Studies on the Determination of Natural Frequencies of Industrial Turbine Blades

Bhat, M.M.; Ramamurti, V.; Sujatha, C.

doi:10.1006/jsvi.1996.0508

Cited by 10 publications

(2 citation statements)

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“…Almost all of boundary involve difficulties including transonic, viscous and unsteady at the same time. As a result to study forced vibration mechanism, always in response to these difficulties, which based on the establishment of the aerodynamic model for assumptions numerically, and some progress has been made [5][6][7]。 Transfer matrix method and finite element method. Transfer matrix method is an effective engineering calculation method to calculate the beam shafting vibration and widely used.…”

Section: Modern Methods Of Dynamic Analysis Of the Blade Systemmentioning

confidence: 99%

A Review of the Research on Aeroelasticity in Aero Turbomachinery

2013

AMR

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Aeroelasticity in the form of blade flutter is a major concern for designers in the field of turbomachinery. This paper presents a review of the research and development on blade flutter modeling, including the unsteady aerodynamic model, the structural model and flutter prediction methods. Based on the presentation of these models, the fundamental mechanism and effects of different treatments are discussed. At the end of paper, some deficiencies in the research of flutter and difficulties in modeling fluid-solid coupling effects are pointed out, to which attention should be paid in future.

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Section: Modern Methods Of Dynamic Analysis Of the Blade Systemmentioning

confidence: 99%

A Review of the Research on Aeroelasticity in Aero Turbomachinery

2013

AMR

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“…Thus, attaining reliable and accurate results from this method requires high-precision design and implementation of boundary conditions. So far, according to the importance of modal analyses of blades, several efforts have been made to evaluate the natural frequencies of blades (Bhat et al, 1996;Li et al, 2016;Marugabandhu & Griffin, 2003;Sinha & Turner, 2011;Wang et al, 2014;Yang et al, 2014). In this regard, Kim and Lee (2014) have studied modal characteristics and fatigue strength of compressor blades.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical modal analysis of the first and second stage compressor blades

Ghoreishi¹,

Salari²,

Pourhosseini³

et al. 2019

10.5267/j.esm

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In this paper, the first and second stage compressor blades of a gas turbine were studied by the experimental and numerical modal analyses. At first, the geometric models of these blades were generated by the 3D scanner and then the mode shapes and the natural frequencies of each blade were extracted by a series of numerical modal analyses. The numerical results were compared with the data obtained from the experimental modal analysis and the validity and accuracy of the developed numerical models were confirmed. Unlike most studies that use fixed-free boundary condition for performing a modal analysis, this objective was pursued by applying a free-free boundary condition. This study also investigated the effect of using wax or glue for mounting the accelerometer on the blade by assessing the FRF curves obtained from the modal tests in the frequency range of 0-10000 Hz. The sensitivity of the test results to applying free-free boundary condition, the number of accelerometers and their positions were investigated by defining three modal test configurations. The results obtained by these test configurations were compared with the results of numerical analyses and finally, the best configuration for the modal test of the studied compressor blade was determined.

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