2015 2 34 2 Mechanical Science and Technology for Aerospace Engineering February Vol.34 2015 No.2 DOI 10.13433 /j.cnki.1003-8728.2015.0203 6 KW 王金林 1, 徐利梅 1, 张鸿 2, 谢晓梅 1 1, 姜盼秋 1 611731 2 201700 以额定转速为 2 400 r /min, 额定功率 6 KW 柴油发电机组为试验样机, 对带有橡胶隔振器的机 组振动性能进行研究采用有限元法得到了机组的固有特性和振动响应, 分析了隔振器参数变化对 机组振动性能的影响结果表明 : 隔振器橡胶杨氏模量和阻尼系数增大到一定数值后, 对机组的振动 起到良好的抑制作用, 隔振器两端的振动差距部分缩小, 其它呈增大趋势 柴油发电机组 ; 振动 ; 隔振器 ; 有限元 O32 A 1003-8728 2015 02-0173-06 Finite Elements Analysis on Vibration Performances of 6 KW Diesel Generator Set Wang Jinlin 1 Xu Limei 1 Zhang Hong 2 Xie Xiaomei 1 Jiang Panqiu 1 1 Institute of Astronautics & Aeronautic University of Electronics Science and Technology of China Chengdu 611731 2 Shanghai Cooltech Power CO. LTD Shanghai 201700 Abstract Vibration properties of diesel generator set with a rubber isolator were investigated which has a power of 6 KW and rated speed of 2 400 r / min. Inherent characteristics and dynamic response of the units have been acquired by finite element method FEM. The influence of different parameters of isolator on vibration properties of diesel generator set was analyzed. The results show that when the Young's modulus and damping coefficient of the rubber isolator increase to a certain value vibration amplitudes of the units are inhibited well. Except this vibration gap at both ends of isolator is narrowed in part and the other trends to increase. Key words acceleration computer simulation computer software damping diesel generator set finite element method isolator mesh generation modal analysis schematic diagrams velocity vibration analysis vibrations mechanical CAMEO 凯模 CAE 库案例 3-5 finite 3 element method FEM 1-2 6-8 9-10 2 400 r /min 6 KW 2013-07-05 1987- wangjinlin23@ 126. com xulimei@ uestc.edu.cn
174 34 1 2 1 1 3 1 GB 6 KW 1 13 4 4 /mm /kg 3 4 5 1830 731 200 100 340 185 20 316 335 443 57 150 370 420 12. 5 690 500 805 10 320 535 462 40 4 1 2a 4 2 2b 2 GB02820-9 11 3a XZ 3b 6 7 8 9 a 3 7 GB C 6 KW 0. 8 mm 50 mm /s 31 m 2 2 XZ u rms a rms v rms 11 u rms = 0. 0159 v rms 1 a rms = 0. 628 v rms 2
2 6 KW 175 2 X Z 3 Q235 X Z / / / / /mm mm s -1 m s -2 /mm mm s -1 m s -2 1 0. 027 3. 9 5. 1 0. 06 3. 7 4. 9 5 2 0. 024 3. 5 3. 8 0. 03 5. 0 5. 5 3 1. 000 59. 0 54. 6 0. 60 37. 2 28. 8 4 1. 030 59. 1 53. 4 0. 55 37. 2 29. 5 5 0. 080 3. 9 3. 2 0. 11 5. 2 4. 6 6 0. 081 3. 8 3. 3 0. 12 5. 2 4. 7 7 1. 050 60. 0 55. 5 0. 90 49. 6 36. 6 8 1. 09 61. 2 54. 9 0. 85 49. 0 36. 1 9 0. 078 3. 8 3. 1 0. 12 5. 2 4. 5 a 0. 079 3. 8 3. 2 0. 13 5. 3 4. 6 b 0. 702 35. 5 17. 5 0. 45 24. 3 26. 0 c 1. 200 65. 0 58. 4 0. 56 32. 0 18. 1 d 1. 100 62. 5 56 0. 536 36. 0 36. 1 2 GB GB X 3 4 7 8 c d6 5 3 4 7 8 GB shell63 c d 7 3 3 mm solid186 beam189 2. 5 mm 145 mm mass21 1 3 3.1 43237 74191 6 12-13 14 6 1 3 MPC 3 15 / /GPa kg m 3 1 Q235 212 0. 288 7860-2 148 0. 31 7200-3 70 0. 33 2700-4 0. 012 0. 3 1100 0. 1
176 34 16 3 7 c d GB 3.2 3 7 c d 2 G 1 G 3 3 5 7 9 15 4 3 5 7 9 c d 6 8 ~ 65 Hz 9a 9b 6 2 400 r /min 40 Hz X Z 9a 1 / 槡 2 槡 2 20 Hz 9 14 c d 7 3 4 8 4 25 Hz 24. 8 Hz 7a 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 /Hz 8 10 13 16 19 22 23 25 30 43 43 47 48 55 65 24. 8 Hz 20 Hz 25 Hz 20 Hz 7 9 7 8 9 8 17 9 N = 20lg u v a 3 u v a u v a u v 3.3 a 9b 30 Hz 9 3 5 8 X Z 7 9 Z 10 G 1 G 3 8 XZ 3 origin 10 G 1 G 3 1 000 N 0 G 1 G 3 5 Hz 10 15 Hz 0 25 Hz ~65 Hz 13 G 1 G 3
2 6 KW 177 4 Z 25 Hz G 1 0. 03 GPa 18. 6% G 3 0. 03GPa 18. 6% 3 M + Y C Y + K Y = F 4 25. 5% G 1 0. 03 GPa K C G Y 3 4.2 σ ε δ ΔJ 4.1 19 18 2π/ω 2π/ω σ ε ΔJ = σdε = σdε /dtdt = 2π/ω σ = E 0 3 ε - 1 + ε -2 5 0 ωε 2 0 Q'sin ωt cos ωt + Q cos 2 ωt dt = E 0 4ε 2 0 Q' /2 + πq /4 8 5 σ 0 ε 0 Q' = σ = E 0 3 3ε σ - 3ε 2 + 4ε 3-5ε 4 0 /ε 0 cosδ Q = σ 0 /ε 0 sinδ Q' 6 ε Q dσ dε = E 0( 1-2ε + 4ε 2-20 3 ε3 ) 7 E 0 E 0-2E 0 ε 0. 15 0. 2 0. 25 0. 015 0. 02 0. 03 0. 04 0. 06 0. 08 GPa 0. 3 0. 4 0. 6 0. 8 1 13 3 7 c d X 50 Hz 3 11 X 0. 25 13 X 30 ~ 55 Hz 3 7 c d 7 X 50 Hz 11 3 0. 03 GPa c d 7 c d 0. 03 GPa 0. 6 42. 3% 68. 2% 14 G 1 G 3 14 Z 23. 1% 51. 1% Z 25 Hz 12 Z 12 G 1 G 1 G 3 G 3 0 0
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