Pose determination of circular cylinders using elliptical and side projections

1991 ◽  
Author(s):  
Shiu ◽  
Huang
Keyword(s):  
Circular Cylinders ◽  
Pose Determination

Critical Assessment of the Least Square Error Method Used in Derivation of Morison’s Force Coefficients

1994 ◽  
Vol 116 (1) ◽  
pp. 1-6 ◽  
Author(s):  
G. Najafian ◽  
R. Burrows
Keyword(s):  
Critical Assessment ◽  
Least Square ◽  
New Method ◽  
Statistical Moments ◽  
Circular Cylinders ◽  
Wave Forces ◽  
Lower Intensity ◽  
Maximum Correlation ◽  
Error Method

The least square error (LSE) method is frequently used in determination of Morison’s coefficients from the analysis of measured wave forces on circular cylinders. It will be proved in this paper that Morison’s coefficients determined from the LSE method always lead to predicted forces which have smaller variances (2nd-order statistical moments) than those of the measured forces. In other words, it is proved that predicted forces from this method are of lower intensity compared to the measured forces, and hence can be unconservative. A new method, termed the maximum correlation (MC) method, has been introduced. This method has all the advantages of the LSE method, but leads to predicted forces whose variances are equal to those of the measured forces.

A Method for the Experimental Determination of Residual Stresses in Axisymmetric Composite Cylinders

1992 ◽  
Vol 114 (1) ◽  
pp. 90-96 ◽  
Author(s):  
F. G. Rammerstorfer ◽  
F. D. Fischer
Keyword(s):  
Residual Stresses ◽  
Experimental Determination ◽  
Arbitrary Number ◽  
Analytical Procedure ◽  
Circular Cylinders ◽  
Composite Cylinders ◽  
Long Cylinder

An analytical procedure applicable for the experimental determination of initially existing residual stresses in long composite circular cylinders is derived within the framework of the drilling and turning technique. The method is demonstrated for a long cylinder composed of two different materials. An extension to cylinders composed of an arbitrary number of circular cylindrical layers can easily be derived in analogy to the described procedures.

Heat Conduction in Deformed Initially Isotropic Materials

1963 ◽  
Vol 30 (4) ◽  
pp. 628-629
Author(s):  
G. C. Sih ◽  
G. F. Smith
Keyword(s):  
Heat Conduction ◽  
Temperature Distribution ◽  
Heat Flow ◽  
Isotropic Material ◽  
Circular Cylinders ◽  
Isotropic Materials ◽  
Fourier Heat Conduction

A generalization of the Fourier heat-conduction law appropriate for heat flow in a deformed incompressible initially isotropic material is considered and applied to the determination of the temperature distribution in a uniformly extended plate and in thick-walled circular cylinders subjected to torsion and shear.

Stresses in Pressurized Circular Shells With Discontinuities, With or Without Stiffeners

1972 ◽  
Vol 16 (02) ◽  
pp. 140-147
Author(s):  
A. J. Durelli ◽  
V. J. Parks
Keyword(s):  
Experimental Determination ◽  
Mechanical Strain ◽  
Three Dimensional ◽  
Pressure Vessels ◽  
Circular Cylinders ◽  
Constant Thickness ◽  
Strain Gages ◽  
Circular Holes ◽  
Reinforcing Ribs

This paper is a summary of a series of five research programs dealing with the experimental determination of stresses, strains, and displacements in circular cylinders subjected to pressure. The vessels have either constant thickness or transverse reinforcing ribs. Circular holes, with either plain or reinforced edges, are located in different positions of the vessels. The methods used for the analysis are: brittle coatings, three-dimensional photoelasticity ("freezing" technique), and electrical and mechanical strain gages. The most important results are summarized in a table. These results will be of interest to designers of underwater ships and of pressure vessels in general.

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