gusucode.com > matlab对发动机悬置系统优化文章和程序 > code/youhuazhuhanshu.m

    %******************************刚度参数优化主函数程序**********************************
global  s1 s2 %设计变量变化范围上下限为全局变量
%******************************悬置元件各向刚度**********************************
k_mount(1,1)=1.4e1;    k_mount(2,1)=1.4e1;    k_mount(3,1)=0.800e1;%1号悬置x、y、z方向刚度
k_mount(1,2)=1.4e1;    k_mount(2,2)=1.4e1;    k_mount(3,2)=0.800e1;
k_mount(1,3)=1.4e1;    k_mount(2,3)=1.4e1;    k_mount(3,3)=0.800e1;
k_mount(1,4)=1.4e1;    k_mount(2,4)=1.4e1;    k_mount(3,4)=0.800e1;
s1=0.5; s2=0.5; 
k_mount=k_mount*1e-1;
k_eng=[k_mount(1,1),k_mount(2,1),k_mount(3,1)];
k_trans=[k_mount(1,2),k_mount(2,2),k_mount(3,2)];
k_eng_frt=[k_mount(1,3),k_mount(2,3),k_mount(3,3)];
k_trans_rr=[k_mount(1,4),k_mount(2,4),k_mount(3,4)];
x0=[k_eng,k_trans,k_eng_frt,k_trans_rr];%悬置元件各向刚度初始值
k_eng_l=[k_mount(1,1)-k_mount(1,1)*s1,k_mount(2,1)-k_mount(2,1)*s1,k_mount(3,1)-k_mount(3,1)*s1];
k_trans_l=[k_mount(1,2)-k_mount(1,2)*s1,k_mount(2,2)-k_mount(2,2)*s1,k_mount(3,2)-k_mount(3,2)*s1];
k_eng_frt_l=[k_mount(1,3)-k_mount(1,3)*s1,k_mount(2,3)-k_mount(2,3)*s1,k_mount(3,3)-k_mount(3,3)*s1];
k_trans_rr_l=[k_mount(1,4)-k_mount(1,4)*s1,k_mount(2,4)-k_mount(2,4)*s1,k_mount(3,4)-k_mount(3,4)*s1];
lb=[k_eng_l,k_trans_l,k_eng_frt_l,k_trans_rr_l];%悬置元件各向刚度下限值
k_eng_u=[k_mount(1,1)+k_mount(1,1)*s2,k_mount(2,1)+k_mount(2,1)*s2,k_mount(3,1)+k_mount(3,1)*s2];
k_trans_u=[k_mount(1,2)+k_mount(1,2)*s2,k_mount(2,2)+k_mount(2,2)*s2,k_mount(3,2)+k_mount(3,2)*s2];
k_eng_frt_u=[k_mount(1,3)+k_mount(1,3)*s2,k_mount(2,3)+k_mount(2,3)*s2,k_mount(3,3)+k_mount(3,3)*s2];
k_trans_rr_u=[k_mount(1,4)+k_mount(1,4)*s2,k_mount(2,4)+k_mount(2,4)*s2,k_mount(3,4)+k_mount(3,4)*s2];
ub=[k_eng_u,k_trans_u,k_eng_frt_u,k_trans_rr_u];% 悬置元件各向刚度上限值
options=optimset('Algorithm','sqp');
[x,fval,exitflag]=fmincon('objectfun_1',x0,[],[],[],[],lb,ub,[],options);%优化函数
%fun_after_optim_1(x);%优化后频率及解耦率求解
disp(x)%显示优化后的自变量值