回弹问题，大家给点意见

我的一个回弹分析，出现下面的情况，请大家给给意见
BEGIN implicit time step 1
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time = 1.00000E-03
current step size = 1.00000E-03*******************采用初始时间步长0.001，计算过程第一步
这个值不段减小，可还是不收敛，什么原因？？
expanding memory to 24670399
SPRINGBACK: artificial stabilization is now 25.000 percent removed**********为什么这个25%不能改动？？？？改动SCALE不起作用？好像SCALE不能改动（下图）
expanding memory to 39137915
expanding memory to 48094033
expanding memory to 195247684
minimum memory for in-core stiffness factorization = 100.2 Mw
Iteration: 1 *|du|/|u| = 1.0000000E+00 *Ei/E0 = 1.0000000E+00
DIVERGENCE (increasing residual norm) detected:
|{Fe}-{Fi}| ( 1.2909154E+10) exceeds |{Fe}| ( 2.1019479E+09)
automatically REFORMING stiffness matrix...
Iteration: 2 *|du|/|u| = 1.0767975E+00 *Ei/E0 = 4.4488457E+01
DIVERGENCE (increasing residual norm) detected:
|{Fe}-{Fi}| ( 3.0177887E+13) exceeds |{Fe}| ( 1.2909154E+10)
automatically REFORMING stiffness matrix...
Iteration: 3 *|du|/|u| = 1.0110451E+00 *Ei/E0 = 2.3445809E+05
DIVERGENCE (increasing residual norm) detected:
|{Fe}-{Fi}| ( 1.1016115E+22) exceeds |{Fe}| ( 3.0177887E+13)
automatically REFORMING stiffness matrix...
*** Warning: 51 negative eigenvalues detected*******************怎么会出现这个呢？
STOP iterations due to energy explosion!*****************************这个是什么意思？
Initial energy = 3.1610E+05
Current energy = -1.2463E+14
node with maximum displacement = 238820
node with maximum rotation = 238836
node with maximum force = 415805
node with maximum moment = 238795
node with maximum trans. product = 415805
node with maximum rotat. product = 238795
mag. maximum translational product= 2.5688E+16
mag. maximum rotational product = 1.8140E+14
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KEY POINT reached at time = 0.00000E+00
new DTMAX = 1.00000E-03, next key point = 4.00000E-03
automatic time step size DECREASE, RETRY step:
dt(old) = 1.00000E-03 dt(new) = 4.64159E-04
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