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。