三杆桁架是单靠静力方程求解不了的，称为拉压杆截面上有无穷个应力，单凭 静力平衡方程静不定（ Static indeterminate ） ——静力不能确定超静定问题（ Hyperstatic ） ——超出了静力范围其实我们在拉压杆应力遇到过这类问题补充 变形协调方程不能...
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The reactor pressure vessel composed of spherical top and lower heads, upper and lower flanges, bolts, cylinder and two O-rings, as a static indeterminate system has been studied.
本文将反应堆压力壳的球顶盖、上下法兰、螺栓、筒体及双道O形环作为一个超静定系统进行了应力和变形分析。
With this method the structural analysis of static and kinematic indeterminate foldable systems is conducted and the kinematic bifurcation points of pin-connected foldable structures along motion pat.
采用该方法对静不定动不定折叠体系进行了求解，确定了铰接式折叠结构的运动分歧点并求解了其高阶相容方程。
The kinematic and static determinations of Assur's links group have been analysed. It has been also demonstrated that the member of statical indeterminate is equal to its common constraint.
对阿苏尔组的两个性质进行了分析，证明了其静不定次数等于其公共约束数目。
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