Axle

The Axle component is required to define the options in the Axle Properties section.

Axle Properties



Figure 1. Axle Component - Axle Properties
Type
Defines the type of axle orientation.
  • UnderSlung:


    Figure 2.
  • OverSlung:


    Figure 3.
Front Inactive Length
Defines the estimated inactive length on the front half of the spring.
Rear Inactive Length
Defines the estimated inactive length of the rear half of the spring.
Leaf Pack Thickness
Defines the pack thickness at the center of the leaf spring. This is now redundant and you do not have to enter it anymore.
Load on Leaf Pack
Provides the force that has to be applied to the leaf system for design-loading.
Angle with x-axis
Angle of the leaf pack with x-axis that is positive in the counter clockwise direction and negative in the clockwise direction.
Leaf Reference Location
Specify the bolt center location of the top or bottom leaf in the leaf pack depending upon the axle type of the system.
  • If the system is ‘Underslung’, then it will be a bolt center location of the top most leaf.
  • If the system is ‘Overslung’, then it will be a bolt center location of the bottom most leaf.
This is optional, however it is advisable to mention it for accurate referencing of the leaf spring system.
An example of how a Leaf Reference Marker block is represented in a TiemOrbit file format is shown below:
$------------------------------LEAF_REF_MARKER
[LEAF_REF_LOC]
X = 0
Y = 0
Z = -11.25

Axle Details for Leaf Property File (*lpf)

In the Axle Details block of leaf property file, the attribute, type, and valid value to be entered in TiemOrbit file format are detailed in the following table. This table also provides information about the mandatory requirements for attributes.
An example of how an Axle Details block is represented in a TiemOrbit file format is shown below:
$-------------------------------------AXLE_DETAILS
[AXLE_DETAILS]
AXLETYPE = ‘OVERSLUNG’
FRONTINACTIVELENGTH = 60
REARINACTIVELENGTH = 60
LEAFPACKTHICKNESS = 30
LOAD = 0
Block Name = ‘AXLE_DETAILS’ (Required)
Attributes Type Valid Value Required
axleType String ‘UNDERSLUNG’,

‘OVERSLUNG’

 Yes
frontInactiveLength Real - Yes
rearInactiveLength Real - Yes
leafRotAngle Real Angle of the leaf with x-axis that is +ve in counter clockwise direction and vice versa. Yes
leafPackThickness Real - Optional
Load Real - Optional