摘要
提出了储罐系统可靠性设计参数 (载荷、结构尺寸、材料性能 )的计算方法。并采用 8节点等参元有限元法计算了储罐结构应力 ,考虑了影响结构失效的两个不确定性因素 :随机性和模糊性。根据断裂力学理论和模糊可靠性理论 ,建立了无泄漏储罐失效模糊极限状态方程。提出了计算结构系统模糊断裂可靠度的权函数综合法 ,该方法具有高的效率。
A calculation method for reliability of design parameters of tank,such as load,dimension,material property,was proposed.The structural stresses of tank were calculated with the eight_dot limited element.Two undetermined factors for influencing structural failure,e.g.randomness and fuzzyness,were taken into account.A fuzzy critical state equation for describing failure of leak_free tank was established according to the theories of fracture mechanics and fuzzy reliability.A fuzzy weight function algorithm for calculating structural reliability of a tank was presented.A method for calculating the reliability of cracking on tank was also given.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2002年第5期96-100,共5页
Acta Petrolei Sinica
基金
黑龙江省自然科学基金资助项目 (E0 2 0 1)
