DIIDynamic

DIIDynamic	nsteps(in) #
	[renumber(in) #]
	deltaT(rn) #
	alpha(rn) #
	beta(rn) #
	Psi(rn) #

Represents direct implicit integration of linear dynamic problems. Damping is modeled as Rayleigh damping $($$c$$= \rm {alpha}*$$M$$+ \rm {beta} *$   $K$$)$. Parameter Psi determines integration method used, forPsi = 1 the Newmark and for Psi $\ge$ 1.37 the Wilson method will be used. Parameter deltaT is required time integration step length. Nonzero value of optional parameter renumber turns on the equation renumbering to optimize the profile of characteristic matrix (uses Sloan algorithm). By default, profile optimization is not performed. It will not work in parallel mode.