Abstract
A simple model is proposed to study the load-securement properties of indirect tiedowns under a longitudinal deceleration. The elasticity of the tiedown is expressed by an equivalent stiffness as a function of the material properties, tiedown angle, initial tension and cargo geometry. The equivalent stiffness is observed to be a strongly nonlinear function of cargo displacement and tiedown angle. The model further incorporates the effects of load-deck interface friction and vertical trailer vibration. The dynamic response characteristics of the restrained cargo are evaluated in terms of peak cargo motion and peak tiedown force under a longitudinal deceleration. The model is utilized to study the effects of tiedown materials, tiedown angle, cargo-deck friction and nature of vertical vibration (frequency, amplitude and phase). The results of the analysis revealed the strong influence of cargo-deck friction, vibration amplitude, tiedown material and tiedown angle on the potential cargo movement. The initial tension is also found to influence the effectiveness of the restraints.
| Original language | English |
|---|---|
| Pages (from-to) | 93-114 |
| Number of pages | 22 |
| Journal | Heavy Vehicle Systems |
| Volume | 9 |
| Issue number | 2 |
| DOIs | |
| State | Published - 2002 |
| Externally published | Yes |
Keywords
- Cargo dynamics
- Cargo restraint
- Heavy vehicles
- Indirect tiedowns
- Road transport