File

Save the data created using the DGS in various forms, or import existing data.

[Unit System]

Specify the force and length units of the dynamic load data. The unit system must be specified before creating the dynamic load data.

Blasting Dynamic Load

Select a suggested blasting load equation type, suggested by various institutions.

The institution, suggested equation and corresponding units are as follows:

When calculating the blast pressure, use the equation to consider the effects of decoupling. Depending on whether you are considering the effects of the blast periphery length, use  or to calculate the value.

The final computed blast function can be calculated using the equation suggested by Starfield and Pugliese (1968) that considers the Window Function:

Parameter

[Blasting Velocity(V)] : Input the blasting velocity. The fixed unit can change depending on the suggested equation.

[Explosive Density(S)] : Input the density of explosives. The units are fixed as [g/cm3].

[Charge Diameter(dc)] : Input the explosive diameter. The units are fixed as [mm].

[Borehole Diameter(dh)] : Input the diameter of the borehole. The units are fixed as [mm].

[Maximum Charge Amount (W)] : Input the maximum charge per delay. The units are fixed as [kg].

[Load Factor(B)] : Input the load coefficient.

[Sound Velocity in Rock(C)] : Input the ground sound velocity. It is only considered in the ‘Liu & Tidman, 1995’ equation and the units are fixed as [km/sec].

[Rock Density(D)] : Input the ground density. It is only considered in the ‘Liu & Tidman, 1995’ equation and the units are fixed as [g/cm3].

Time

[End time] : Input the final time for blast load creation. The units are fixed as [sec].

[Time Increment] : Input the time increment for blast load creation. The units are fixed as [sec].

Graph option

[X-axis log scale] : Output the X axis in log scale.

[Y-axis log scale] : Output the Y axis in log scale.

Equivalent Transform Blasting Load

Consider the equivalent blasting load. (When considering, refer to the content above)

Blasting Hole Perimeter (L)

Input the blast periphery length. The units are fixed as [mm].

Train Dynamic Load

[Name]: Define name.

[Train Type] : User can directly input the distance/force depending on the number of wheels.

[Number of Wheels] : Stands for the number of wheels on the train. It is the same as the added number on the table.

[Train Velocity] : Input the velocity of the train. The units are fixed as [km/hr].

[Element Size] : Input the size of the element which the train passes through. The units are fixed as [m].

The input element size and train velocity can be used to compute the arrival time when constructing the influence line function. For railway moving load, the load is applied gradually to the node as the train arrives and decreases as the load is removed, hence creating a triangle shaped load function form.

[Table] : Input the dynamic load of the train. Typical domestic train loads are provided in the database and the load can also be input by the user defined load (Number of wheels/Length/Force).

• Number : Input the wheel number. The number starts from 1 and the wheel spacing and force are input sequentially.

• Length : Input the wheelbase. For the first starting wheel, the length is input as 0.

• Force : Input the axial load acting on the wheels. The axial load can be divided into 2 and used as a working load.

[Scaling] : Input the gradient modulus of the railway dynamic load.

• Scale factor : Input the gradient modulus.

• Maximum value : Modify the railway dynamic load data such that the maximum load value becomes the specified desired value.

[Start time] : Input the start time of the railway load. The default value is 0 sec.

[Import] : Import a railway dynamic load in MS-EXCEL format. It is only activated when the train type is set to User Defined.