Results 131 to 140 of about 253 (177)
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Damping Identification for Mistuned Blisks
Volume 5: 22nd International Conference on Design Theory and Methodology; Special Conference on Mechanical Vibration and Noise, 2010A novel structural damping identification method is presented. The approach is robust with respect to measurement noise and makes use of highly effective reduced-order-models (ROMs). Several different methods are currently available for damping identification.
Darren E. Holland +2 more
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Towards Structural Topology Optimization of Rotor Blisks
Volume 7A: Structures and Dynamics, 2018The current trend in turbomachinery is pushing forward more and more efficient machines, increasing speeds, reducing components mass and improving their vibrational behaviour. Structural topology optimization is a challenging and promising approach to satisfy all these demands, with a very remarkable economic impact.
Meli E +5 more
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Knowledge-Based Process Design Optimisation in Blisk Manufacturing
Volume 7: Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Microturbines, Turbochargers, and Small Turbomachines; Oil & Gas Applications, 2022Abstract The manufacturing process of blade-integrated disks (blisks) represents one of the most challenging tasks in turbomachinery manufacturing. The requirement is to machine complex, thin-walled blade geometries with high aspect ratios made of difficult-to-cut materials. In addition, extremely tight tolerances are required, since the
Landwehr, Markus +3 more
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Effects of Contact Mistuning on Shrouded Blisk Dynamics
Volume 7A: Structures and Dynamics, 2016Mistuning commonly refers to non-cyclically symmetric variations in such an otherwise cyclically-symmetric structure. Mistuning in a blisk due to variations in blade materials and geometry have been studied extensively and are known to have a significant impact on the forced response of blisks.
MITRA, MAINAK +2 more
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Research on the 5-axis Machining of Blisk
Materials Science Forum, 2006The study presents a new method for 5-axis machining of blisk, which consists of both roughing tunnels and finishing blades. The ruled surface is used to approximate the freeform surface of blade, and the boundary contour of the tunnel is then determined.
Chuang Guo Hu +3 more
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Transient Amplitude Amplification of Mistuned Blisks
Journal of Engineering for Gas Turbines and Power, 2015This article discusses the problem of exceeding amplitudes of mistuned structures caused by accelerated traveling waves type excitation, i.e., traveling waves with time variant frequencies. These waves cause resonance passages of, e.g., rotating structures. To calculate the resonance passage a semi-analytical solution is proposed.
Marius Bonhage +3 more
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Data-Driven Identification of Mistuning in Blisks
2021Turbomachinery blisks are nominally cyclic symmetric structures found in modern rocket and aircraft engines and power generation systems. During operation, blisks are subject to traveling-wave excitations due to a combination of rotation and airflow.
Sean T. Kelly +2 more
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2011
A discrete blisk model composed by mass-, spring- and dashpot-elements, the so called Equivalent Blisk Model (EBM) is adapted to the mechanical properties of a real high pressure compressor blisk considering measured vibration data. Aiming to integrate the aerodynamic influences in the EBM, aerodynamic influence coefficients derived from aeroelastic ...
Bernd Beirow, A. Kühhorn, J. Nipkau
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A discrete blisk model composed by mass-, spring- and dashpot-elements, the so called Equivalent Blisk Model (EBM) is adapted to the mechanical properties of a real high pressure compressor blisk considering measured vibration data. Aiming to integrate the aerodynamic influences in the EBM, aerodynamic influence coefficients derived from aeroelastic ...
Bernd Beirow, A. Kühhorn, J. Nipkau
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Research on the Adaptive Machining Technology of Blisk
Advanced Materials Research, 2009Due to different datum position and inevitable distortion from the linear friction welding process, the nominal CAD model from the design stage is no longer suitable for the use of the final NC machining, and that is the main problem for precisely machining complex blisk. In this paper, an adaptive machining approach based on adaptive process model for
Ding Hua Zhang, Ying Zhang, Bao Hai Wu
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Data-Driven Models of Blisk Structures
2023Integrally bladed disks, or blisks, are critical components within compressors of modern turbomachinery, and during operation can exhibit complex dynamic behaviors. Understanding and accurately modeling these dynamics is crucial for blisk design and safe operation.
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