Axle

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

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.

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

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