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Major component characteristics of the web opening degree Kong Houqiang

Author: ZhangZuoHua
Tutor: ZhangShiLian
School: Shanghai Jiaotong University
Course: Design and manufacture of ships and marine structures
Keywords: Web openings Strength characteristics Comparative strength design method Preferred FEM
CLC: U661.43
Type: Master's thesis
Year: 2012
Downloads: 39
Quote: 0
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Abstract


The hull structure, since the pipes, cables, and other components required arrangement , often in the hole on the main web member , which tends to be the strength properties of the main components adversely affected. At present, the main component for web openings Kong Houjiang degree less systematic study of characteristics , hole design is generally based on the requirements of classification rules . For web openings parameters exceed regulatory requirements and loads the main components of uncertainty , usually by direct calculation can not be performed strength characteristics analysis and assessment. Given the above, this paper uncertain load exceeds regulatory requirements webs openings , we propose a specification-based comparative strength design method . And to meet and exceed regulatory requirements webs opening a major component parameters using the finite element method calculation and strength characteristics were analyzed using the comparative strength design method for web openings strengthened beyond the regulatory requirements of a preferred manner suggested . The main research work and the contents are: ( 1 ) analysis of the main components of the hull mechanical characteristics , discussion webs characteristics of open Kong Duiqiang degree , compared to the national classification rules for the main components of the hull openings webs provisions ; ( 2 ) with fasting truss theory, the opening region of the stress distribution and the calculation result of local deformation , that the openings in the end position is due to the larger shear to form the secondary moment adversely affect the strength characteristics of the reasons ; ( 3 ) strength design method based on the comparison , calculation and analysis on the primary member webs opened parameters exceed regulatory requirements do not strengthen the hole after hole and strengthening the strength characteristics , the results show that complex peripheral edges of flat steel reinforcing plate means in a certain range is valid ; ( 4 ) after the opening peripheral edge web multiplexed flat plate of a preferred way to enhance , maintain the width of flat peripheral edge of the effective width ( 6 times web thickness) of the same thickness and the web , undone the same thickness of the plate with the web , and according to the technical requirements and strengthen the need to properly thickened . This research will help to deepen after the opening of the main components of the strength characteristics of web knowledge , for the main components and web openings strengthened after opening the way to provide a reference design .

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CLC: > Transportation > Waterway transport > Marine Engineering > Ship Principle > Ship structural mechanics > Ship structural strength
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