METHOD AND DEVICE FOR MODELING ELASTIC BODY SHAPE, AND METHOD AND DEVICE FOR ACOUSTICAL SIMULATION USING THE SAME METHOD FOR MODELING

摘要

PROBLEM TO BE SOLVED: To provide a method etc., for modeling an elastic body shape from a shift in the position of an elastic body.;SOLUTION: It is assumed that a segment between the adjacent driving points of the elastic body having a plurality of driving points where driving is possible is a set of a finite number of rigid body links. The difference between the angles of the (n-1)-th link from one end side of the adjacent driving point and the n-th link is denoted as q_n, and the length of the n-th link is denoted as l_n to represent the position (x_n, y_n) of an end of the n-th link, and q1 to q2 are derived from the principle of virtual work, Castigliano's 1st theorem, and Lagrange's equations of motion by denoting a target driving point as (P_x, P_y), force operating on the driving point as F(F_x, F_y), virtual displacement caused by the force F as δ(δ_x, δ_y), the coefficient of elastic force operating on between the (n-1)-th and n-th links as k_n, potential energy of the whole system as U, kinetic energy as T=0, and Lagrangian L as T-U.;COPYRIGHT: (C)2005,JPO&NCIPI