{"id":2305,"date":"2024-09-19T09:44:56","date_gmt":"2024-09-19T01:44:56","guid":{"rendered":"http:\/\/168hot.cn\/news\/?p=2305"},"modified":"2024-09-19T09:44:56","modified_gmt":"2024-09-19T01:44:56","slug":"%e8%b0%83%e8%8a%82%e9%98%80%e6%b5%81%e9%87%8f%e7%b3%bb%e6%95%b0%e4%b8%8e%e5%8f%af%e8%b0%83%e6%af%94%e5%85%b3%e7%b3%bb%e7%9a%84%e7%a0%94%e7%a9%b6","status":"publish","type":"post","link":"http:\/\/168hot.cn\/news\/2305.html","title":{"rendered":"\u8c03\u8282\u9600\u6d41\u91cf\u7cfb\u6570\u4e0e\u53ef\u8c03\u6bd4\u5173\u7cfb\u7684\u7814\u7a76"},"content":{"rendered":"
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\"\u8c03\u8282\u9600\u6d41\u91cf\u7cfb\u6570\u4e0e\u53ef\u8c03\u6bd4\u5173\u7cfb\u7684\u7814\u7a76-\u516c\u5f0f7\"<\/p>\n

\u5f0f\u4e2d\uff1a\u04240<\/sub>\uff0cR \u4e3a\u8fd9\u53f0\u8c03\u8282\u9600\u7684\u5b9e\u9645\u503c\uff0c\u53ef\u4ece\u65b9\u7a0b\u7ec4\uff087\uff09\u4e2d\u7528\u6700\u5c0f\u4e8c\u4e58\u6cd5\u6c42\u5176\u8fd1\u4f3c\u503c\uff1a<\/p>\n

\"\u8c03\u8282\u9600\u6d41\u91cf\u7cfb\u6570\u4e0e\u53ef\u8c03\u6bd4\u5173\u7cfb\u7684\u7814\u7a76-\u516c\u5f0f8\"<\/p>\n

\u4e00\u822c\u60c5\u51b5\u4e0b\u53d6 10 \u4e2a\u5f00\u5ea6\u8fdb\u884c\u6d4b\u91cf\uff0c\u5373 hi<\/sub> \u5206\u522b\u53bb 0.1\uff0c0.2\uff0c0.3\uff0c\u2026\uff0c1.0\u3002\u6b64\u65f6\u6709 K=10\uff0c\"\u8c03\u8282\u9600\u6d41\u91cf\u7cfb\u6570\u4e0e\u53ef\u8c03\u6bd4\u5173\u7cfb\u7684\u7814\u7a76-\u5f0f\u5b501\"=5.5\uff1b\"\u8c03\u8282\u9600\u6d41\u91cf\u7cfb\u6570\u4e0e\u53ef\u8c03\u6bd4\u5173\u7cfb\u7684\u7814\u7a76-\u5f0f\u5b502\"=3.85\uff0c\u4ee3\u5165\u5f0f\uff088\uff09\u5219\u6709<\/p>\n

\"\u8c03\u8282\u9600\u6d41\u91cf\u7cfb\u6570\u4e0e\u53ef\u8c03\u6bd4\u5173\u7cfb\u7684\u7814\u7a76-\u516c\u5f0f9\"<\/p>\n

