局部初始几何缺陷对凸型锥-环-柱结合壳应力影响的分析
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摘要
分析锥-环-柱结合壳加工过程,确定初始几何缺陷要素。运用计算机仿真技术,分析不同工况下的初始几何缺陷对锥-环-柱结合壳典型部位应力的影响。研究结果表明:由初始几何缺陷引起的附加弯矩与初始几何缺陷幅值呈线性关系;环壳近柱壳侧跨端内表面纵向应力值较大,对初始几何缺陷较为敏感,随初始几何缺陷幅值的增大最先超过规范许用应力;肋骨初挠度、圆柱壳段、圆锥壳段壳板凹凸度同时存在时,对应力的不利影响较大。
Original geometrical imperfection of ring-stiffened convex shell integrated with cone-toriod and cylinder in the processing and its effect on stress of the structure is analyzed by the use of numerical simulation. The research results show that bending moment has linear relation with imperfection's amplitude, while longitudinal stress is big at the region on inner toric surface and near to the cylinder, and it will reach the criterion's permissive stress firstly along with the increase of original geometrical imperfection. There is the largest disadvantageous effect to the stress, if rib's deflection, concavo-convex deformation of column and taper exist simultaneously.
Original geometrical imperfection of ring-stiffened convex shell integrated with cone-toriod and cylinder in the processing and its effect on stress of the structure is analyzed by the use of numerical simulation. The research results show that bending moment has linear relation with imperfection's amplitude, while longitudinal stress is big at the region on inner toric surface and near to the cylinder, and it will reach the criterion's permissive stress firstly along with the increase of original geometrical imperfection. There is the largest disadvantageous effect to the stress, if rib's deflection, concavo-convex deformation of column and taper exist simultaneously.
引文
[1]黄加强,郭日修.加肋锥-环-柱组合壳强度及稳定性模型实验研究[J].中国造船,1998,143(4):57-65.
[2]陈志坚,郭日修.加肋轴对称旋转壳非线性稳定性分析[J].中国造船,2004,45(1):54-60.
[3]白雪飞,陈昕,丁锦超,吴梵,吕岩松,郭日修.凹型加肋锥-环-柱组合壳强度的模型试验研究[J].船舶力学.2006,10(2):65-72.
[4]白雪飞,任文敏,郭日修.组合加肋旋转壳应力和稳定性分析的Riccati传递矩阵法[J].工程力学.2008,25(3):18-25.
[5]郭日修,吕岩松,黄加强,吴梵,白雪飞,陈昕.加肋锥-环-柱结合壳试验研究[J].船舶力学,2008,12(2):252-257.
[6]郭日修,吕岩松.凹型加肋锥-环-柱组合壳局部加强方式研究[J].哈尔滨工程大学学报,2010,31(2):170-176.
[7]吕岩松,郭日修.含凸、凹型锥-环-柱结合壳的连接结构试验研究[J].哈尔滨工程大学学报,2011,32(9):1140-1143.
[8]GJB/Z 21A-2001潜艇结构设计计算方法[S].北京:国防工业技术委员会,2001.
[2]陈志坚,郭日修.加肋轴对称旋转壳非线性稳定性分析[J].中国造船,2004,45(1):54-60.
[3]白雪飞,陈昕,丁锦超,吴梵,吕岩松,郭日修.凹型加肋锥-环-柱组合壳强度的模型试验研究[J].船舶力学.2006,10(2):65-72.
[4]白雪飞,任文敏,郭日修.组合加肋旋转壳应力和稳定性分析的Riccati传递矩阵法[J].工程力学.2008,25(3):18-25.
[5]郭日修,吕岩松,黄加强,吴梵,白雪飞,陈昕.加肋锥-环-柱结合壳试验研究[J].船舶力学,2008,12(2):252-257.
[6]郭日修,吕岩松.凹型加肋锥-环-柱组合壳局部加强方式研究[J].哈尔滨工程大学学报,2010,31(2):170-176.
[7]吕岩松,郭日修.含凸、凹型锥-环-柱结合壳的连接结构试验研究[J].哈尔滨工程大学学报,2011,32(9):1140-1143.
[8]GJB/Z 21A-2001潜艇结构设计计算方法[S].北京:国防工业技术委员会,2001.