ls-dyna模拟时出现Warning 302 (KEY+302)，请问怎么解决？

求助  时勇党《基于ansys8.1进行显示动力学分析》一书中，炸药在土体中爆破的例子，根据书中的方法得到的K文件   计算时出现的是这样一串提示

*** Warning 10302 (KEY+302)

     CHECKING MATERIAL INPUT Part ID= 1

     The default hourglass properties of the following

     ALE part are being modified to avoid unnecessary

     application of hourglass forces.

     Resetting coefficient qm=1.0e-6.

     PART ID 1 with

     MATERIAL ID 1 and

     EOS ID 0

     This is PART 1 in the order of input.

 

 *** Warning 10302 (KEY+302)

     CHECKING MATERIAL INPUT Part ID= 2

     The default hourglass properties of the following

     ALE part are being modified to avoid unnecessary

     application of hourglass forces.

     Resetting coefficient qm=1.0e-6.

     PART ID 2 with

     MATERIAL ID 2 and

     EOS ID 1

     This is PART 2 in the order of input.

 

 *** Warning 10302 (KEY+302)

     CHECKING MATERIAL INPUT Part ID= 3

     The default hourglass properties of the following

     ALE part are being modified to avoid unnecessary

     application of hourglass forces.

     Resetting coefficient qm=1.0e-6.

     PART ID 3 with

     MATERIAL ID 3 and

     EOS ID 3

     This is PART 3 in the order of input.

后面为K文件部分内容：

$                             SECTION DEFINITIONS                              $

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$

*SECTION_SOLID_ALE

         1        11

$

$

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$                             MATERIAL DEFINITIONS                             $

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$

*MAT_SOIL_AND_FOAM

         1      1.80 1.601E-04 1.328E+02 3.300E-03 1.310E-07    0.1232       0.0

       0.0       0.0

       0.0     0.050     0.090      0.11      0.15      0.19      0.21      0.22

      0.25      0.30

       0.0 3.420E-02 4.530E-02 6.760E-02 1.270E-01 2.080E-01 2.710E-01 3.920E-01

 5.660E-01 1.230E+00

*MAT_HIGH_EXPLOSIVE_BURN

         2 1.6400000 0.6930000 0.2700000 0.0000000 0.0000000 0.0000000 0.0000000

*EOS_JWL

         1 3.7400000 3.2300e-2 4.1500001 0.9500000 0.3000000 0.0700000 1.0000000

$

*INITIAL_DETONATION

         2       2.5       2.5        80      0.00

*MAT_NULL

         3 1.290E-03 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000 0.0000000

*EOS_LINEAR_POLYNOMIAL

         3 -1.00E-06 0.0000000 0.0000000 0.0000000 0.4000000 0.4000000 0.0000000

 2.500E-06 1.0000000  

$

$

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$                              PARTS DEFINITIONS                               $

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

$

$

*PART

Part          1 for Mat         1 and Elem Type         1

         1         1         1         0         0         0         0

$

*PART

Part          2 for Mat         2 and Elem Type         1

         2         1         2         1         0         0         0

$

*PART

Part          3 for Mat         3 and Elem Type         1

         3         1         3         3         0         0         0

$

*ALE_MULTI-MATERIAL_GROUP

        1          1

        2          1

        3          1