Structure Buckling Load Interval Analysis of Ventilated Supercavitating Vehicles

2010 ◽  
Vol 452-453 ◽  
pp. 85-88
Author(s):  
Wei Dong Chen ◽  
Ling Zhou ◽  
Wei Guang An
Keyword(s):  
Interval Analysis ◽  
Analysis Method ◽  
Lower And Upper Bounds ◽  
Convex Model ◽  
Thin Cylindrical Shell ◽  
Buckling Loads ◽  
Supercavitating Vehicles ◽  
Interval Analysis Method ◽  
Model Method ◽  
Interval Width

Axial and circumferential critical buckling loads of thin cylindrical shell with stiffened rings are obtained by semi-analytical FEM. Then the interval widths of critical buckling loads which are obtained by interval analysis method are compared to those obtained by convex model method. The lower and upper bounds of axial and circumferential critical buckling loads increase with the increase of number of ring and are larger when the ring is placed on the inside of the shell than that is placed on the outside of the shell. The influence of variety of interval width of each basic variable on the variety of interval widths of critical buckling loads is obtained in this paper.

Interval Analysis Method of Fault Tree Based on Convex Model

2011 ◽  
Vol 314-316 ◽  
pp. 2569-2573
Author(s):  
Yan Ming Xiong ◽  
Jun Li ◽  
Shi Ling Li ◽  
Zhan Ping Yang
Keyword(s):  
Interval Analysis ◽  
Fault Tree ◽  
Evidence Theory ◽  
Simulation Method ◽  
Analysis Method ◽  
Convex Model ◽  
Interval Probability ◽  
Practical Applications ◽  
Interval Analysis Method ◽  
Interval Operators

A novel interval analysis method of fault tree is proposed. Evidence theory is applied to calculate the interval probability of basic events. Convex model is applied to structure the interval operators for interval analysis, and Monte-Carlo simulation method is used to calculate conditional extreme. Simulation result demonstrates that the proposed method is coinciding with the practical applications very well, and can be applied when statistical data are incomplete.

scholarly journals A novel interval analysis method to identify and reduce pure electric vehicle structure-borne noise

2020 ◽  
Vol 475 ◽  
pp. 115258 ◽  
Author(s):  
Hai B. Huang ◽  
Jiu H. Wu ◽  
Xiao R. Huang ◽  
Wei P. Ding ◽  
Ming L. Yang
Keyword(s):  
Electric Vehicle ◽  
Interval Analysis ◽  
Analysis Method ◽  
Interval Analysis Method ◽  
Vehicle Structure

INTERVAL AND SUBINTERVAL ANALYSIS METHODS OF THE STRUCTURAL ANALYSIS AND THEIR ERROR ESTIMATIONS

2006 ◽  
Vol 03 (02) ◽  
pp. 229-244 ◽  
Author(s):  
Y. T. ZHOU ◽  
C. JIANG ◽  
X. HAN
Keyword(s):  
Interval Analysis ◽  
Taylor Expansion ◽  
Truncation Error ◽  
Estimation Methods ◽  
Uncertain Parameters ◽  
Analysis Method ◽  
Interval Analysis Method ◽  
Analysis Methods ◽  
Second Derivatives ◽  
Error Estimations

In this paper, the interval analysis method is introduced to calculate the bounds of the structural displacement responses with small uncertain levels' parameters. This method is based on the first-order Taylor expansion and finite element method. The uncertain parameters are treated as the intervals, not necessary to know their probabilistic distributions. Through dividing the intervals of the uncertain parameters into several subintervals and applying the interval analysis to each subinterval combination, a subinterval analysis method is then suggested to deal with the structures with large uncertain levels' parameters. However, the second-order truncation error of the Taylor expansion and the linear approximation of the second derivatives with respect to the uncertain parameters, two error estimation methods are given to calculate the maximum errors of the interval analysis and subinterval analysis methods, respectively. A plane truss structure is investigated to demonstrate the efficiency of the presented method.

An Interval Analysis for the Mesco Ductile Fracture

2006 ◽  
Vol 324-325 ◽  
pp. 971-974 ◽  
Author(s):  
Chang Hong Liu ◽  
Hu Huang
Keyword(s):  
Confidence Interval ◽  
Ductile Fracture ◽  
Interval Analysis ◽  
Random Parameter ◽  
Interval Number ◽  
Experimental Results ◽  
Analysis Method ◽  
Fracture Characteristics ◽  
Interval Analysis Method

With the concepts of the confidence interval, a random parameter can be transformed into an interval number in the mesco ductile fracture. Hence analyses of the random isolated void model can be used in the interval analysis method. Based on the macro- and mesco-experimental results of four steels, 30CrMnSiA, 40CrNiMoA, No.45 and No.20, the probabilistic fracture characteristics of the four steels are given. Finally the interval isolated void models in the four steels are discussed.

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