Biomechanics Single Action Analysis Dialog Box

This ergonomic tool measures biomechanical data on a worker in a given pose using a lift-lower analysis procedure.

From the current manikin posture, the Biomechanics Single Action Analysis tool calculates and displays information. This could be the lumbar spinal loads (abdominal force, abdominal pressure, body movements) and the forces and moments on the manikin joints. All the output incorporated in the model is based on research results and algorithms published by the scientific community. The forces (loads) acting on the manikin's hands take into account in the biomechanical analysis. These forces represent the load of carry, push, lift/lower, or pull, depending on the scenario, and are available for the hands only. Both the Load Properties and the Biomechanics Single Action Analysis dialog boxes can be open at the same time. The last analysis updates when the load modifies.

This dialog box contains controls for:

This page discusses:

Summary Tab

Summary
The Summary tab gives general biomechanical information of the Analysis and the Value such as:
  • L4-L5 Moment (Nxm)
  • L4-L5 Compression (N)
    • Body Load Compression (N)
    • Axial Twist Compression (N)
    • Flex/Ext Compression (N)
  • L4-L5 Joint Shear (N)
  • Abdominal Force (N) and Pressure(N_m2)
  • Ground Reaction

L4-L5 Spine Limit Tab

The L4-L5 Spine Limit tab displays the evaluation of the posture and whether it exceeds the compression and joint shear limits. This comes from the NIOSH and the University of Waterloo.

The information on this tab can be viewed as a List of Values or as a Chart.

Joint Moment Strength Data Tab

The Joint Moment Strength Data tab displays the evaluation of the percentage of a worker population that does not have the strength to perform a task.

The information on this tab can be viewed as a List of Values or as a Chart.

This is based on strength studies such as those by Askew, An, Morrey and Chao (1987). For the elbow, Koski and McGill (1994). For the shoulder, Troup and Chapman (1969) for the lumbar.

A more complete analysis of the human biomechanics results this analysis covers both wrists in Flexion-Extension and Radial-Ulnar deviation.

Reaction Forces and Moments Tab

The Reaction Forces and Moments displays, in detail, the reaction forces (N), and orthopedic moments (Nm) Proximal and Distal segments.

This tab specifically presents a lot of data for each analyzed segment, which leads to a wide and long list. Moreover, having to read through many lines and columns of data can introduce misread errors. A better way to display the results in 3D, each segment the result highlights in the list when selecting the related segment in the 3D model.



If the segment is not part of the Biomechanics Analysis, no highlighted data displays.

Segment Positions Tab

The Segment Positions tab displays information (position, angle, center of gravity, length) about the segments

Export the Results

Export

Use Export to save the biomechanical data in a text file. See Exporting the Results