Vim li cas thiaj yuav tsum muaj qhov tseeb ntawm qhov ntsuas qhov ntsuas siab yog 1.6 tsis yog 1.5?
Kev ntsuas qhov tseeb ntawm qhov ntsuas siab siv R5 tus lej system. Yav dhau los, 1.5 ntawm qib ntsuas tsis tau koom nrog R5 Coefficient, yog li nws yuav tsum tau muab tshem tawm thiab hloov los ntawm 1.6, qhov ze tshaj plaws rau 1.5. Yog li ntawd, nws tsis raug tso cai rau qib ntsuas lub siab mus rau 1.5. Vim li cas thiaj yuav tsum ntsuas qhov tseeb ntawm qhov ntsuas qhov ntsuas dav dav yog 1.6 tsis yog 1.5? Nws yog ib qho tsim nyog kom nkag siab txog cov kev paub yooj yim ntawm Preferential Coefficient hauv cov txheej txheem kev siv tshuab. Rau cov lej system, National Standard GB / T321 tau teev tseg "Qhov tseem ceeb ntawm tus lej", uas siv qhov sib piv ntawm 10 rau lub zog ntawm 1 / n, thiab muaj 10 rau lub zog ntawm 1/5,1/10,1 /20,1/40,1/80 raws, thiab cov npe code yog R5, R10, R20, R40, R80 raws. Qhov tseeb qhov ntsuas ntawm qhov ntsuas siab yog raws li R5 tus lej system. Qhov sib piv ntawm R 5 tus lej system yog: 10 txog 15 lub zog=1.60. Cov lej hauv cov lej suav nrog: 1.0,1.6,2.5,4.0,6.3, thiab 10. yav dhau los, 1.5 ntawm qib ntsuas tsis tau koom nrog R5 Coefficient, yog li nws yuav tsum tau muab tshem tawm thiab hloov los ntawm 1.6, qhov ze tshaj plaws. kwv yees li 1.5. Yog li ntawd, nws tsis raug tso cai rau qib ntsuas lub siab mus rau 1.5. Qhov piv ntawm ob tus lej uas nyob ib sab yog sib npaug rau qhov sib piv ntawm R 5 tus lej system 1.6. Piv txwv li: 10/6.3=1.6,6.3/4=1.6,4/2.5=1.6,2.5/1.6=1.6,1.6/1=1.6,0.63/0.4=1.6,0.4/0.25=1.6,0.25/1.6 , 0.25/0.16=1.6, ... Tau kawg, yog tias koj ua qhov hloov pauv, koj tuaj yeem muab ob sab ntawm qhov raug theem los ntawm kev sib npaug. Piv txwv li, 2.5 yog 1.6=1.6, thiab 2.5 × 1.6=4. Cov lus qhia ntxaws txog tus lej system tuaj yeem pom hauv lub tebchaws tus qauv.
Qhov txawv ntawm qhov raug chav kawm 1.6 thiab qhov raug chav kawm 1.5 yog dab tsi? Qib raug ntawm lub ntsuas ntsuas siab yog qhov feem pua ntawm qhov kev tso cai yuam kev ntawm qhov ntsuas mus rau tag nrho. Piv txwv li, yog tias tag nrho cov ntsuas qhov ntsuas siab yog 100 MPA thiab qhov tseeb qib yog 1.6, qhov kev tso cai yuam kev ntawm qhov ntsuas yog 100 MPA × 1.6%=± 1.6 MPA. Yog tias qhov tseeb raug ntsuas ntawm 1.5, qhov kev tso cai yuam kev yog 100 MPA × 1.5%=± 1.5 MPA. Hauv kev siv ib txwm muaj, qhov tseeb ntawm qhov ntsuas ntsuas tau hu ua qhov tseeb ntawm qhov ntsuas. Qhov me dua qhov kev siv yuam kev yog, qhov tseeb ntawm qhov ntsuas yog siab dua, thiab qhov kev siv yuam kev yog cuam tshuam nrog ntau yam ntawm qhov ntsuas. Hauv kev ntsuas kev lag luam, txhawm rau qhia qhov zoo ntawm cov cuab yeej siv tau yooj yim, qib raug feem ntau yog siv los qhia qhov tseeb ntawm qhov ntsuas. Qhov ntsuas qhov tseeb yog qhov siab tshaj qhov yuam kev rho tawm qhov ntxiv, rho tawm, thiab feem pua. Qib raug yog ib qho tseem ceeb indexes los ntsuas qhov zoo ntawm cov cuab yeej. Hauv kev ntsuas kev lag luam, qib raug feem ntau yog siv los qhia qhov ntsuas qhov zoo. Qhov ntsuas qhov tseeb yog qhov siab tshaj qhov yuam kev rho tawm qhov ntxiv, rho tawm, thiab feem pua. Qib raug yog ib qho tseem ceeb indexes los ntsuas qhov zoo ntawm cov cuab yeej.