The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 08, 2013
Filed:
Apr. 08, 2011
Daisuke Nishiura, Yokosuka, JP;
Hide Sakaguchi, Yokosuka, JP;
Daisuke Nishiura, Yokosuka, JP;
Hide Sakaguchi, Yokosuka, JP;
Japan Agency for Marine-Earth Science and Technology, Yokosuka-shi, Kanagawa, JP;
Abstract
The memory size used in DEM calculation of particle having a particle diameter distribution is suppressed. A particle simulator includes a particle-information retaining unitholding particle information including position and velocity information of a particle group, a particle-number changing unitassigning particle numbers specifying particles in an order in accordance with the positions of the particles to the particle, a contact-candidate-list preparing unitselecting particle pairs of a target particle and another particle that may be in contact with the target particle, a contact determining unitcalculating contact forces generated between particles in the particle pairs on the basis of particle information and storing the contact forces in the contact-force tables, a contact-force calculating unitextracting contact forces of particles having a diameter greater than particles from contact-force tables using a contact-force reference table, extracting contact forces of particles having a diameter smaller than the particles by specifying the storage positions in the contact-force tables using integrated-contact-candidate numbers s_jgi[i], and calculating the sum of the contact forces, and a particle-information updating unitupdating the particle information on the basis of the contact forces of the particle.