为什么应力提取每个节点存在多个应力值
我模型采用shell181单元分析，在后处理时为什么应力提取每个节点存在多个应力值？
NODE SX SY SZ SXY SYZ SXZ
10969 1.3807 0.11636E-01107.12 0.13136 -1.1164 -12.599
109690.65581E-06-0.67613 97.050 0.28457E-03 -15.021 -0.11959E-01
109690.11936E-051.1929 97.575 0.12863E-02 -15.687 -0.12328E-01
10969-1.3589 0.12006E-01110.43 0.12277 -1.1514 -11.664
116400.83368E-07 -2.6772 101.10 0.27183E-03 -14.362 0.59297E-02
11640-2.4239 0.12026E-01110.61 -0.11505 -1.1533 10.911
11640 2.3857 0.12666E-01116.38 -0.10238 -1.2141 9.8674
116400.39707E-063.0688 103.06 -0.10642E-02 -13.484 0.57734E-02
11749-1.6731 0.12095E-01110.74 -0.10167 -1.1573 9.6388
11749 1.6343 0.12664E-01115.83 -0.89060E-01 -1.2111 8.5552
11750 -0.38456 0.12234E-01110.93 -0.74287E-01 -1.1649 7.0434
117500.34970 0.12671E-01114.79 -0.62811E-01 -1.2060 5.9817
117510.53642 0.12355E-01110.97 -0.45852E-01 -1.1709 4.3597
11751 -0.56279 0.12683E-01113.84 -0.37290E-01 -1.2016 3.5113
11752 1.1972 0.12428E-01110.84 -0.16751E-01 -1.1737 1.6151
11752-1.2139 0.12674E-01113.01 -0.12383E-01 -1.1967 1.1366
11753 1.6734 0.12432E-01110.54 0.12515E-01 -1.1722 -1.1511
11753-1.6793 0.12628E-01112.28 0.12103E-01 -1.1908 -1.1704
11754 1.9957 0.12358E-01110.05 0.41288E-01 -1.1662 -3.8874
11754-1.9938 0.12540E-01111.68 0.36427E-01 -1.1834 -3.4493
11755 2.1495 0.12209E-01109.39 0.68942E-01 -1.1557 -6.5416
11755-2.1405 0.12412E-01111.19 0.60847E-01 -1.1748 -5.7405
11756 2.0742 0.12002E-01108.58 0.95067E-01 -1.1415 -9.0724
11756-2.0601 0.12255E-01110.81 0.85509E-01 -1.1653 -8.0741
11757 1.6746 0.11761E-01107.63 0.11954 -1.1250 -11.451
11757-1.6564 0.12089E-01110.54 0.11034 -1.1560 -10.459
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