\u5c06\u6d4b\u91cf\u6240\u5f97\u6d41\u91cf\u7cfb\u6570 \u0424i<\/sub> \u4ee3\u5165\u516c\u5f0f\uff089\uff09\uff0c\u5373\u53ef\u89e3\u51fa\u8be5\u53f0\u8c03\u8282\u9600\u7684\u5b9e\u9645\u53ef\u8c03\u6bd4 R \u503c\u3002\u82e5\u5c06\u8868 1 \u4e2d\u7b49\u767e\u5206\u6bd4\u6d41\u91cf\u7cfb\u6570\u7684\u7406\u8bba\u503c\u4ee3\u5165\u516c\u5f0f\uff089\uff09\uff0c\u5373\u53ef\u53cd\u7b97\u51fa R=30\u3002\u6309\u5f0f\uff089\uff09\u89e3\u51fa\u7684\u662f\u5168\u884c\u7a0b\u7684\u53ef\u8c03\u6bd4\uff0c\u4e3a\u4e86\u51c6\u786e\u4e86\u89e3\u8c03\u8282\u9600\u5728\u5de5\u4f5c\u6bb5\u7684\u53ef\u8c03\u6bd4\uff0chi<\/sub> \u53ef\u5206\u522b\u53d6 0.2\uff0c0.3\uff0c\u2026\uff0c0.8\uff0c\u5373 k=7\uff0c\"\u8c03\u8282\u9600\u6d41\u91cf\u7cfb\u6570\u4e0e\u53ef\u8c03\u6bd4\u5173\u7cfb\u7684\u7814\u7a76-\u5f0f\u5b503\"=3.5\uff0c\"\u8c03\u8282\u9600\u6d41\u91cf\u7cfb\u6570\u4e0e\u53ef\u8c03\u6bd4\u5173\u7cfb\u7684\u7814\u7a76-\u5f0f\u5b504\"=2.03\uff0c\u5219\u6709<\/p>\n

\"\u8c03\u8282\u9600\u6d41\u91cf\u7cfb\u6570\u4e0e\u53ef\u8c03\u6bd4\u5173\u7cfb\u7684\u7814\u7a76-\u516c\u5f0f10\"<\/p>\n

\u4ee3\u5165 20%~80% \u5f00\u5ea6\u65f6\u7684\u5404\u6d41\u91cf\u7cfb\u6570\uff0c\u53ef\u4ee5\u5f97\u5230\u8be5\u6bb5\u6d41\u91cf\u7279\u6027\u7684 R \u503c\u3002\u540c\u6837\uff0c\u5c06\u8868 1 \u4e2d\u7406\u8bba\u503c\u6570\u636e\u4ee3\u5165\u5f0f\uff0810\uff09\uff0c\u4e5f\u53ef\u53cd\u7b97\u51fa R=30\u3002\u7531\u4e8e\u5f0f\uff089\uff09\u3001\u5f0f\uff0810\uff09\u4e2d \u0424 \u503c\u90fd\u662f\u4ee5\u6bd4\u503c\u5f62\u5f0f\u51fa\u73b0\uff0c\u65e0\u8bba\u7528\u7edd\u5bf9\u6d41\u91cf\u7cfb\u6570\u6216\u76f8\u5bf9\u6d41\u91cf\u7cfb\u6570\u8ba1\u7b97\u5176\u7ed3\u679c\u90fd\u662f\u76f8\u7b49\u7684\u3002\u56e0\u6b64\uff0c\u7528\u6765\u8ba1\u7b97 R \u503c\u662f\u5f88\u65b9\u4fbf\u7684\u3002\u540c\u6837\uff0c\u5f53\u9700\u8981\u8ba1\u7b97\u4efb\u610f\u6bb5\u6d41\u91cf\u7279\u6027\u66f2\u7ebf\u7684 \u503c\u65f6\uff0c\u90fd\u53ef\u4ee5\u63a8\u51fa\u76f8\u5e94\u7684\u8ba1\u7b97\u516c\u5f0f\u3002<\/p>\n

3 \u56fd\u5185\u5916\u4e00\u4e9b\u8c03\u8282\u9600 R \u503c\u7684\u6bd4\u8f83<\/h3>\n

\u4f9d\u636e\u5f0f\uff089\uff09\u7528\u56fd\u5185\u7edf\u4e00\u8bbe\u8ba1\u7684\u53cc\u5ea7\u8c03\u8282\u9600\u548c\u8054\u5408\u8bbe\u8ba1\u7684\u5957\u7b52\u8c03\u8282\u9600\uff0c\u4ee5\u53ca Fisher \u516c\u53f8\u7684 ED \u578b\u5957\u7b52\u9600\u7684\u6d41\u91cf\u7cfb\u6570\u8ba1\u7b97\u76f8\u5e94\u7684 R \u503c\uff0c\u5176\u7ed3\u679c\u89c1\u8868 2~\u8868 4\u3002<\/p>\n

