摘要
采用Kollbrunner-Hajd in改进的薄壁梁理论,考虑了破口引起的舰体结构不对称性造成的弯扭耦合及不同剖面的协调问题,用迁移矩阵法计算武器命中后破损舰船的内力,并采用符拉索夫法考虑了武器命中水线以下后破损引起的外载荷变化.通过求解不同武器命中不同位置后的破损船体内力,找出了正应力和剪应力随不同破损位置的变化规律及其影响因素,研究指出计算破损舰船结构应力时必须同时考虑破损引起的结构不对称性、承载力下降和由于进水引起的浮态和载荷变化等各方面的不利影响,从而为舰船破损后的剩余强度研究提供依据.
Taking a warship as model, considering both bending and torsion caused by damage, the stresses of damaged ship hull are calculated using transfer matrix method based on Kollbrunner- Hajdin modified thin -wall beam theory. The floating parameters and wave load of the warship when damaged under waterline are studied using Vlasov＇ s method. The results show that the damage of hull structure causes the variety of the floating parameters and wave load, the lose of section modulus and the unsymmetry of section. Both of them should be considered when the stresses of hull structure are calculated, and they all have bad effect on the viality of damaged warship. The regulation of normal and shearing stresses varying with damage position and dimension are given, and the factors effecting stresses are found. The study supplies accordance for residual strength analysis and is important for the vitality evaluation of warship.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2007年第1期20-23,50,共5页
Journal of Harbin Institute of Technology
关键词
破损舰船
弯扭耦合
外载荷
应力变化
生命力
damaged warship
bending-torsion combination
wave load
stress variety
vitality
