The existing results, however, involve no local stability of shells.The fundamental objective in this dissertation lies in applying FPPM to solve the nonlinear local stability of dished flat shells.

• 但是，已有的研究成果没有讨论壳体局部稳定问题，本文的主要目的是采用自由参数摄动法研究碟形扁壳的非线性局部稳定问题。