\u4ece\u8868\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u5c3d\u7ba1\u53cc\u5ea7\u8c03\u8282\u9600\u548c\u5957\u7b52\u8c03\u8282\u9600\u5728\u8bbe\u8ba1\u65f6\u9884\u5148\u8bbe\u5b9a R=30\uff0c\u4f46\u5b9e\u9645\u751f\u4ea7\u7684\u5404\u79cd\u89c4\u683c\u7684\u8c03\u8282\u9600\u5176 R \u503c\u662f\u4e0d\u76f8\u540c\u7684\u3002<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u8868 2 \u53cc\u5ea7\u8c03\u8282\u9600\u6d41\u91cf\u7cfb\u6570 \u0424 \u503c\u53ca R \u8ba1\u7b97\u503c<\/caption>\n
\u516c\u79f0\u901a\u5f84 DN\u00d7dN<\/td>\n\u5404\u76f8\u5bf9\u5f00\u5ea6 \u0424 \u503c<\/td>\n\u53ef\u8c03\u6bd4 R<\/td>\n<\/tr>\n
0.1<\/td>\n0.2<\/td>\n0.3<\/td>\n0.4<\/td>\n0.5<\/td>\n0.6<\/td>\n0.7<\/td>\n0.8<\/td>\n0.9<\/td>\n1.0<\/td>\n<\/tr>\n
25<\/td>\n2.65<\/td>\n4.57<\/td>\n7.84<\/td>\n12.76<\/td>\n17.96<\/td>\n25.04<\/td>\n35.00<\/td>\n49.11<\/td>\n74.53<\/td>\n103.39<\/td>\n51.5<\/td>\n<\/tr>\n
32<\/td>\n3.09<\/td>\n6.30<\/td>\n9.90<\/td>\n13.99<\/td>\n18.90<\/td>\n24.60<\/td>\n30.10<\/td>\n42.80<\/td>\n74.40<\/td>\n100.00<\/td>\n34.6<\/td>\n<\/tr>\n
40<\/td>\n7.44<\/td>\n10.28<\/td>\n11.52<\/td>\n13.22<\/td>\n16.88<\/td>\n21.92<\/td>\n28.82<\/td>\n52.84<\/td>\n78.92<\/td>\n92.00<\/td>\n17.4<\/td>\n<\/tr>\n
50<\/td>\n7.68<\/td>\n11.89<\/td>\n14.90<\/td>\n18.40<\/td>\n22.90<\/td>\n29.50<\/td>\n37.80<\/td>\n53.50<\/td>\n70.40<\/td>\n98.20<\/td>\n14.6<\/td>\n<\/tr>\n
65<\/td>\n3.95<\/td>\n7.72<\/td>\n11.36<\/td>\n15.53<\/td>\n20.20<\/td>\n26.56<\/td>\n36.51<\/td>\n50.77<\/td>\n77.53<\/td>\n99.58<\/td>\n28.9<\/td>\n<\/tr>\n
80<\/td>\n3.34<\/td>\n7.64<\/td>\n10.49<\/td>\n14.63<\/td>\n19.85<\/td>\n28.00<\/td>\n37.75<\/td>\n50.28<\/td>\n75.49<\/td>\n97.25<\/td>\n32.4<\/td>\n<\/tr>\n
100<\/td>\n4.70<\/td>\n7.68<\/td>\n10.32<\/td>\n14.20<\/td>\n18.81<\/td>\n27.35<\/td>\n37.02<\/td>\n52.82<\/td>\n72.39<\/td>\n97.60<\/td>\n27.1<\/td>\n<\/tr>\n
125<\/td>\n4.14<\/td>\n6.49<\/td>\n9.47<\/td>\n12.89<\/td>\n19.37<\/td>\n27.61<\/td>\n37.34<\/td>\n51.88<\/td>\n66.66<\/td>\n103.63<\/td>\n32.3<\/td>\n<\/tr>\n
150<\/td>\n2.55<\/td>\n5.70<\/td>\n8.50<\/td>\n12.42<\/td>\n18.17<\/td>\n25.45<\/td>\n34.98<\/td>\n48.48<\/td>\n76.74<\/td>\n96.81<\/td>\n45.7<\/td>\n<\/tr>\n
200<\/td>\n<\/td>\n<\/td>\n12.20<\/td>\n16.10<\/td>\n20.10<\/td>\n25.10<\/td>\n32.00<\/td>\n46.50<\/td>\n75.80<\/td>\n100.50<\/td>\n20.0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u8868 3 \u5957\u7b52\u8c03\u8282\u9600\u6d41\u91cf\u7cfb\u6570 \u0424 \u503c\u53ca R \u8ba1\u7b97\u503c<\/caption>\n
