Spreadsheet for completely describing the crane (pre-processing) Įvery cell has a graphical remark to guide the STERK© user.Interpretation of STERK© source code, using STERK© during the making of ratings.Description of the validation of the STERK© code with STERK©.Eager.sterk© calculates your crane capacity chartsĮager.sterk© is our in-house design software to calculate capacity charts for all kinds of cranes, independent of any brand. 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. However, this is not a quick process, especially when it comes to many different configurations of a crane. Historically, these calculations are done by “nonlinear” FEM (finite element method). Additional longitudinal bending due to change of shapeįor every boom-, jib length and lifting radius it requires a cyclic (nonlinear) calculation to predict the deformations.Additional side-ward bending moment due to change of shape.Additional loads on the crane induced by geometrical changes.
What does this mean for the determination and calculation of the crane capacity? Since the 2 nd order effect increases for slender (high) cranes, calculations get more complex and more time-consuming due to its non-linear (cyclic) character. Cranes are getting higher with increased slenderness as a result.
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