The differential equation for the vibration of the riser system is derived by means of functional calculusofvariation.
采用泛函变分法导出了隔水管的振动微分方程。
2
Calculation of resonant frequencies of sloshing in a container have been achieved by FEM with calculusofvariation, which is able to solve sloshing in variety complex containers.
The calculating formulas of top and bottom pool-surface deformation in TIG full-penetration weld pool is developed based on principles of fluid mechanics and variationcalculus.