• Cryomodule transportation
• nonlinear vibrations
• Vibration suppression
• Wire rope isolators

Cryomodules are intricate assemblies of superconductive cavities that accelerate particle
beams, used in high-energy physics experiments. The assemblies are composed of delicate
and fragile components that must be assembled with precision in a particular environment.
This makes them highly susceptible to damage during transportation. To mitigate that risk,
specialized fixtures have been developed to ensure the safe transportation. Essential components of transportation tooling are wire rope isolators. They provide stiffness and damping
to the structure and are compact and reliable. They effectively isolate the cryomodule from
external shocks and vibrations and can withstand high levels of acceleration and deceleration during transportation. The main focus of this thesis is to utilize a finite element and
multi-body mixed approach for the numerical simulation of a SSR2 cryomodule during transportation. This method allows for a comprehensive simulation of the cryomodule’s behavior
and responses to external forces and vibrations during transportation. Two different models
for the wire rope isolators are compared. The first model is the conventional linear springdamper model, which is based on data provided by the manufacturer. The second model
is a nonlinear model, specifically an enhanced Bouc-Wen model, which has been developed
based on experimental characterization of the springs. This comparison will provide insights
into the limitations of the conventional model and the potential benefits of using a more
advanced nonlinear model. The dynamic behavior of an SSR1 cryomodule was also studied
in this project, and experiments were conducted on the support post to improve the accuracy
of the finite element model and provide a more accurate representation of the cryomodule’s
behavior. By analyzing the dynamic behavior of the cryomodule, the thesis aimed to identify
potential issues that could arise during transportation and to develop solutions to mitigate
these issues.