导线应力弧垂计算

8. 操作过电压

E?2l2E?1l2 ?02-??01???E(t2?t1) 2224?0224?01 带入数据得：

2276000?（34.65?10-3）?l276000?（34.06?10-3）?l2?02-?70.5??1.4364?(15-15) 2224?70.524?0222即：?02?（0.00074l2?70.5）?02?3.80l2?0 当档距为以下各值时，由状态方程求得应力：

50m:?02?（0.00074?502?70.5）?02?3.80?502?0

3232?02?70.56(Mpa)

32100m:?02?（0.00074?1002?70.5）?02?3.80?1002?0

?02?70.71(Mpa)

32150m:?02?（0.00074?1502?70.5）?02?3.80?1502?0

?02?70.87(Mpa)

32200m:?02?（0.00074?2002?70.5）?02?3.80?2002?0

?02?71.03(Mpa)

32250m:?02?（0.00074?2502?70.5）?02?3.80?2502?0

?02?71.56(Mpa)

32300m:?02?（0.00074?3002?70.5）?02?3.80?3002?0

?02?71.26(Mpa)

32350m:?02?（0.00074?3502?70.5）?02?3.80?3502?0

?02?71.33(Mpa)

32400m:?02?（0.00074?4002?70.5）?02?3.80?4002?0

?02?71.39(Mpa)

450m:?02?（0.00074?4502?70.5）?02?3.80?4502?0

32?02?71.44(Mpa)

32500m:?02?（0.00074?5002?70.5）?02?3.80?5002?0

?02?71.47(Mpa)

表七 LGJ-300/50型导线应力计算表 最高气温最低气温最大风速档距（m） (Mpa) (Mpa) (Mpa) 50 38.86 105.39 98.81 100 45.20 102.50 97.78 150 50.44 98.30 96.40 200 54.49 93.58 94.97 250 57.58 88.82 93.68 300 59.95 85.06 92.69 350 61.78 82.23 91.83 400 63.21 79.80 91.09 450 64.33 78.02 90.51 500 65.24 76.75 90.15 续表 外过有风外过无风档距（m） 安装(Mpa) (Mpa) (Mpa) 50 98.31 71.45 70.5 100 95.86 73.78 70.5 150 92.38 76.08 70.5 200 88.60 78.16 70.5 250 85.12 80.05 70.5 300 82.24 81.23 70.5 350 79.98 82.59 70.5 400 78.26 83.46 70.5 450 76.94 84.17 70.5 500 75.93 85.72 70.5

覆冰无风(Mpa) 99.08 98.78 98.38 97.98 97.43 97.32 97.02 96.88 96.73 96.61 年均温(Mpa) 70.50 70.50 70.50 70.50 70.50 70.50 70.50 70.50 70.50 70.50 操作过电压(Mpa) 70.56 70.71 70.87 71.03 71.56 71.26 71.33 71.39 71.44 71.47 六、计算弧垂

?l2弧垂计算公式：f?

8?0b

1.最高温：

34.06?10-3?502?0.274(m) 50m:f?8?38.86

34.06?10-3?1002?0.912(m) 100m:f?8?45.20

34.06?10-3?1502?1.90(m) 150m:f?8?50.44

34.06?10-3?2002?3.13(m) 200m:f?8?54.49

34.06?10-3?2502?4.62(m) 250m:f?8?57.58

34.06?10-3?3002?6.39(m) 300m:f?8?59.95

34.06?10-3?3502?8.44(m) 350m:f?8?61.78

34.06?10-3?4002?10.78(m) 400m:f?8?63.21

34.06?10-3?4502?13.40(m) 450m:f?8?64.33

34.06?10-3?5002?16.31(m) 500m:f?8?65.242.外过无风：

34.06?10-3?502?0.14(m) 50m:f?8?70.5

34.06?10-3?1002?0.55(m) 100m:f?8?70.5

34.06?10-3?1502?1.24(m) 150m:f?8?70.534.06?10-3?2002?2.20(m) 200m:f?8?70.5

34.06?10-3?2502?3.44(m) 250m:f?8?70.5

34.06?10-3?3002?4.96(m) 300m:f?8?70.5

34.06?10-3?3502?6.75(m) 350m:f?8?70.5

34.06?10-3?4002?8.82(m) 400m:f?8?70.5

34.06?10-3?4502?11.16(m) 450m:f?8?70.5

34.06?10-3?5002?13.78(m) 500m:f?8?70.53.覆冰无风：

34.06?10-3?502?0.11(m) 50m:f?8?99.08

34.06?10-3?1002?0.43(m) 100m:f?8?98.78