\u516c\u79f0\u901a\u5f84 DN\u00d7dN<\/td>\n\u5404\u76f8\u5bf9\u5f00\u5ea6 \u0424 \u503c<\/td>\n\u53ef\u8c03\u6bd4 R<\/td>\n<\/tr>\n
0.1<\/td>\n0.2<\/td>\n0.3<\/td>\n0.4<\/td>\n0.5<\/td>\n0.6<\/td>\n0.7<\/td>\n0.8<\/td>\n0.9<\/td>\n1.0<\/td>\n<\/tr>\n
25<\/td>\n4.10<\/td>\n7.90<\/td>\n12.10<\/td>\n16.50<\/td>\n20.40<\/td>\n29.60<\/td>\n42.20<\/td>\n61.00<\/td>\n81.50<\/td>\n103.00<\/td>\n30.9<\/td>\n<\/tr>\n
40
\nC=16<\/td>\n		2.12<\/td>\n6.06<\/td>\n10.00<\/td>\n14.31<\/td>\n18.75<\/td>\n24.75<\/td>\n34.50<\/td>\n51.06<\/td>\n73.75<\/td>\n96.88<\/td>\n45.3<\/td>\n<\/tr>\n
60
\nC=25<\/td>\n		6.54<\/td>\n9.12<\/td>\n11.76<\/td>\n14.84<\/td>\n20.24<\/td>\n28.16<\/td>\n38.60<\/td>\n56.00<\/td>\n78.00<\/td>\n99.20<\/td>\n21.3<\/td>\n<\/tr>\n
50<\/td>\n3.10<\/td>\n6.45<\/td>\n9.90<\/td>\n15.05<\/td>\n22.48<\/td>\n32.50<\/td>\n46.50<\/td>\n67.50<\/td>\n90.50<\/td>\n97.75<\/td>\n45.2<\/td>\n<\/tr>\n
65<\/td>\n3.25<\/td>\n6.83<\/td>\n10.24<\/td>\n14.63<\/td>\n20.63<\/td>\n27.46<\/td>\n40.32<\/td>\n58.73<\/td>\n86.35<\/td>\n107.94<\/td>\n41.2<\/td>\n<\/tr>\n
80<\/td>\n4.20<\/td>\n7.67<\/td>\n11.10<\/td>\n14.97<\/td>\n21.05<\/td>\n29.70<\/td>\n40.60<\/td>\n60.50<\/td>\n80.10<\/td>\n92.60<\/td>\n29.9<\/td>\n<\/tr>\n
100<\/td>\n3.57<\/td>\n7.37<\/td>\n11.03<\/td>\n15.21<\/td>\n21.80<\/td>\n30.39<\/td>\n44.13<\/td>\n64.90<\/td>\n82.06<\/td>\n93.23<\/td>\n34.9<\/td>\n<\/tr>\n
125
\nC=250<\/td>\n		3.69<\/td>\n7.00<\/td>\n10.80<\/td>\n15.24<\/td>\n21.20<\/td>\n29.80<\/td>\n41.60<\/td>\n59.60<\/td>\n87.60<\/td>\n102.80<\/td>\n36.9<\/td>\n<\/tr>\n
125
\nC=370<\/td>\n		3.34<\/td>\n7.14<\/td>\n10.84<\/td>\n15.19<\/td>\n21.89<\/td>\n31.62<\/td>\n45.95<\/td>\n65.41<\/td>\n82.43<\/td>\n93.24<\/td>\n37.5<\/td>\n<\/tr>\n
200<\/td>\n3.17<\/td>\n6.90<\/td>\n10.79<\/td>\n15.66<\/td>\n22.41<\/td>\n31.90<\/td>\n42.76<\/td>\n60.34<\/td>\n81.21<\/td>\n96.03<\/td>\n37.8<\/td>\n<\/tr>\n
300<\/td>\n3.31<\/td>\n6.92<\/td>\n10.54<\/td>\n14.54<\/td>\n20.23<\/td>\n28.62<\/td>\n43.85<\/td>\n64.23<\/td>\n82.31<\/td>\n94.08<\/td>\n38.3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u8868 4 Fisher \u516c\u53f8 ED \u578b\u5957\u7b80\u9600\u6d41\u91cf\u7cfb\u6570 \u0424 \u503c\u53ca R \u8ba1\u7b97\u503c<\/caption>\n
\u516c\u79f0\u901a\u5f84 DN\u00d7dN<\/td>\n\u5404\u76f8\u5bf9\u5f00\u5ea6 \u0424 \u503c<\/td>\n\u53ef\u8c03\u6bd4 R<\/td>\n<\/tr>\n
0.1<\/td>\n0.2<\/td>\n0.3<\/td>\n0.4<\/td>\n0.5<\/td>\n0.6<\/td>\n0.7<\/td>\n0.8<\/td>\n0.9<\/td>\n1.0<\/td>\n<\/tr>\n
\n

