Abstract
The governing equation of elasticity is discretized into the motion equations of the particles using the least square method. Using the symplectic scheme for a Hamiltonian system, we can obtain energy conservation for discretized calculations. However, local particle oscillations occur, which excessively decreases low frequency motion. In this study, we propose an artificial force to suppress the local oscillations, without affecting the physical property. With and without the force, accuracies are compared using a loaded bar model and wave propagation models. The local oscillations are reduced by the proposed artificial force.
