固定支承是指位置固定不变的定位元件或结构。这类定位元件一经安装在夹具体上以后，其高度方向的尺寸便是固定不变和不可调节的。用于平面定位的平头支承钉、球头支承 钉或锯齿头支承钉、支承板等定位元件都属 于固定支承。
计算中考虑了两种边界条件：一种是固定支承的；一种是弹性支承的。
By this Method, the natural frequency of revolution with geomeric axisymmetric imperfections was computed for two kinds of boundary conditions: one is fixed, the other is elastically supported.
编制了发动机表面或其他机器表面辐射效率计算机程序，并提出了固定支承边界和带加强筋平板的处理方法。
The computer program for calculating radiated efficiency of engine or of other machine surface has been compiled and treatment of Clamped boundary conditions and ribbed plates are proposed.
该装置具有完备的、高精度的水平和轴向基准，采用等高的固定支承，保证了杆杆试验系统具有良好的共轴度；
High-precision horizontal reference and axial reference are established and fixed equal-height supports are used to ensure the reliable coaxality of bar-bar system.
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