请大家指导下solid236单元关键项2的设置

spencerdl

请大家指导下solid236单元关键项2的设置：
KEYOPT(2)
Coupling method between magnetic and electric degrees of freedom (KEYOPT(1) = 1 or 2); also defines the meaning of the VOLT and EMF degrees of freedom for KEYOPT(1) = 1 or 2:
0 -- 
Strong (matrix) coupling. Produces an unsymmetric matrix. In a linear analysis, a coupled response is achieved after one iteration. Applicable to all analysis types.
1 -- 
Weak (load vector). Produces a symmetric matrix and requires at least two iterations to achieve a coupled response. Applicable to static and transient analyses only. (see "SOLID236 Assumptions and Restrictions")
2 -- 
Strong (matrix) coupling with time-integrated electric potential (VOLT) for KEYOPT(1) = 1 (electromagnetic analysis). Produces a symmetric matrix.
Strong (matrix) coupling with time-integrated voltage drop (VOLT) and time-integrated electromotive force (EMF) for KEYOPT(1) = 2 (stranded coil analysis). Produces a symmetric matrix if the coil symmetry factor is 1; produces a nonsymmetric matrix if the coil symmetry factor is greater than 1.
In a linear analysis, a coupled response is achieved after one iteration. Applicable to harmonic and transient analyses only.