcritical region. For system with a severer direct stiffness asymmetry, a larger pre-tightening force is suggested to be imposed. Besides, unstable self-excited vibration induced by skew-symmetric cross-coupling stiffness is found to be well-limited by the dry friction damper within entire interested rotational speed range. Moreover, during critical speed transition, the self-excited frequency component is completely suppressed.

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All-round responses and boundaries of a shaft and dry friction damper assembly

Cited by 7 publications

References 31 publications

Development of a parametric design and optimization platform for a helicopter tail-rotor driveline

Development of a parametric design and optimization platform for a helicopter tail-rotor driveline

Vibration analysis of dual rotor system equipped with active friction dampers based on harmonic balance method and sensitivity analysis

Nonlinear dynamics of asymmetrically supported supercritical rotor equipped with a dry friction damper

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