Calculation of crane capacity charts with Eager.sterk

2^nd order effect? What is that?

• Additional loads on the crane induced by geometrical changes
• Additional side-ward bending moment due to change of shape
• Additional longitudinal bending due to change of shape

For every boom-, jib length and lifting radius it requires a cyclic (nonlinear) calculation to predict the deformations. Historically, these calculations are done by “nonlinear” FEM (finite element method).  However, this is not a quick process, especially when it comes to many different configurations of a crane.

Therefore, to speed up this process Eager.one has developed a handwritten code, applicable to run different configurations at the same time, without the need for re-modelling.

Eager.sterk© calculates your crane capacity charts

Eager.sterk© is our in-house design software to calculate capacity charts for all kinds of cranes, independent of any brand.

The software consists of 6 parts:

1. A calculation code
2. Description of the validation of the STERK© code with STERK©. (Free to look into, for third parties)
3. Interpretation of STERK© source code, using STERK© during the making of ratings
4. Spreadsheet for completely describing the crane (pre-processing);
   Every cell has a graphical remark to guide the STERK© user.
5. Spreadsheet for complete description of the ratings (post-processing);
   Every load chart value (SWL@Radius) has a remark, describing the critical issue (strength, stability, etc.);
   For every rating-position or configuration a graphical output of the crane can be generated.
6. Complete summary of all results for a single load chart position (SWL@radius), including:
   • Deflections
   • Stresses
   • Bending moments
   • Shear forces

Different configurations

Interested to learn more about Eager.STERK©?

Please download our presentation using the button below or contact us. We would be happy to discuss your specific situation.

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