scholarly journals RANDOM RESPONSE ANALYSIS OF HYSTERETIC SYSTEM UNDER AMPLITUDE-NONSTATIONARY EXCITATION

1984 ◽  
Vol 335 (0) ◽  
pp. 15-21
Author(s):  
MASANORI IZUMI ◽  
MASAHIKO KIMURA
Keyword(s):  
Response Analysis ◽  
Random Response ◽  
Hysteretic System

Random Response of a Sluice Gate Support

1991 ◽  
Author(s):  
W. Q. Feng ◽  
T. C. Huang ◽  
W. J. Liu ◽  
G. X. Dong
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Extended Finite Element Method ◽  
Linear Structure ◽  
Response Analysis ◽  
Random Response ◽  
Extended Finite Element ◽  
Sluice Gate ◽  
Excitation Field ◽  
Element Method

Abstract By the use of the extended finite element method the analysis of the random response of a linear structure to a continuous excitation field, random in time and space, is presented in this paper. The extended finite element method includes the formulation for obtaining the equivalent node force power spectrum. The corresponding computer program has been produced. A random response analysis of a sluice gate support shows satisfactory agreement with the experiment results.

scholarly journals Response analysis of random base excitation ona magnetic bearing rotor system

2019 ◽  
Vol 293 ◽  
pp. 04004
Author(s):  
Jinping Chen ◽  
Li Zhang ◽  
Yanyan Luo ◽  
Haining Zhang ◽  
Jun Liu
Keyword(s):  
Collision Detection ◽  
Random Excitation ◽  
Magnetic Bearing ◽  
Rotor System ◽  
Response Analysis ◽  
Random Response ◽  
Practical Application ◽  
External Disturbances ◽  
Response Characteristics ◽  
Auxiliary Bearing

The magnetic bearing-rotor system is subject to various external disturbances in practical application. Under certain control conditions, the random response characteristics of the magnetic bearing-rotor system are a particular concern. This paper analyzes the response characteristics of base of the magnetic bearing subjected to acceleration random excitation in the horizontal direction. First, the magnetic bearing-rotor system model is deduced. Then, the random response of the rotor under acceleration random excitation is derived. The probability of the collision of the rotor between the auxiliary bearing is calculated and the example is given. The paper conclusion provides a theoretical basis for the collision detection and prediction of the magnetic bearing-rotor system.

Resonant Response and Random Response Analysis of Mistuned Bladed Disk Consisting of Directionally Solidified Blade

2015 ◽  
Author(s):  
Yasutomo Kaneko ◽  
Kazushi Mori ◽  
Hiroharu Ooyama
Keyword(s):  
Elastic Constants ◽  
Rupture Strength ◽  
Turbine Blades ◽  
Response Analysis ◽  
Resonant Response ◽  
Random Response ◽  
Directionally Solidified ◽  
Columnar Crystal ◽  
Bladed Disk ◽  
Columnar Grains

Recently, DS (Directionally Solidified) and SC (Single Crystal) alloys have been widely applied for gas turbine blades instead of CC (Conventional Casting) alloys, in order to improve the creep rupture strength. The DS blade consists of several columnar grains of SC, where the growing direction of the columnar crystal is set to the direction of the centrifugal force. Because the elastic constants of the DS blade are anisotropic, the mistuning characteristics of the bladed disk consisting of the DS blades seem to be different from those of the CC blade. In this study, the resonant response and random response analysis of mistuned bladed disks consisting of the DS blades are carried out, considering the deviations of the elastic constants and the crystal angle of the DS blade. The FMM (Fundamental Mistuning Model) and the conventional modal analysis method are used to analyze the vibration response of the mistuned bladed disk. The maximum resonant response and random response of the mistuned bladed disk consisting of the DS blades are estimated by the Monte Carlo simulation combining with the response surface method. These calculated results for the DS blades are compared with those of the CC blades. From these results, it is concluded that the maximum response of the mistuned bladed disk consisting of the DS blades is the nearly same as that of the CC blades. However, in the design of the tuned blade, where the blade resonance should be avoided, it is necessary to consider that the range of the resonant frequency of the DS blade becomes wider than that of the CC blade.

Reliability Comparison of Passive Dissipation Structure based on Random and Monte Carlo Analysis

2011 ◽  
Vol 71-78 ◽  
pp. 1902-1906
Author(s):  
Qing Guang He ◽  
Yong Feng Du
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Analysis ◽  
Response Analysis ◽  
Random Response ◽  
Statistical Parameters ◽  
Performance Function ◽  
Dynamic Reliability ◽  
Dissipation Structure ◽  
Implicit Performance Function ◽  
Pseudo Excitation

Random response of dissipation structure was obtained by means of pseudo-excitation method, and dynamic reliability was analyzed based on random response analysis. In contract that time-dependent reliability was studied by use of Monte Carlo approach. A numerical solution method with iterative analysis procedure for implicit performance function was applied to carry out the relevant statistical parameters. A 6-storey building as an example was analyzed to compare the two methods about reliability.

Random Response Analysis for Nonlinear Systems of Composite Laminates

2011 ◽  
Vol 415-417 ◽  
pp. 56-61
Author(s):  
Feng Xiang You ◽  
Fei Zhang ◽  
Buo Lei Zuo
Keyword(s):  
Nonlinear Systems ◽  
Composite Laminates ◽  
Response Analysis ◽  
Random Response ◽  
Random Parameters ◽  
Engineering Structures ◽  
Central Difference ◽  
Central Difference Method ◽  
Random Responses ◽  
Random Nature

Geometric parameters of composite materials often have a random nature in engineering structures. How to study random response and statistical properties of nonlinear systems with random parameters has a very important significance for reliability and optimization of structural design. In this paper, perturbation method and random central difference method are explored to establish composite nonlinear vibration equations and computational model to study random responses of nonlinear systems with random parameters under deterministic loading of the composite laminates, numerical examples illustrate the correctness of the algorithm.

scholarly journals Nonlinear Reduced Order Random Response Analysis of Structures with Shallow Curvature

AIAA Journal ◽  
2006 ◽  
Vol 44 (8) ◽  
pp. 1767-1778 ◽  
Author(s):  
Adam Przekop ◽  
Stephen A. Rizzi
Keyword(s):  
Response Analysis ◽  
Random Response ◽  
Reduced Order
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