<DIV class=quote><B>以下是引用<I>kevinhcj</I>在2006-3-14 18:36:29的发言:</B><BR>
<P>ok!<BR><BR>%subrution<BR>function C_b1 = element_Cb2(z0,z1,t,bb)<BR>syms Xi <BR>psi = bb;</P>
<P>N1 = 1-10*Xi^3+15*Xi^4-6*Xi^5;<BR>N2 = 10*Xi^3-15*Xi^4+6*Xi^5;<BR>N3 = Xi-6*Xi^3+8*Xi^4-3*Xi^5;<BR>N4 = -4*Xi^3+7*Xi^4-3*Xi^5;<BR>N5 = 1/2*(Xi^2-3*Xi^3+3*Xi^4-Xi^5);<BR>N6 = 1/2*(1*Xi^3-2*Xi^4+Xi^5);</P>
<P>N = [N1,N3,N5,N2,N4,N6];</P>
<P>NN1 = diff(N,Xi,1);<BR>cc = (psi'*(NN1'*NN1)*psi)*(N'*N);<BR>C_b1 = int(cc,Xi,0,1);<BR>C_b1 = C_b1;<BR>C_b1 = double(C_b1);</P>
<P>return</P>
<P>% main<BR>clear all; clc;<BR>format long;</P>
<P>n = 10<BR>m = 100;<BR>zz = [0,1:n]';<BR>delta_t = 0.1;</P>
<P>C_b1_u = zeros(3*n+3);<BR>psi_q_try = ones(3*(n+1),1);</P>
<P>for j = 1:m<BR> <BR> t = delta_t*j;<BR> <BR> for k = 1:n<BR> bb = psi_q_try(3*k-2:3*(k+1));<BR> <FONT color=#ff0000> C_b1 = element_Cb1(zz(k),zz(k+1),t,bb);<BR></FONT> C_b1_u(3*k-2:3*(k+1),3*k-2:3*(k+1)) = C_b1_u(3*k-2:3*(k+1),3*k-2:3*(k+1)) + C_b1;<BR> end <BR>end<BR></P></DIV>
<P><FONT color=#ff0000>红色标记的是不是应该是<BR>C_b1 = element_Cb2(zz(k),zz(k+1),t,bb);<BR></FONT><BR>如果是的话,应该是你子程序中用int找不到积分<BR></P> |