Journal Articles

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Subject: search.filters.subject.Particle swarm optimization

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    A robust identification procedure for phase field fracture mechanics parameters /
    (Elsevier, 2023-07-13) Tota, Rakesh Kumar
    The classical Phase Field (PF) model for fracture mechanics of brittle materials based on the finite element method involves three parameters in addition to the Poisson ratio v: the Young’s modulus E, the fracture toughness Gc, and the internal length scale Ic . The latter is mathematically conceived as a numerical regularization parameter that should tend to zero to recover linear elastic fracture mechanics (LEFM) predictions. To address this issue, a robust algorithm is implemented in MATLAB, which combines Particle Swarm Optimization (PSO) and the Phase Field (PF) approach to fracture based on the finite element method. The algorithm has been applied to a series of uni-axial tensile tests (with E and Ic to be identified) and to three-point bending tests (with E, Ic and also Gc to be identified) on specimens made of ABS material. Results show that the optimal values of E and Gc are consistent in both tests, while Ic presents a significant dependency upon the test type. Therefore, different values of the internal length scale should be identified and used to match the experimental responses under uni-axial tension or bending.
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    Implementation of UPFC for voltage sag mitigation using particle swarm optimization
    (Journal of Power Electronics and Devices, 2017) Dinesh, M.; Thangalakshmi, S.
    Maintaining the voltage profile in transmission line is very much important to maintain powers system stability. Due to load fluctuations, the voltage in all the buses may not be maintained. FACTS devices are much helpful in voltage compensation. UPFC is one among the FACTS devices which is used to serve this purpose. The load is increased in IEEE 30 bus system to simulate voltage sag condition. The location of UPFC is found using particle swarm optimization (PSO). The power loss during fault and the corresponding dip in voltage is compensated using UPFC. The power flow shows that the voltage in all buses is maintained within the permissible limits. The entire simulation has been demonstrated in IEEE 30 bus system.