1*1\/4\u00d71*5\/16<\/p>\n<\/td>\n

0.783<\/td>\n1.54<\/td>\n2.20<\/td>\n2.89<\/td>\n4.21<\/td>\n5.76<\/td>\n7.83<\/td>\n10.9<\/td>\n14.1<\/td>\n17.2<\/td>\n27.4<\/td>\n<\/tr>\n
1*1\/2\u00d71*7\/8<\/td>\n1.52<\/td>\n2.63<\/td>\n3.87<\/td>\n5.41<\/td>\n7.45<\/td>\n11.2<\/td>\n17.4<\/td>\n24.5<\/td>\n30.8<\/td>\n35.8<\/td>\n36.3<\/td>\n<\/tr>\n
2\u00d72*5\/16<\/td>\n1.66<\/td>\n2.93<\/td>\n4.66<\/td>\n6.98<\/td>\n10.8<\/td>\n16.5<\/td>\n25.4<\/td>\n37.3<\/td>\n50.7<\/td>\n59.7<\/td>\n57.6<\/td>\n<\/tr>\n
2*1\/2\u00d72*7\/8<\/td>\n3.43<\/td>\n7.13<\/td>\n10.8<\/td>\n15.1<\/td>\n22.4<\/td>\n33.7<\/td>\n49.2<\/td>\n71.1<\/td>\n89.5<\/td>\n99.4<\/td>\n41.3<\/td>\n<\/tr>\n
3\u00d73*7\/16<\/td>\n4.32<\/td>\n7.53<\/td>\n10.9<\/td>\n17.1<\/td>\n27.2<\/td>\n43.5<\/td>\n66.0<\/td>\n97.0<\/td>\n120<\/td>\n136<\/td>\n54.2<\/td>\n<\/tr>\n
4\u00d74*3\/8<\/td>\n5.85<\/td>\n11.6<\/td>\n18.3<\/td>\n30.2<\/td>\n49.7<\/td>\n79.7<\/td>\n125<\/td>\n171<\/td>\n205<\/td>\n224<\/td>\n64.8<\/td>\n<\/tr>\n
6\u00d77<\/td>\n12.9<\/td>\n25.8<\/td>\n43.3<\/td>\n67.4<\/td>\n104<\/td>\n162<\/td>\n239<\/td>\n316<\/td>\n368<\/td>\n394<\/td>\n47.1<\/td>\n<\/tr>\n
8\u00d78L=2<\/td>\n18.5<\/td>\n38.0<\/td>\n58.4<\/td>\n86.7<\/td>\n130<\/td>\n189<\/td>\n268<\/td>\n371<\/td>\n476<\/td>\n567<\/td>\n41.9<\/td>\n<\/tr>\n
8\u00d78L=3<\/td>\n27.0<\/td>\n58.1<\/td>\n105<\/td>\n188<\/td>\n307<\/td>\n478<\/td>\n605<\/td>\n695<\/td>\n761<\/td>\n818<\/td>\n43.1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u6bd4\u8f83\u8868 2\u3001\u8868 3 \u8fd9\u4e24\u4e2a\u7cfb\u5217\u8c03\u8282\u9600\u7684 R \u503c\u53ef\u4ee5\u770b\u51fa\uff0c\u53cc\u5ea7\u8c03\u8282\u9600\u5404\u79cd\u89c4\u683c\u7684 R \u503c\u504f\u5dee\u8f83\u5927\uff0c\u5957\u7b52\u8c03\u8282\u9600\u5404\u79cd\u89c4\u683c\u7684 R \u503c\u504f\u5dee\u8f83\u5c0f\u3002\u8fd9\u4e0e\u4e24\u79cd\u9600\u8bbe\u8ba1\u65f6\u5bf9\u6d41\u91cf\u7279\u6027\u91c7\u7528\u4e0d\u540c\u8bef\u5dee\u5224\u5b9a\u6807\u51c6\u76f8\u543b\u5408\uff0c\u53cc\u5ea7\u8c03\u8282\u9600\u4ee5\u6700\u5927\u6d41\u91cf\u503c\u7684 10% \u4f5c\u4e3a\u6bcf\u4e2a\u884c\u7a0b\u6d41\u91cf\u503c\u7684\u504f\u5dee\u8303\u56f4\uff0c\u800c\u5957\u7b52\u9600\u91c7\u7528\u56fd\u9645 IEC \u6807\u51c6\u4e2d\u7684\u659c\u7387\u6cd5\u8ba1\u7b97\u6d41\u91cf\u7279\u6027\u504f\u5dee\u7684\u65b9\u6cd5\u3002\u663e\u7136\uff0c\u540e\u4e00\u79cd\u65b9\u6cd5\u8f83\u524d\u4e00\u79cd\u65b9\u6cd5\u66f4\u80fd\u4fdd\u8bc1 R \u503c\u8fbe\u5230\u8bbe\u8ba1\u8981\u6c42\uff0c\u8fd9\u4e5f\u8bf4\u660e\u4e86 IEC \u6807\u51c6\u659c\u7387\u6cd5\u7684\u5148\u8fdb\u6027\u3002<\/p>\n

