The equipment includes the upper compression bar (3), the lower compression bar (4), the heater coil (6) and a working chamber (12), etc.
设备包括上压杆(3)、下压杆(4)、加热线圈(6)、工作腔体(12)等。
A new approximate formula for the large deflection problem of compression bar with two ends are simply supported is obtained, by the use of Ritz-Galerkin method.
通过非线性振动中常用的里兹-伽辽金法，推出了两端铰支压杆大挠度问题的一个新近似公式，计算结果表明具有较高的精度。
Based on the 3_d deteriorated girder element, the formulae of FEM for elastic stability of variable cross_section compression bar concerning geometrical nonlinearity have been derived.
在三维退化梁单元的基础上，引入几何非线性，推导出计算任意变截面压杆稳定问题的有限元列式。
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