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Experimental specimens are manufactured and tested showing good agreement with the numerical results, validating the proposed variable stiffness implementation.
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The development of the spring components' strength and stiffness and its implementation in OpenSEES are described.
The second generation of a virtual spring-damping system (Vck), developed in the Marine Renewable Energy Laboratory (MRELab), enables embedded, real-time, computer-controlled change of viscous damping and spring stiffness for fast implementation of oscillator particulars.
Commercially available finite element method (FEM) software, i.e., ANSYS (V14.0), is used to verify the correct implementation of the stiffness method.
A large deformation implementation of the direct stiffness method is shown to provide good prediction of the stiffness properties of the prototype truss.
However, also proprietary software may provide the means for accessing data structures such as stiffness matrices and utilize those in an efficient implementation of various methods.
The proposal is also compared with the classical CPU implementation for diverse topology optimization problems, including stiffness maximization, heat sink design and compliant mechanism design.
Results demonstrate the successful implementation of FRP with an improvement in stiffness, strength and lateral displacement capacity of the rehabilitated structure.
We outline the implementation details of the non-conforming direct stiffness summation algorithm for the CG method and show that the mass conservation error is similar to the DG method.
In the conventional FEM implementation, the most time-consuming procedures are assembling the stiffness matrix and solving linear equations.
This variable stiffness architecture was previously proposed by researchers who performed an experimental implementation and demonstrated a 10× change in stiffness.
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