摘要
耐压壳的承载能力是设计深海载人潜水器的重要技术之一.通过引入强度稳定综合理论的切线模量因子方法,在材料本构关系的基础上,拟合出反映结构平衡关系的切线模量因子曲线,并用一个解析化的四参数函数表示.将该解析表达式运用在大深度钛合金承压球壳极限承载力的计算上,并将得出的计算值与泰勒水池公式法、有限元法计算值进行比较.结果表明,切线模量因子方法简便而有效,能达到工程的使用要求,可以在球壳的初步设计和实验数据的整理分析时使用.
A critical step when designing manned deep-sea submersibles is ultimate strength analysis of the pressure shell. A method called the tangent modulus factor was applied. It was derived from the combined theory of strength and stability. Based on the relationship between stress and strain in a material, the tangent modulus factor curve can he simulated, thus reflecting the structures balance relationship. The curve can be expressed also by an analyt- ical function with four parameters. The function was used to calculate the ultimate strength of a titanium alloy spher- ical pressure shell for a deep-sea submersible. These results were compared with those from the Taylor Basin formu- la and the finite element method. The method proposed in this paper is simpler and the results showed that it produces figures acceptable for engineering practice. This showed that the tangent modulus factor method is valid for preliminary design and analysis of proposed spherical shell pressure hulls.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2010年第2期177-181,共5页
Journal of Harbin Engineering University
关键词
切线模量因子
钛合金
深潜器
耐压球壳
极限强度
tangent modulus factor
titanium alloy
deep-sea submersible
pressure spherical shell
ultimate strength
