clear?all;
clc;
global?w;
global?u;
%global?E;
%global?beta;
u=0.00007;
f0=250;
range=[2.5:0.05:4];
k=1;
YY=[];
z0=[0?0.001?1.27e-3?0.001];
for?w=range
???period=2*pi/w;
???step=period/512;
????w
????%j=j+1;
?????%?discard?the?first?***?periodic?data;
?????%除去前面2000個周期的數據，并將最后的結果作為下一次積分的初值
?????tspan=[0:step:2000*period];
?????%options=odeset（‘RelTol‘10^-3‘AbsTol‘10^-5）;
????[tY]=ode45（‘rubbing‘tspanz0）;
????z0=Y（end:）
????%j=1;
???%?for?i=2000:2200
????????tspan=[2000*period:step:2100*period];
????????%options=odeset（‘RelTol‘10^-3‘AbsTol‘10^-5）;
????????[tY]=ode45（‘rubbing‘tspanz0）;
????????YY（k:）=Y（1:512:end1）;???%?get?the?omega?data?from?every?period?end
????????%j=j+1;???????????????
????????z0=Y（end:）;
????????k=k+1;
????%end
end
bifdata=YY（:end-51:end）;
plot（rangebifdata‘k.‘‘LineWidth‘1）;
xlabel（‘頻率比w/w0‘）;ylabel（‘x‘）;title（‘隨頻率比變化的分岔圖‘）;
%xlabel（‘剛度比kc/k0‘）;ylabel（‘x‘）;title（‘隨剛度比變化的分岔圖‘）;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件????????1023??2012-10-28?17:04??碰摩轉子分岔圖matlab程序\Bifurcation.m
?????文件?????????485??2012-10-28?16:34??碰摩轉子分岔圖matlab程序\rubbing.m
?????目錄???????????0??2012-11-07?14:12??碰摩轉子分岔圖matlab程序\