Vibration Response Characteristics of Bladed Disk With Continuous Ring Type Structure Losing Shroud and Stab

2010 ◽  
Author(s):  
Yasutomo Kaneko ◽  
Kazushi Mori ◽  
Hiroharu Ohyama
Keyword(s):  
Vibration Response ◽  
Type Structure ◽  
Analysis Method ◽  
Simple Analysis ◽  
Element Analysis ◽  
Disk Model ◽  
Continuous Ring ◽  
Ring Type ◽  
Response Characteristics ◽  
Bladed Disk

This paper presents a simple analysis method for predicting vibration response characteristics of a bladed disk with continuous ring type structure losing a shroud or a shroud and a stab between two blades. This loss introduces a mistuning of the system and the whole bladed disk model must be used to conduct the study. However, the vibration modes change regularly from a sine and a cosine mode, if the bladed disk consists of many blades. By utilizing this phenomenon, the simple formulation of vibration response of a bladed disk can be derived. Second, the parametric study on the vibration response characteristics of a bladed disk losing a shroud or a shroud and a stab is carried out extensively, utilizing the analysis method proposed here. From the calculated results, the vibration response characteristics of a bladed disk are clarified for both of resonant vibration and random vibration. Lastly, the results calculated by the simple analysis method proposed are compared with the results obtained from FEA (Finite Element Analysis) in order to verify the validity of the analysis method.

scholarly journals Damping Characteristics of Bladed Disk with Continuous Ring Type Structure

2011 ◽  
Vol 5 (8) ◽  
pp. 1637-1649
Author(s):  
Yasutomo KANEKO ◽  
Kazushi MORI ◽  
Hiroharu OHYAMA
Keyword(s):  
Type Structure ◽  
Continuous Ring ◽  
Ring Type ◽  
Bladed Disk ◽  
Damping Characteristics

scholarly journals A Reduced-Order Model of Detuned Cyclic Dynamical Systems With Geometric Modifications Using a Basis of Cyclic Modes

2010 ◽  
Vol 132 (11) ◽  
Author(s):  
Moustapha Mbaye ◽  
Christian Soize ◽  
Jean-Philippe Ousty
Keyword(s):  
Reduction Method ◽  
Reduced Order Model ◽  
Cyclic Symmetry ◽  
Order Model ◽  
Element Analysis ◽  
Disk Model ◽  
Reduced Order ◽  
Bladed Disk ◽  
Forced Responses ◽  
Sector Matrix

A new reduction method for vibration analysis of intentionally mistuned bladed disks is presented. The method is built for solving the dynamic problem of cyclic structures with geometric modifications. It is based on the use of the cyclic modes of the different sectors, which can be obtained from a usual cyclic symmetry modal analysis. Hence the projection basis is constituted; as well as, on the whole bladed disk, each sector matrix is reduced by its own modes. The method is validated numerically on a real bladed disk model, by comparing free and forced responses of a full model finite element analysis to those of a reduced-order model using the new reduction method.

scholarly journals Optimization of Factors Affecting Vibration Characteristics of Unbalance Response for Machine Motorized Spindle Using Response Surface Method

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Elhaj A. I. Ahmed ◽  
Li Shusen
Keyword(s):  
Response Surface ◽  
Optimization Method ◽  
Vibration Characteristics ◽  
Vibration Response ◽  
Motorized Spindle ◽  
Element Analysis ◽  
Factors Affecting ◽  
Response Characteristics ◽  
Highly Sensitive ◽  
Inner Diameter

In this study, the response surface (RS) method and forced rotordynamic analyses together with Finite-Element-Analysis (FEA) have been established to optimize the factors affecting the vibration characteristics. The spindle specification, bearings locations, cutting force, and motor-rotor unbalance mass are proposed to represent the design factors and then they are utilized to develop Machine Motorized Spindle (MMS). The FEA-based Design of Experiment (DOE) is adopted to simulate the output responses with the input factors, wherein these DOE design points are used to carry out the RS models to visualize more obvious factors affecting the dynamic characteristics of MMS. The sensitivities of these factors and their contributions to the vibration of imbalance response have been evaluated by using the RS models. The simulation results show that the motor-rotor shaft inner diameter, the distance of the back bearing location, and the rotating unbalance-mass are highly sensitive to the vibration characteristics compared to the other factors. It is found that more than two-fifths of total vibration response amplitude has been conducted by induced rotating imbalance mass. The results also showed that the proposed factors optimization method is practicable and effective in improving the vibration response characteristics.

Investigation of Coriolis Effect on Vibration Characteristics of a Realistic Mistuned Bladed Disk

2011 ◽  
Author(s):  
Jianqiang Xin ◽  
Jianjun Wang
Keyword(s):  
Coriolis Force ◽  
Vibration Characteristics ◽  
Bladed Disks ◽  
Disk Model ◽  
Coriolis Forces ◽  
Response Characteristics ◽  
Bladed Disk ◽  
Damping Matrix ◽  
Disk Rotation ◽  
Speed Effect

Mistuning, which refers to inevitable variations in blades properties, will change the vibration of bladed disks dramatically. Bladed disks are exposed to effects of forces caused by bladed disk rotation, such as centrifugal and Coriolis forces. However, there is little research on the vibration behavior of a realistic bladed disk with Coriolis force. An investigation of the speed effect, i.e., the effects of centrifugal and Coriolis forces, on the vibration characteristics of a realistic mistuned bladed disk model is presented in this paper. Finite element method (FEM) is used to obtain the system mass, stiffness and damping matrix. The effects of Coriolis force and centrifugal force on the modal frequency and harmonic response characteristics of tuned bladed disk are investigated first, then the modal localization and response characteristics of mistuned bladed disk are researched. This investigation indicates that: Coriolis force has efficient influences on the modal and response characteristics of a realistic mistuned bladed disk: it can both increase and decrease the localization of the mistuned bladed disk for different situations.

scholarly journals Study on vibration response characteristics of mistuned bladed disk (Mistuning phenomena evaluated by vibratory stress)

2016 ◽  
Vol 82 (837) ◽  
pp. 15-00537-15-00537
Author(s):  
Yasutomo KANEKO ◽  
Masamichi MIYAKE ◽  
Kazushi MORI ◽  
Hiroharu OOYAMA
Keyword(s):  
Vibration Response ◽  
Response Characteristics ◽  
Bladed Disk
Sign in / Sign up

Export Citation Format

Share Document