质心惯性椭球面
central ellipsoid of inertia
惯性椭球
ellipsoid of inertia
generalized inertia ellipsoid
等效截面惯性矩
Equivalent second axial moment of area
地球惯性坐标系
earth-center inertial coordinate system
断面惯性矩
section inertia
geometrical moment of inertia
second moment of area
sectional momoent of inertia
浮球惯性平台
floated-ball inertial platform
弓梁截面惯性矩
moment of inertia of arch section
截面惯性矩
cross-section inertia
cross sectional moment of inertia
second moment of area