Dynamic Structural Analysis and Strength Verification of a Thruster

When dealing with random vibrations, a non-linear dynamic analysis with ANSYS® helps to verify the strength of a thruster regarding complex loading conditions.

Dynamic Structural Analysis and Strength Verification of a Thruster

As a result of the non-linear dynamic analysis, it could be validated that the strain amplitudes during the atmosphere flight do not cross the critical failure limits of the material. In addition, the strength of the bolted connections could be verified under true dynamic load conditions which would have not been possible conducting a linear PSD analysis.

Furthermore, the analysis showed that the location of the maximum plastic strain along the nozzle is not identical to the location of the maximum equivalent stress found by simple superposition of the linearized load cases.In summary, a full non-linear transient analysis under random load excitation allows a more detailed evaluation of the mechanical stress of the structure including non-linear material and contact behavior.

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