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6Â¥2018-07-19 23:10:31
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% This function is used to calculate the pressure distribution of journal bearing without taking the deformation into account delta_m=2*pi/m; %ÑØÔ²ÖÜ·½Ïò¾ùÔÈ»®·Öm¸ñ delta_n=2/n; %ÑØÖáÏò¾ùÔÈ»®·Ön¸ñ for j=1:n+1 %¶Ô¸÷½Úµã¸³Ñ¹Á¦³õֵΪ0 for i=1:m+1 P(i,j)=0; Q(i,j)=0; end end S=0; T=0; for j=2:n %µÚÒ»´Î¼ÆËã¸÷ÄÚ²¿½ÚµãµÄѹÁ¦Öµ for i=2:m A=(1+e*cos((i+1/2-1)*delta_m))^3; B=(1+e*cos((i-1/2-1)*delta_m))^3; C=((1/ratio)*delta_m/delta_n)^2*(1+e*cos((i-1)*delta_m))^3; D=C; E=A+B+C+D; F=delta_m*e*(cos((i+1/2-1)*delta_m)-cos((i-1/2-1)*delta_m)); P(i,j)=(A*P(i+1,j)+B*P(i-1,j)+C*P(i,j+1)+D*P(i,j-1)-F)/E; if (P(i,j)<=0) %ÒýÈëÀ×ŵ±ß½çÌõ¼þ for k=i:m P(k,j)=0; S=S+abs(Q(k,j)); T=T+abs(P(i,j)); Q(k,j)=P(k,j); end break; end S=S+abs(P(i,j)-Q(i,j)); T=T+abs(P(i,j)); Q(i,j)=P(i,j); end end while(S/T>0.001) %Ñ»·¼ÆËã¸÷ÄÚ²¿½ÚµãµÄѹÁ¦Öµ S=0; T=0; for j=2:n for i=2:m A=(1+e*cos((i+1/2-1)*delta_m))^3; B=(1+e*cos((i-1/2-1)*delta_m))^3; C=((1/ratio)*delta_m/delta_n)^2*(1+e*cos((i-1)*delta_m))^3; D=C; E=A+B+C+D; F=delta_m*e*(cos((i+1/2-1)*delta_m)-cos((i-1/2-1)*delta_m)); P(i,j)=(A*P(i+1,j)+B*P(i-1,j)+C*P(i,j+1)+D*P(i,j-1)-F)/E; if (P(i,j)<=0) for k=i:m P(k,j)=0; S=S+abs(Q(k,j)); T=T+abs(P(k,j)); Q(k,j)=P(k,j); end break; end S=S+abs(P(i,j)-Q(i,j)); T=T+abs(P(i,j)); Q(i,j)=P(i,j); end end end %P; %´Ë²¿·ÖÊǵ±±¾º¯Êýµ¥¶ÀʹÓÃʱ£¬ÓÃÓÚ»æÖÆÀëɢѹÁ¦·Ö²¼ %for i=1:m+1 % x(i)=(i-1)*delta_m; %end %for j=1:n+1 % y(j)=(j-1)*delta_n; %end %figure |
2Â¥2016-01-14 15:28:03
Dr_Kevin
ľ³æ (СÓÐÃûÆø)
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3Â¥2016-01-15 09:54:04
Dr_Kevin
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4Â¥2016-01-15 10:23:49














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