12/25/2023 0 Comments Idc wire rope isolators![]() ![]() In the literature, some paper reports the results of cryomodule transportation supported by WRIs. The transportation of the cryomodules is a basic but fundamental activity to allow the success of the experiments. WRIs are widely used for vibration mitigation due to their capability of reacting to forces acting along any direction, without requiring any complex kinematics and guaranteeing a tunable (by design) stiffness along each direction, also providing a relevant damping factor. A WRI consists of a metallic strand, usually made of a stainless steel cable, twisted in a helical shape, confined by two steel or aluminum brackets which allow to connect it to the structure. One of the most common and effective means of vibration isolation and suppression is the deployment of wire rope isolators (WRIs). The cost associated with the potential damage of the items being transported requires the usage of suspension systems capable of absorbing shocks and vibrations generated during transportation. Much complex and critical equipment such as aviation engines, electrical cabinets, satellites and other fragile complex assemblies are often transported with various means of transportation and in different conditions. It is shown how the Bouc–Wen formulation of the isolator characteristics drastically improves the correspondence between experimental and simulated results if compared to a spring–damper model, especially in the range of 0–30 Hz which is the most critical for transportation problems. Results and conclusionsĪn actual experimental transportation was simulated using two numerical models: the developed Bouc–Wen model and a conventional spring–damper model. A series of multibody dynamic simulations with rigid and flexible components was used to numerically determine the acceleration of some critical components. The developed model of the isolator has been implemented in a larger model to simulate the actual transportation of the prototype SSR1 cryomodule, a section of the new PIP-II linear accelerator under construction at Fermilab. Materials and methodsĪ hysteretic Bouc–Wen model has been used to analytically describe the force–deformation relationship of the wire rope isolators. ![]() This paper describes the experimental tests conducted on a wire rope isolator used for the transportation of the prototype SSR1 cryomodule. However, this simple model has proved to be too simplistic to be used in the development of an accurate numerical model that can predict the vibration levels experienced by the inner components of fragile equipment during its transportation. When deployed as suspension systems in a transportation scenario, a simple spring–damper model is often used to predict the dynamic loads that act on the structure being transported. Wire rope isolators are often used as means of vibration isolation for the transportation of fragile machine equipment. ![]()
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