根据舰船机械设备安装特性及隔振要求,建立包含机械设备、隔振器和柔性基础的数学模型并对其求解,得到隔振系统在简谐激励下的响应及传递功率流计算公式,讨论了隔振系统中设备质量、隔振器刚度和阻尼、柔性基础刚度和阻尼等参数对隔振能力的影响。理论表明,适当增大机械设备质量、隔振器阻尼及柔性基础阻尼能提高系统隔振能力,较大的隔振器刚度不利于隔振,而基础板柔性对隔振系统的影响与激励频率有关,并给出了柔性基础隔振设计中参数选取的一般规律。
According to the installation standards and vibration isolation requirements of ship equipments, a mathematical model of vibration isolation system consisting of equipment, isolator and flexible foundation is developed and solved, and the response and power flow formula of the system under harmonic excitation are worked out. The effects that equipment mass, isolator stiffness and damping as well as flexible foundation stiffness and damping have on the performance of the isolation system is discussed. As theoretical results show, it enhances the performance of the system to properly increase equipment mass, isolator damping or flexible foundation damping; larger isolator stiffness is not beneficial to vibration isolation; the effect of flexible foundation stiffness is related to excitation frequency. General principles of the design of vibration isolation based on flexible foundation is put forward.
2016,38(6): 70-74 收稿日期：2015-11-16
DOI：10.3404/j.issn.1672-7619.2016.06.014
分类号：TB535+.1
基金项目：国家自然科学基金资助项目(51109131)
作者简介：黄伍德(1993-),男,硕士研究生,研究方向为结构减振降噪。
参考文献：
[1] 孙玲玲, 宋孔杰. 柴油机多支承隔振系统的功率流特性[J]. 内燃机学报, 2003, 21(4):249-252. SUN Ling-ling, SONG Kong-jie. Power flow characteristics of flexible isolation system with multiple mountings[J]. Transactions of CSICE, 2003, 21(4):249-252.
[2] 关珊珊, 陈美霞, 陈乐佳, 等. 基于有限元动力计算的浮筏隔振系统功率流研究[J]. 舰船科学技术, 2007, 29(5):132-135. GUAN Shan-shan, CHEN Mei-xia, CHEN Le-jia, et al. Investigation of power flow in a floating raft isolating system based on finite element dynamic analysis[J]. Ship Science and Technology, 2007, 29(5):132-135.
[3] XIONG Y P, XING J T, PRICE W G. Interactive power flow characteristics of an integrated equipment-nonlinear isolator-travelling flexible ship excited by sea waves[J]. Journal of Sound and Vibration, 2005, 287(1/2):245-276.
[4] 邓海华. 整舱浮筏功率流测试初步分析研究[J]. 舰船科学技术, 2006, 28(S2):81-85. DENG Hai-hua. Research of power flow in the-whole-cabin-floating raft vibration isolation[J]. Ship Science and Technology, 2006, 28(S2):81-85.
[5] 童宗鹏, 章艺, 尚国清, 等. 舱筏隔振系统水下振动特性的理论分析与试验研究[J]. 振动与冲击, 2005, 24(6):71-74. TONG Zong-peng, ZHANG Yi, SHANG Guo-qing, et al. Theoretical and experimental research on the vibration of cabin with floating raft isolation system[J]. Journal of Vibration and Shock, 2005, 24(6):71-74.
[6] 程广利, 伍先俊, 朱石坚, 等. 船舶的不同基础状态对隔振效率的影响[J]. 舰船科学技术, 2005, 27(1):21-23. CHENG Guang-li, WU Xian-jun, ZHU Shi-jian, et al. The influences on vibration insulation efficiency for ship under some base situations[J]. Ship Science and Technology, 2005, 27(1):21-23.
[7] 李玉龙, 白鸿柏, 何忠波, 等. 柔性基础上金属橡胶非线性隔振系统性能分析[J]. 机械科学与技术, 2015, 34(1):42-46. LI Yu-long, BAI Hong-bai, HE Zhong-bo, et al. Study on the performance of nonlinear metal-rubber isolation system on flexible base[J]. Mechanical Science and Technology for Aerospace Engineering, 2015, 34(1):42-46.
[8] 行晓亮, 王敏庆, 宋代科. 弹性基础浮筏的导纳功率流研究[J]. 机械科学与技术, 2005, 24(7):761-763. XING Xiao-liang, WANG Min-qing, SONG Dai-ke. Study on vibration characteristic of flexible-basement floating raft vibration-isolation system[J]. Mechanical Science and Technology, 2005, 24(7):761-763.
[9] 朱石坚, 何琳. 船舶机械振动控制[M]. 北京:国防工业出版社, 2006. ZHU Shi-jian, HE Ling. Vibration control of onboard machinery[M]. Beijing:National Defense Industry Press, 2006.
[10] 杜功焕, 朱哲民, 龚秀芬. 声学基础[M]. 3版. 南京:南京大学出版社, 2012. DU Gong-huan, ZHU Zhe-min, GONG Xiu-fen. Fundamentals of acoustics[M]. 3rd ed. Nanjing:Nanjing University Press, 2012.
