摘要
对逃逸舱模型耐压球壳结构的径向初挠度和板厚分布进行测量,推导球面形状拟合算法并编制了Matlab拟合程序,基于激光跟踪仪测得的球壳外表面各点笛卡尔三维直角坐标数据拟合了球面半径、球心位置,计算各点的径向初挠度,并结合各点的测厚数据确定球壳的初始几何形状。利用Matlab绘制球壳初挠度和厚度的彩色分布云图,采用半球模压成型的球壳一般半球顶部区域壳板减薄较多,而赤道附近增厚明显,测点的径向初挠度数据大致服从正态分布规律。
The initial radial deformation and thickness distribution of escape capsule structural models' spherical shell have been measured and analyzed in the paper. We built the fitting method for spherical shell's shape and wrote Matlab codes to calculate the fittest sphere's radius and center location based on the cartesian coordinates of spherical shell' s external surface measured by laser tracker,thus obtaining the initial radial deformation at each point. Therefore,precise shape of spherical shell could be determined by combination use of measured shape imperfection and thickness distribution,which were visualized in colored maps by Mtalab.Hemispheres formed in moulds are usually thinner in poles and thicker in equators,while their initial radial deformation follow the pattern of normal distribution approximately.
出处
《舰船科学技术》
北大核心
2015年第S1期96-102,共7页
Ship Science and Technology
关键词
逃逸舱
球壳
激光跟踪仪
初挠度
拟合
厚度
云图
escape capsule
spherical shell
laser tracker
initial radial deformation
fitting
thickness
nephogram