\u6bd4\u8f83\u8868 2\u3001\u8868 3\u3001\u8868 4 \u8fd8\u53ef\u4ee5\u770b\u51fa\uff0c\u56fd\u4ea7\u8c03\u8282\u9600\u7684 R \u503c\u6bd4\u56fd\u5916\u8c03\u8282\u9600\u5c0f\uff0c\u56fd\u5185\u53cc\u5ea7\u9600\"R\u7684\u5e73\u5747\u503c\"=30.5\u3001\u5957\u7b80\u9600\"R\u7684\u5e73\u5747\u503c\"=36.2\uff1bFisher \u516c\u53f8 ED \u578b\u5957\u7b80\u9600\"R\u7684\u5e73\u5747\u503c\"=45.9\u3002<\/p>\n

\u518d\u6309\u5f0f\uff0810\uff09\u8ba1\u7b97\u56fd\u5185\u5957\u7b80\u9600\u548c Fisher \u516c\u53f8 ED \u578b\u5957\u7b80\u9600\u5728\u5de5\u4f5c\u884c\u7a0b\u6bb5\uff08h=0.2~0.8\uff09\u65f6\u7684 R \u503c\uff0c\u5e76\u4e0e\u5168\u884c\u7a0b\u65f6\u7684 R \u503c\u76f8\u6bd4\u8f83\uff0c\u7ed3\u679c\u89c1\u8868 5 \u4e0e\u8868 6\u3002\u53ef\u4ee5\u770b\u51fa\uff0c\u56fd\u4ea7\u5957\u7b80\u9600\u5de5\u4f5c\u884c\u7a0b\u6bb5\u7684 R \u503c\u548c\u5168\u884c\u7a0b R \u503c\u63a5\u8fd1\uff0c\u65e0\u663e\u8457\u6539\u53d8\uff0c\"R\u7684\u5e73\u5747\u503c\"=34.2\uff0c\u800c Fisher \u516c\u53f8\u5957\u7b80\u9600\u5728\u5de5\u4f5c\u884c\u7a0b\u6bb5\u7684 R \u503c\u660e\u663e\u9ad8\u4e8e\u5168\u884c\u7a0b\u7684 R \u503c\uff0c\"R\u7684\u5e73\u5747\u503c\"=60.5\u3002<\/p>\n

