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    • 4. 发明申请
    • Weight optimized pressurizable aircraft fuselage structures having near elliptical cross sections
    • 重量优化的加压飞机机身结构具有近椭圆截面
    • US20070108347A1
    • 2007-05-17
    • US11273966
    • 2005-11-15
    • Mithra SankrithiKevin Retz
    • Mithra SankrithiKevin Retz
    • B64C1/00
    • B64C1/061B64C1/08B64C2001/0045B64C2001/0072B64C2001/0081Y02T50/12Y02T50/43
    • An aircraft fuselage includes a tubular shell having a centerline axis, opposite ends, and a cross-section having a radius R(φ), where φ is the angular coordinate of a cylindrical coordinate system, a curvature Curv(φ), where Curv(φ) is the inverse of a local radius of curvature of a surface of the shell, and a circumferential shape that varies radially by no more than ±7% from that of an elliptical cross-section at substantially every station along the centerline axis between the nose and tail ends thereof. The weight of the shell is minimized by “tailoring,” i.e., optimizing, at least one structural attribute, expressed as a function of φ, associated with every element of the shell, such that the weight of the shell required to react a design load incident thereon is less than that required to react the same design load, but wherein the same structural attribute has not been so tailored.
    • 飞机机身包括具有中心线轴线,相对端部和具有半径R(phi)的横截面的管状壳体,其中,phi是圆柱坐标系的角坐标,曲率Curv(phi),其中Curv( phi)是壳体的表面的局部曲率半径的倒数,并且圆周形状沿着沿着中心线轴线的基本上每个站处的椭圆形截面的径向变化不超过±7% 鼻子和尾端。 通过与外壳的每个元件相关联的“定制”,即优化至少一个表示为与phi的函数的结构属性的至少一个结构属性,使得壳体的重量最小化,使得反应设计负载所需的壳的重量 其上的事件小于反应相同设计负载所需的事件,但是其中相同的结构属性尚未如此定制。
    • 10. 发明授权
    • Weight optimized pressurizable aircraft fuselage structures having near elliptical cross sections
    • 重量优化的加压飞机机身结构具有近椭圆截面
    • US07621482B2
    • 2009-11-24
    • US11273966
    • 2005-11-15
    • Mithra M. K. V. SankrithiKevin Retz
    • Mithra M. K. V. SankrithiKevin Retz
    • B64C1/06
    • B64C1/061B64C1/08B64C2001/0045B64C2001/0072B64C2001/0081Y02T50/12Y02T50/43
    • An aircraft fuselage includes a tubular shell having a centerline axis, opposite ends, and a cross-section having a radius R(φ), where φ is the angular coordinate of a cylindrical coordinate system, a curvature Curv(φ), where Curv(φ) is the inverse of a local radius of curvature of a surface of the shell, and a circumferential shape that varies radially by no more than ±7% from that of an elliptical cross-section at substantially every station along the centerline axis between the nose and tail ends thereof. The weight of the shell is minimized by “tailoring,” i.e., optimizing, at least one structural attribute, expressed as a function of φ, associated with every element of the shell, such that the weight of the shell required to react a design load incident thereon is less than that required to react the same design load, but wherein the same structural attribute has not been so tailored.
    • 飞机机身包括具有中心线轴线,相对端部和具有半径R(phi)的横截面的管状壳体,其中,phi是圆柱坐标系的角坐标,曲率Curv(phi),其中Curv( phi)是壳体的表面的局部曲率半径的倒数,并且圆周形状沿着沿着中心线轴线的基本上每个站处的椭圆形截面的径向变化不超过±7% 鼻子和尾端。 通过与外壳的每个元件相关联的“定制”,即优化至少一个表示为与phi的函数的结构属性的至少一个结构属性,使得壳体的重量最小化,使得反应设计负载所需的壳的重量 其上的事件小于反应相同设计负载所需的事件,但是其中相同的结构属性尚未如此定制。