The nonlinear parameters of non-wind-induced aeroelastic force were identified by an energy equivalent principle (EEP) from the free-decay response in still air.
This model is a deformation-based continuum damage model with stiffness degradation and is based on a deformation equivalent principle and generalized force deformation relationships for concrete and its steel reinforcement.
Then the two-phase Poiseuille flow problem is solved by obtaining an equivalent variational principle and applying the Rayleigh Ritz method.
In addition, the reinforcing ratio is considered based on the equivalent principle of composite mechanics.
On the basis of optimal equivalent principle, accurate harmonic model is set up with the magnetic field formulated.
Second, the effective elastic properties of the RVE in 2.5D C/SiC composites are obtained using finite element method (FEM) simulation based on energy equivalent principle.
After the wave scatter diagram is partitioned into several blocks, the newly developed method, involves determination of the equivalent wave height, wave period and occurrence probability of the representative sea states based on modified energy equivalent principle.
To verify the present method, a deepwater semisubmersible system operated in 1500 m and 1000 m water depth is truncated to 200 m water depth based on the static equivalent principle (the truncation factors are 7.5 and 5 respectively), and the dynamically similar design is implemented to the model tests which are carried out at China Ship Scientific Research Center wave basin.
The model parameters for sample filling ratios are determined by an efficient finite element method according to equivalent principles, while the parameters for other filling ratios are obtained by piecewise linear interpolation.
For convenient expression of magnetic field, three types of approximated dihedral cone shaped magnet poles are put forward based on different equivalent principles.
