For us getting a good understand of this method, the basic math method of finite element is introduced such as variation principle, Ritz method and weighted residual method.

• 因此文章介绍了有限元数学基础即变分原理、里兹法和加权余量法，并结合本论文研究的重点液力变矩器介绍了有限元解题的步骤。