Bend and Adjacent Span Reduction Factors

1984 ◽  
Vol 106 (4) ◽  
pp. 416-420
Author(s):  
M. Z. Lee
Keyword(s):  
Structural Analysis ◽  
Computer Program ◽  
Fundamental Frequency ◽  
Formal Analysis ◽  
Experimental Procedure ◽  
Analysis Computer ◽  
Analysis Computer Program ◽  
Good Agreement ◽  
Reduction Factors

A semi-analytical and computer experimental procedure is described for developing the bend and adjacent span reduction factors for an alternate method of seismic restraint spacing, based on stress and frequency invariance considerations. The results, in terms of fundamental frequency, deflection, stress and support loads are shown to be in good agreement with, or more conservative than, those obtained from formal analysis of a quasi-system with bend using a piping structural analysis computer program. A simple curve is presented relating the bend and the adjacent span reduction factors obtained from the method.

Joint and Cross Acceptances for Cross-Flow-Induced Vibration—Part II: Charts and Applications

2000 ◽  
Vol 122 (3) ◽  
pp. 355-361 ◽  
Author(s):  
M. K. Au-Yang
Keyword(s):  
Finite Element ◽  
Structural Analysis ◽  
Boundary Conditions ◽  
Computer Program ◽  
Cross Flow ◽  
Flow Induced Vibration ◽  
Modal Coupling ◽  
Analysis Computer ◽  
Flow Turbulence ◽  
Analysis Computer Program

Using closed-form and finite element solutions derived in Part I of this paper together with a standard commercial finite element structural-analysis computer program, the joint and cross acceptances for tubes and beams with different boundary conditions are calculated as a function of the correlation length up to 10 times the length of the structures. The results are presented in the form of charts. Steps are given to show how to use these charts together with standard commercial finite-element structural-analysis computer programs to estimate the responses of single and multi-span tubes and beams to cross-flow turbulence-induced vibration. The importance of cross-modal coupling for multi-supported beams is investigated. Examples are given. [S0094-9930(00)03303-5]

Recent developments of the NESSUS probabilistic structural analysis computer program

1992 ◽  
Author(s):  
Y.-T. WU ◽  
H. MILLWATER ◽  
T. TORNG ◽  
B. THACKER ◽  
D. RIHA ◽  
...  
Keyword(s):  
Structural Analysis ◽  
Computer Program ◽  
Recent Developments ◽  
Analysis Computer ◽  
Analysis Computer Program

The Analysis and Design of a Fire Engine Safety Cab Using Finite Element Methods

1977 ◽  
Vol 191 (1) ◽  
pp. 187-193 ◽  
Author(s):  
J. C. Miles ◽  
G. A. Wardill
Keyword(s):  
Finite Element ◽  
Computer Program ◽  
Three Dimensional ◽  
Analysis And Design ◽  
Vehicle Structure ◽  
Collapse Analysis ◽  
Incremental Formulation ◽  
Analysis Computer ◽  
Fire Engine ◽  
Analysis Computer Program

A three dimensional structural collapse analysis computer program is described, and illustrated by reference to a safety vehicle structure analysed and designed using the program. The particular problems of large displacements and material non-linearity are accounted for, and a method of estimating the permanent set which results after impact is described. Based on an incremental formulation of the conventional finite-element method, the computer program is capable of tracing the complete load deflection characteristics of a structure up to and beyond the point of collapse.

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