function disper %绘制平板频散曲线 %tic clc;clear; cl=5790;%材料纵波波速（钢板） cs=3200;%材料横波波速（钢板） dfd=0.01*1e3; fd0=(0.01:dfd/1e3:20)*1e3;%频厚积（MHz*mm） d_Q235=6; cps_min=2700; cpa_min=100; cp_max=10000; mode=3;%绘制的模式数 precision=1e-8; cpa=zeros(length(fd0),mode); cps=zeros(length(fd0),mode); for i=1:length(fd0) fd=fd0(i); [cp12 n]=ss(cps_min,cp_max,fd,cl,cs,mode); for j=1:n cp1=cp12(j,1); cp2=cp12(j,2); cps(i,j)=serfen(cp1,cp2,fd,cl,cs,precision); end [cp12 n]=aa(cpa_min,cp_max,fd,cl,cs,mode); for j=1:n cp1=cp12(j,1); cp2=cp12(j,2); cpa(i,j)=aerfen(cp1,cp2,fd,cl,cs,precision); end end h=zeros(mode,2); %相速度 figure(1) for j=1:2 if j==1 cp=cps; color='b'; else cp=cpa; color='r'; end for i=1:mode cpp=cp(:,i); ind=find(cpp==0); if ~isempty(ind) h(i,j)=plot((fd0(ind(end)+1:end))/d_Q235,cpp(ind(end)+1:end),color); else h(i,j)=plot(fd0/d_Q235,cpp,color); end hold on end if j==2 xlabel('f/(KHz)') ylabel('C_{p}/(km·s^{-1})') title('6mm 钢板 相速度频散曲线') set(gca,'xtick',(0:0.6:20)*1e3/d_Q235,'xticklabel',(0:0.6:20)*1e3/d_Q235) xlim([0, 1000]);% set(gca,'ylim',[0 cp_max],'ytick',(0:cp_max/1e3)*1e3,... 'yticklabel',0:cp_max/1e3) grid on hSGroup = hggroup;%要在子对象构建之后构建，构建后立即使用，否则将失效 hAGroup = hggroup; set(h(:,1),'parent',hSGroup) set(h(:,2),'parent',hAGroup) set(get(get(hSGroup,'Annotation'),'LegendInformation'),... 'IconDisplayStyle','on'); set(get(get(hAGroup,'Annotation'),'LegendInformation'),... 'IconDisplayStyle','on'); legend('对称模式','反对称模式') end end %群速度 figure(2) for j=1:2 if j==1 cp=cps; color='b'; else cp=cpa; color='r'; end for i=1:mode cpp=cp(:,i); ind=find(cpp==0); if ~isempty(ind) fd=fd0(ind(end)+1:end)'; cpp=cpp(ind(end)+1:end); else fd=fd0'; end dcdf=diff(cpp)/dfd; cg=cpp(1:end-1).^2./(cpp(1:end-1)-fd(1:end-1).*dcdf); h(i,j)=plot(fd(1:end-1)/d_Q235,cg,color); hold on end if j==...
