精密成形工程
精密成形工程
정밀성형공정
METAL FORMING TECHNOLOGY
2014年
5期
80-84
,共5页
初始缺陷%承载性能%耐压结构%厚壁筒
初始缺陷%承載性能%耐壓結構%厚壁筒
초시결함%승재성능%내압결구%후벽통
initial imperfection%bearing capacity%pressure-resistant structure%thick-wall cylinder
目的：基于有限元方法，通过分析研究深海耐压圆筒结构在不同初始缺陷下的屈曲压力，研究初始缺陷对厚壁圆筒承载极限的影响。方法建立了三维厚壁筒模型，分别研究了圆筒在初始几何缺陷、初始应力缺陷和两种缺陷复合的状态下，结构的承载性能，并将得到的结果与理想状态下的结构作对比。结论结果表明，无论是初始几何缺陷，还是初始应力缺陷，都会降低结构的承载极限。
目的：基于有限元方法，通過分析研究深海耐壓圓筒結構在不同初始缺陷下的屈麯壓力，研究初始缺陷對厚壁圓筒承載極限的影響。方法建立瞭三維厚壁筒模型，分彆研究瞭圓筒在初始幾何缺陷、初始應力缺陷和兩種缺陷複閤的狀態下，結構的承載性能，併將得到的結果與理想狀態下的結構作對比。結論結果錶明，無論是初始幾何缺陷，還是初始應力缺陷，都會降低結構的承載極限。
목적：기우유한원방법，통과분석연구심해내압원통결구재불동초시결함하적굴곡압력，연구초시결함대후벽원통승재겁한적영향。방법건립료삼유후벽통모형，분별연구료원통재초시궤하결함、초시응력결함화량충결함복합적상태하，결구적승재성능，병장득도적결과여이상상태하적결구작대비。결론결과표명，무론시초시궤하결함，환시초시응력결함，도회강저결구적승재겁한。
Objective Based on the finite element method, the buckling pressure of deep-sea pressure-resistant cylin-der structure was analyzed under different initial imperfections and the influence of initial imperfections on the bearing limit of the thick-wall cylinder was studied in this article. Methods The three-dimensional model of thick-wall cylinder was es-tablished, the bearing capacity of the cylinder structure was respectively studied under the initial imperfections, including initial geometric imperfection and initial imperfection of residual stress and the superposition of the two imperfections struc-ture. The results were compared with the analysis results of the ideal situation. Conclusion It turned out that the initial de-fects reduced the structure bearing limit, regardless of initial geometric imperfection or initial stress imperfection.
