阻尼振动与受迫振动实验论文(2)

1 b?Sb?6??Dj?D?2?6?1??1.457850935?10?3?1.5?10?3

b?b?(?9.1?72 100.?15?)b2???0.01459295 224??b??4?2?d?????b??S?0.0163542032b22??db??4??b?2??2.386561?10?4?2.4?10?4????(145.3?2.4)?10?4?1??b?0.05938158 Td

?Td?1.54425sTd?1.54425?10?0.001?0.0010154425?0.0010?5

Td?Td?(1.5443?0.0010)s

?0?2?Td1??2?4.069195rad/s

??0??T?????4??d?????6.47543?10??2?0??Td??1??

22????0?2.634977?10?3?2.6?10?3?0????(4.0692?0.0026)rad/s0???????1??????0??0.016363 ???16.83244s ??????0???0???0.2754?280.28??22????(16.83?0.28)s

????????0.016354201Q??34.26312 Q ???2??Q?0.560?30.6Q?Q?Q2?34.3?0.7

阻尼档位__3_____ 阻尼档位3

序号 θj 1 125 1.541 2 103 1.544 3 084 1.544 4 069 1.546 5 057 1.547 6 046 1.547 7 038 1.548 8 031 1.547 9 025 1.548 10 021 1.547 11 017 1.547 12 013 1.547 Td 16b?2??ln?i?6?ln?i???0.1352396976i?11b?Sb?6??Dj?D?2?6?1??3.014538?10?3?3.0?10?3

b?b?(?13.5?0.30)?10?2

b2???0.02151908

4?2?b2??4?2?d?????b??Sb?0.02228001192232?db???4??b?2??4.794453579?10?4?4.8?10?4????(215.2?4.8)?10?4?3??b?0.0874726385 Td

?Td?1.54608sTd?1.54425?10?0.001?0.0010154608?0.0010?5

Td?Td?(1.5461?0.0010)s

?0?2?Td1??2?4.06488706rad/s

??0??Td?????4?????????6.4679707?102?0??Td??1??

22????0?2.634977?10?3?2.6?10?3?0????(4.0649?0.0026)rad/s0???????0???1??160??0.0222997??? ???11.4321463s ??????0???0???0.254933?6150.2522????(11.43?0.25)s

????????0.021519081Q??23.2351941 Q ???2??Q?0.5000000?0070.5Q?Q?Q2?23.2?0.5

3、测定受迫振动的幅频特性和相频特性曲线 (注：阻尼档位与2中一致)

阻尼档位____1___ 序号 1 2 3 4 5 6 7 8 9 10 11 12 13 T(s) 1.379 1.393 1.412 1.434 1.463 1.492 1.504 1.521 1.535 1.544 1.558 1.575 1.608 ?2???0T?0 θm 17 19 22 27 38 54 74 115 139 158 127 90 54 φ1(?) 169.0 168.8 168.5 167.2 164.0 157.5 153.0 133.0 104.0 82.0 53.0 42.5 20.5 φ2(?) 174.0 173.7 173.0 170.2 166.0 159.5 155.0 134.0 105.0 84.0 55.0 43.5 21.5 ? 171.5 171.7 170.8 168.7 165.0 158.5 154.0 133.5 104.5 83.0 54.0 43.0 21.0 φ理论 172.8 171.9 169.9 168.0 164.0 156.2 150.3 135.5 111.9 90.2 58.2 36.7 18.8 |（?-φ理论)/φ理论| 0.8% 0.3% 0.5% 0.4% 0.6% 1.4% 2.4% 1.4% 6.6% 7.9% 7.2% 18.0% 11.7% 1.11971398 1.10846057 1.09354503 1.07676818 1.05542418 1.03490990 1.02665264 1.01517790 1.00591894 1.00005543 0.99106905 0.98099465 0.95965542 14 15 1.648 1.693

0.93694513 0.91204110 36 26 13.0 8.0 15.0 10.6 14.0 9.3 11.9 8.2 19.3% 13.4% 阻尼档位___3____ 序号 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 T(s) 1.388 1.426 1.469 1.496 1.510 1.523 1.537 1.541 1.542 1.547 1.551 1.558 1.565 1.584 1.607 ?2???0T?0 θm 18 23 35 48 56 65 71 72 73 74 73 72 70 60 48 φ1(?) 160.0 156.0 148.0 136.5 127.0 115.5 100.2 95.1 93.0 88.0 83.5 75.5 68.5 47.5 33.4 φ2(?) 164.0 159.2 150.0 138.5 128.5 116.5 101.0 96.7 94.3 89.5 84.5 76.5 70.0 49.5 35.2 ? 162.0 157.6 149.0 137.5 127.8 116.0 101.0 95.9 93.65 88.75 84.0 76.0 69.25 48.5 34.3 φ理论 165.1 157.1 146.7 137.4 124.5 104.7 98.1 96.4 94.0 87.8 81.0 69.8 60.1 41.38 29.0 |（?-φ理论)/φ理论| 0.011% 0.32% 0.011% 0.073% 0.021% 0.10% 3.0% 0.52% 0.37% 1.1% 3.7% 8.9% 15.2% 16.9% 18.3% 1.11363257 1.08395652 1.05222737 1.03323663 1.02365695 1.01491924 1.00567469 1.00306424 1.00241375 0.99917389 0.99659703 0.99211938 0.98768179 0.97586616 0.96186808 16 17 0.93569734 0.90927761.700 5 六、图像拟合 1.652 34 25 19.0 16.0 21.0 13.0 20.0 14.5 17.9 12.7 11.78% 14.17% B1 Logistpk of B1180120B16000.91.01.1A1

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