Geotechnical Engineering

Should confirm continuity of the interface before join basic units together.

Apply  GENERATE point  checking the bound of  interface whether  acceptable  is very useful.  Sometimes we can also apply PLOT sketch and PLOT boundary command checking units manually , GENERATE merge is often applied after find mismatch express local rate abnormal .

Example 1: join two different units.

gen zone brick size 4 4 4 p0 0,0,0 p1 4,0,0 p2 0,4,0 p3 0,0,2
gen zone brick size 8,8,4 p0 0,0,2 p1 4,0,2 p2 0,4,2 p3 0,0,4
attach face range z 1.9 2.1
model elas
prop bulk 8e9 shear 5e9
fix z range z  -.1 .1
fix z range x  -.1 .1
fix x range x  3.9 4.1
fix y range y  -.1 .1
fix y range y 3.9 4.1
apply szz -1e6 range z 3.9 4.1 x 0,2 y 0,2
hist unbal 
solve
save att.sav

Example 1: simple unit.

gen zone brick size 8 8 8 p0 0,0,0 p1 4,0,0 p2 0,4,0 p3 0,0,4
model elas
prop bulk 8e9 shear 5e9
fix z range z  -.1 .1
fix z range x  -.1 .1
fix x range x  3.9 4.1
fix y range y  -.1 .1
fix y range y 3.9 4.1
apply szz -1e6 range z 3.9 4.1 x 0,2 y 0,2
hist unbal 
solve
save noatt.sav

Standard shape GENERATE zone command called

Keywords about GENERAE zone command

Additional option: GENERATE zone copy ; GENERATE zone reflect ; GENERATE point .

Example:

gen zone radcyl  size 5 10 6 12 rat 1 1 1 1.2 p0 0,0,0 p1 100,0,0 p2 0,200,0 p3 0,0,100
gen zone radtun size 5 10 5 12 rat 1 1 1 1.2 p0 0,0,0 p1 0,0,-100 p2 0,200,0 p3 100,0,0
gen zone reflect dip 90 dd 270 origin 0,0,0

Judge the model of FLA3D is the problem's  actuality but not programme itself. It can provide forecasting reliability accurate base on the date sufficiency.

STEP.1 Build the project of the numerical analysis

Sometimes we can build a  probable model when face  contradictions of the system is moe rational , and can also ignore the micro-influent.

STEP.2 Build concept model describe the actuality

First of all make it clear that : Stability or instability ? linear or nonlinear ? Big-displacement or micro displacement ? continua or discontinuous ?  Influent by ground water or not ?  Infinite boundary or finite ? Physical model symmetry or not ? ......

STEP.3 Operation numerial analysis on simplified and supposition form

STEP.4 Collection detail date of the problem's solution

STEP.5 Prepare  calculation model different

STEP.6 Operation the model have prepared

STEP.7 Analysis the result