There is a big error in the bending moment distribution along the beam between the theoretical value and BEAM188 element calculation results. In order to improve accuracy,a quadratic BE AMI 88 element is a better choice. The result shows that this method can improve the calculation accuracy in the premise of ensuring computational efficiency.%BEAM188单元沿梁长度方向的弯矩为阶梯状分布,与理论分析结果存在较大误差,对计算精度有很大影响.为提高计算精度,提出了采用二次型的BEAM188单元的方案,并通过计算检验了二次型梁单元的收敛速度和计算精度.结果表明,该方案能够在保证计算效率的前提下显著地提高计算精度.
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