SE-07-TM-011 管 の応力 肉厚計算

1 1 SE-07-TM-011 ( ) / ( ) ( ) 19 1. / 2. 3 4. Lame 5 / / / / / / / / Basic 1 / / (1)(3) P [{Do /(2t)} y ] t PDo/(2 2yP) (N/mm2) P (MPa) Do (mm) t (mm) y ( )

2 Lame Lame Lame Lame 0 Creep Common ASME ASME ( ) P P ( ) ( ( 2) (2) ) 2 ( 1 ) / (Di) ( 1 ) Lame Lame Lame ( 2 ) t P[{(ro/r)2 1}/(Y2 1)] l P{1/(Y2 1)} r P[{(ro/r)2 1}/(Y2 1)] r ro ri Y ( ro/ri)

3 P ( 1, 2, 3) ( r ri) r ri P{(Y2 1)/(Y2 1)} P{(Do2 Di2)/ (Do2 Di2)} {Do2 (Do 2t)2}/[2t{Do (Do 2t)}] {(1/2)(Do/t)2 (Do/t) 1}/{(Do/t) 1} Lame Lame (Do/t) 2 Lame PDo/(2t) P [{Do /(2t)} y} Lame Do/Di ( Do/t 6 ) Lame {(1/2)(6)2 (6) 1}/{(6) 1}P , P{(1/ )(6) y} (3 y)P (3 y)P y P [{Do /(2t)} ] Lame Do/t Lame / 50 ( ) 30 ( ) 10 ( ) 8 ( ) 6 (0 ) 3 / Do/t 6 (Do /Di ) y P [{Do /(2t)]]

4 } ] y= Lame t / ( x )/ PAf/Am t t 2(a) 1 PAf PDi Am 2t t PAf/Am PDi/(2t) P(Do 2t)/(2t) P[{Do/(2t)} 1] 2(a) Af Di(x1) Af 2(b)(c) [=(Do Di)/2] Do t P{(Do Di)/2}/(2t) P[{Do (Do 2t)}/2]/(2t) P[{Do/(2t)} ] t PDo/(2t) [{Do/(2t)} 0] P [{Do/(2t)} y] 1 y y 0 [(ro/ri) ] JISB8271 ( x 3 ) Creep Common ASME (1)

5 Creep Common Burrows 4 Creep Common ASME 1952 ASME ASME / / 482 692 C y Lame y Creep Common y= 2. (1) / ( ) ( (12 ) t PDi/(2 a ) --------------------------(2-1a) JIS B8265 E t PR/( a ) -------------------------(2-1b) JPI 7S-77.)

6 T PD/(2SE 2YP) ---------------------------------------( 2-1c) ( 3) (12 ) t (Di/2)[{( a P)/( a P)} 1] -----------------(2-2a) JIS B8265 E t R( 1) Z ( a P)/( a P)-----------(2-2b) t (mm) P ( )(MPa) a, S (N/mm2) Di (mm) R (mm) D (mm) ,E ( ) Y JIS B8265 JPI 7S-77 ASME JISB8265 Di 2R t (1/4)Di t (1/4)Di t (1/4)Di JISB8265 P a P a P a JISB8265 t PR/( a ) P/( a ) 2/(Di/t ) P/( a ) 2/(Di/t ) Di/t 2 4 t (1/4)Di JIS.

7 (2) 2(a) / Af 2 0 /2 Rsin d 2R Di / Am 2t PAf/Am PDi/(2t) t PDi/(2 ) (Di) 5 Di Di t t P(Di t)/(2 ) t PDi/(2 P) a (1a) PDi/(2 a ) 2(b) Lame P{(Y2 1)/(Y2 1)} /P (Y2 1)/(Y2 1) Y2 ( P)/( P) Y ro/ri (ri t)/ri (ri t)/ri {( P)/( P)} ri [{( P)/( P)} 1] ri=Di/2 a t (Di/2)[{( a P)/( a P)} 1] (2-2a) (3) (1a) Lame (2a) Lame (2-2a) Lame Lame (2-1a) t PDo/(2 )=P(Di 2t)/ (2 ) t PDi/(2 ) t PDi/(2 a ) Lame Lame 1.

8 / t [ t l r t, l, r 6 t Max ] ASME 1 ( ) 2 ( ) ( ) 2 / / ( Tresca ) (Tresca ) (4) Lame t l r t l r S1 S1 | t r| S2 | l r S3 | t l| t r 1 2 1 (Pm)

9 Tm lm rm Pm Pm | tm rm| tm, rm t, r tm {1/(ro ri)} tdr {1/(ro ri)}{P/(Y2 1)} {(ro/r)2 1}dr P/(Y 1) Pri/t rm {1/(ro ri)} rdr {1/(ro ri)}{P/(Y2 1)} {(ro/r)2 1}dr P/(Y 1) Pri/(ro ri) Pm (Pm Tresca ) Pm | tm rm| {2Y/(Y2 1)}P ---------------------------------------- -----------(2-3) ( ro ri) Pm a ri [(P/Pm 1) {1 (P/Pm)2} ] ri [ {P/( a ) 1} [1 {P/( a )}2] ] -----(2-4 ) Pm( ) Lame ( JIS ) Lame ( JIS ) ( ) 3 7 Y ( /P) P ( /P) Y Y