Impact and slamming strength of VLCC bow flare structure

  • ZHANG Rong-xin
Expand
  • (China Classification Society,Dalian Branch,Dalian 116013,China)

Received date: 2019-04-19

  Revised date: 2019-07-11

  Online published: 2019-07-11

Abstract

Current CSR codes only consider the influence of impact pressure on the bow flare structure of VLCC bow,but neglect the impact of slamming pressure.As a result, VLCC with large bow flare structure was often damaged by large wave loads.  In this paper,two kinds of impact pressures were proposed based on the CSR code load system, the reverse engineering calculation was carried out by using the finite element method for damage structures  by combining with real ship case data,and the least square method was used to analyze the experimental data to search for the optimal solution.Finally,according to the best scheme
,the modification scheme of  damaged structure was proposed and verified.The results can provide help for the structural design of VLCC.

Cite this article

ZHANG Rong-xin . Impact and slamming strength of VLCC bow flare structure[J]. Journal of Dalian Maritime University, 2019 , 45(4) : 20 -25 . DOI: 10.16411/j.cnki.issn1006-7736.2019.04.004

References

[1] IACS .Common Structural Rules for Double Hull Oil Tankers,July 2012.
[2] ISSC. Committee V.7. Impulsive pressure loading and response assessment[C]. 17th International Ship and Offshore Structures Congress, 2012: 31-33.
[3]于鹏垚,任慧龙等.船首外飘砰击设计载荷直接计算[J],船舶力学,2016,5(20):566-573.
[4]于鹏垚,任慧龙等.船首外飘砰击强度直接计算[J],中国造船,2015,3:61-68.
[5]王辉, 朱云祥, 顾学康, 沈进威. Ro-Ro 船首门砰击载荷设计值的确定[J]. 船舶力学, 2003, 7(1): 46-54.
[6] STAVOVY A B, CHUANG S L. Analytical determination of slamming Pressures for high-speed vehicles in waves [J].J.S.R, 1976, 2(4):190-198.
[7] WANG SHAN. Assessment of slam induced loads on two dimensional wedges and ship sections [D]. Portugal: University of Lisbon, 2011: 27-40.
[8]任慧龙,霍帅帅等.砰击载荷作用下船艏结构瞬态响应研究[J],中国舰船研究,2013,12(8):14-19.
Outlines

/