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1 results about "Verlet integration" patented technology

Verlet integration ([vɛʁˈlɛ]) is a numerical method used to integrate Newton's equations of motion. It is frequently used to calculate trajectories of particles in molecular dynamics simulations and computer graphics. The algorithm was first used in 1791 by Delambre and has been rediscovered many times since then, most recently by Loup Verlet in the 1960s for use in molecular dynamics. It was also used by Cowell and Crommelin in 1909 to compute the orbit of Halley's Comet, and by Carl Størmer in 1907 to study the trajectories of electrical particles in a magnetic field (hence it is also called Störmer's method). The Verlet integrator provides good numerical stability, as well as other properties that are important in physical systems such as time reversibility and preservation of the symplectic form on phase space, at no significant additional computational cost over the simple Euler method.

Water-soil coupling single-layer two-phase spf simulation method, device, equipment and medium

The present application belongs to the technical field of numerical simulation and geotechnical engineering, and provides a water-soil coupled single-layer two-phase SPH simulation method, device, equipment and medium, wherein the method comprises: discretizing a calculation domain of a single-layer two-phase SPH particle model, giving physical parameters and establishing a neighbor list of particles; adopting Verlet integration to perform twice semi-step updating and once full-step updating; adopting a low-dissipation Riemann solver-based dissipation strategy to process the interaction between particles; according to the updating result, adopting a Drucker-Prager model and a return mapping algorithm to update stress and strain, to obtain an updated stress field; performing diffusion smoothing processing on the updated stress field, to obtain a single-layer two-phase SPH simulation result. The present application has the beneficial effect of realizing efficient, stable and accurate simulation of large deformation processes of geological disasters such as landslides and debris flows under water-soil coupling conditions.
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