\u63d0\u9ad8\u5de5\u4f5c\u884c\u7a0b\u6bb5\u7684 R \u503c\uff0c\u5176\u4f18\u8d8a\u6027\u5728\u4e8e\u5b83\u80fd\u66f4\u597d\u5730\u6ee1\u8db3\u81ea\u63a7\u7cfb\u7edf\u7684\u9700\u8981\uff0c\u8fd8\u80fd\u63d0\u9ad8 80% \u5f00\u5ea6\u65f6\u7684\u6d41\u91cf\u7cfb\u6570\u503c\uff0c\u4ece\u800c\u4f7f\u5168\u5f00\u65f6\u9600\u7684\u6d41\u901a\u80fd\u529b\u6709\u8f83\u663e\u8457\u7684\u63d0\u9ad8\u3002\u901a\u8fc7\u5bf9 R \u503c\u7684\u5206\u6790\u6bd4\u8f83\uff0c\u8bf4\u660e\u4e86\u56fd\u5185\u5916\u8c03\u8282\u9600\u5728\u8bbe\u8ba1\u6c34\u5e73\u4e0a\u5b58\u5728\u4e00\u5b9a\u7684\u5dee\u8ddd\u3002<\/p>\n\n\n\n\n\n\n
\u8868 5 \u56fd\u4ea7\u5957\u7b52\u8c03\u8282\u9600 R \u503c<\/caption>\n
\u5957\u7b52\u9600\u884c\u7a0b\u6bb5<\/td>\n\u5957\u7b52\u9600\u5404\u89c4\u683c R \u503c<\/td>\nR \u5e73\u5747<\/td>\n<\/tr>\n
20<\/td>\n40
\nC=16<\/td>\n		40
\nC=25<\/td>\n		50<\/td>\n65<\/td>\n80<\/td>\n100<\/td>\n125
\nC=250<\/td>\n		125
\nC=370<\/td>\n		200<\/td>\n300<\/td>\n<\/tr>\n
\u5168\u884c\u7a0b<\/td>\n30.9<\/td>\n45.3<\/td>\n21.3<\/td>\n45.2<\/td>\n41.2<\/td>\n29.9<\/td>\n34.9<\/td>\n36.9<\/td>\n37.5<\/td>\n37.8<\/td>\n38.3<\/td>\n36.2<\/td>\n<\/tr>\n
h=0.2~0.8<\/td>\n26.9<\/td>\n28.9<\/td>\n20.5<\/td>\n49.2<\/td>\n33.4<\/td>\n29.5<\/td>\n35.4<\/td>\n33.0<\/td>\n39.2<\/td>\n35.2<\/td>\n38.4<\/td>\n34.2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n
\u8868 6 Fisher \u516c\u53f8\u5957\u7b52\u9600 R \u503c<\/caption>\n
\u5957\u7b52\u9600\u884c\u7a0b\u6bb5<\/td>\n\u5957\u7b52\u9600\u5404\u89c4\u683c R \u503c<\/td>\nR \u5e73\u5747<\/td>\n<\/tr>\n
1*1\/4\u00d71*5\/1<\/td>\n1*1\/2\u00d71*7\/8<\/td>\n2\u00d72*5\/16<\/td>\n2*1\/2\u00d72*7\/8<\/td>\n3\u00d73*7\/16<\/td>\n4\u00d74*3\/8<\/td>\n6\u00d77<\/td>\n8\u00d78L=2<\/td>\n8\u00d78L=3<\/td>\n<\/tr>\n
\u5168\u884c\u7a0b<\/td>\n27.4<\/td>\n35.3<\/td>\n57.6<\/td>\n41.3<\/td>\n54.2<\/td>\n64.8<\/td>\n67.1<\/td>\n41.9<\/td>\n43.1<\/td>\n45.9<\/td>\n<\/tr>\n
h=0.2~0.8<\/td>\n25.8<\/td>\n41.5<\/td>\n69.7<\/td>\n46.2<\/td>\n78.1<\/td>\n99.7<\/td>\n69.0<\/td>\n45.0<\/td>\n69.7<\/td>\n60.5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

4\u3001\u5bf9 IEC 534\u20142\u20144\uff08\u8349\u6848\uff09\u7684\u7406\u89e3<\/p>\n

