摘要
本文论述了拉氏乘子法的几点灵活性:(1)拉氏乘子表达式的不唯一性.(2)在泛函的变分式中引入拉氏乘子.(3)应用拉氏乘子法推导有先决条件的广义变分原理.(4)应用拉氏乘子法时出现的特殊情况.
Some flexibility of the method of undetermined Largrange multiplier is studied in this paper. (1) The non-uniqueness of the expression of undetermined Lagrange multiplier. (2) The introduction of undetermined Lagrange multiplier in variational expression of original functional. (3) The derivation of generalized variational principles with preconditions by the use of the Lagrange multiplier method. (4) An exceptional cose arising, frem using the method of undetermined Lagrange multiplier.
出处
《力学学报》
EI
CSCD
北大核心
1989年第1期111-116,共6页
Chinese Journal of Theoretical and Applied Mechanics
关键词
拉氏乘子法
变分原理
广义变分原理
Lagrange multiplier method, variational principle generalized variational principle