IEC 534\u20142\u20144\uff08\u8349\u6848\uff09\u7b2c 3.3 \u6b3e\u5bf9\u7b49\u767e\u5206\u6bd4\u6d41\u91cf\u7279\u6027\u505a\u4e86\u5982\u4e0b\u89c4\u5b9a\uff1a<\/p>\n

\u201c\u5728 h=0.2 \u548c h=0.8 \u4e4b\u95f4\uff0c\u4efb\u610f\u4e24\u4e2a\u76f8\u90bb\u6d41\u91cf\u7cfb\u6570\u53d1\u8868\u503c\u7684\u5bf9\u6570\u4e4b\u95f4\u7684\u5dee\u503c\u5e94\u5728 0.13 \u548c 0.2 \u8303\u56f4\u5185\u201d\u3002\u201c\u4f4e\u4e8e h=0.2 \u8fd9\u4e24\u4e2a\u503c\u76f8\u5e94\u4e3a 0.13 \u548c 0.25\uff1b\u9ad8\u4e8e h=0.8\uff0c\u6b64\u503c\u5e94\u76f8\u5e94\u4e3a 0.03 \u548c 0.2\u201d\u3002<\/p>\n

\u8fd9\u91cc\u4f5c\u4e3a\u6d41\u91cf\u7279\u6027\u504f\u5dee\u8303\u56f4\u7684\u9009\u53d6\uff0c\u5e94\u5f53\u770b\u4f5c\u662f\u6309 R \u503c\u7684\u53d8\u5316\u8303\u56f4\u51b3\u5b9a\u7684\uff0c\u8bd5\u8ba1\u7b97<\/p>\n

R=20\uff0c0.1\u00d7logR=0.13
\nR=100\uff0c0.1\u00d7logR=0.20
\nR=300\uff0c0.1\u00d7logR=0.25
\nR=2\uff0c0.1\u00d7logR=0.03<\/p>\n

\u4e5f\u5c31\u662f\u8bf4\uff0c\u6d41\u91cf\u7279\u6027\u504f\u5dee\u5b9e\u9645\u4e0a\u662f\u5206\u6bb5\u9650\u5236 R \u503c\u7684\u53d8\u5316\u8303\u56f4\uff0c\u5373<\/p>\n

h=0.2~0.8\uff0cR=20~80\uff1b
\nh=0.8~1.0\uff0cR=2~100\uff1b
\nh=0~0.2\uff0cR=20~300\uff1b<\/p>\n

IEC \u7684\u8fd9\u4e00\u89c4\u5b9a\u6b63\u662f\u4f53\u73b0\u4e86\u5c06 R \u503c\u4f5c\u4e3a\u6d41\u91cf\u7279\u6027\u66f2\u7ebf\u7684\u4e00\u4e2a\u7279\u5f81\u53c2\u6570\uff0c\u5e76\u5b9e\u73b0\u4e86\u5728\u5168\u884c\u7a0b\u8303\u56f4\u5185\u53ef\u4ee5\u53d6\u4e0d\u540c R \u503c\u8fd9\u4e00\u8bbe\u8ba1\u601d\u60f3\u3002\u800c\u56fd\u6807 GB 4213\u201484\u300a\u6c14\u52a8\u8c03\u8282\u9600\u901a\u7528\u6280\u672f\u6761\u4ef6\u300b\u5728\u8fd9\u4e2a\u95ee\u9898\u4e0a\u662f\u548c IEC \u6807\u51c6\u5b58\u5728\u4e00\u5b9a\u5dee\u5f02\u7684\u3002\u6df1\u5165\u8ba8\u8bba R \u503c\u53ca\u6d41\u91cf\u7cfb\u6570\u7684\u5173\u7cfb\uff0c\u65e0\u8bba\u5bf9\u8bbe\u8ba1\u3001\u5236\u9020\u3001\u5e94\u7528\u8c03\u8282\u9600\u90fd\u6709\u4e00\u5b9a\u7684\u610f\u4e49\uff0c\u5bf9\u52a0\u5f3a\u8c03\u8282\u9600\u7684\u57fa\u7840\u7406\u8bba\u7814\u7a76\uff0c\u63d0\u9ad8\u6211\u56fd\u8c03\u8282\u9600\u8bbe\u8ba1\u5236\u9020\u6c34\u5e73\uff0c\u90fd\u662f\u5341\u5206\u5fc5\u8981\u7684\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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