船舶推进轴系引起的船体振动问题日益突出，为了减小推进轴系传递给船体的振动，从改变振动传递路径的角度提出一种轴系整体弹性支撑方案。建立有限元模型，改变支撑平台结构刚性和隔振器刚度分别计算轴承基座间相对位移和轴承载荷。所选取的平台方案中，在重力下轴承基座间最大相对位移为1.216 mm。推力作用下当推力大于500 kN时，采用1阶弯曲频率在18.2 Hz及以上的平台方案时，轴承基座间最大相对位移小于0.3 mm，隔振器刚度变化则对轴承载荷影响不大。通过调整平台刚度和隔振器刚度，可以将弹性支撑系统对轴系影响控制在标准范围内，保证轴系安全运行。
The hull vibration caused by ship propulsion shafting is becoming more and more serious.To reduce the vibration of the propulsion shafting to the hull,an overall elastic support scheme of shafting is proposed with changing the vibration transmission path.Establishing the finite element model calculate relative displacement of bearing pedestals and bearing load by changing the rigidity of supporting platform and vibration isolator.The maximum relative displacement is 1.216 mm under gravity in all selected platform schemes.When the thrust is greater than 500 kN under the action of thrust, The maximum relative displacement less than 0.3 mm in the platform scheme thats’ first order bending frequency greater than 18.2 Hz.The change in vibration isolator stiffness has no obvious diffierence on bearing load.The influence of elastic support system on shafting can be controlled within the standard range to ensure the safe operation of shafting by adjusting platform stiffness and vibration isolator stiffness.
2020,42(4): 81-84 收稿日期：2108-08-24
DOI：10.3404/j.issn.1672-7649.2020.04.016
分类号：U664.2
作者简介：张乐(1992-)，男，硕士研究生，研究方向为舰船动力装置振动噪声控制
参考文献：
[1] 施引, 朱石坚, 何琳. 舰船动力机械噪声及其控制[M]. 北京: 国防工业出版社, 1990. 106-120.
[2] GOODWIN A J H. The design of a resonance changer to overcome exccssive axial vibration of propeller shafting[J]. Institute of Marine Engineers—Transactions, 1960, 72: 37–63
[3] ANDERSON H G, RAJAN J R N, MORSE W H. Trunnion mounted marine thrust bearing/vibration reducer [P]. U.S. Patent: 3826544, 1974.
[4] Advanced submarine technology - project M control theory report [R]. U.S.Office of Naval Research, 1993.
[5] Advanced submarine technology - project M control experiments and simulations [R]. U.S. Office of Naval Research, 1994.
[6] 浆轴系统一体化低频降噪机理研究[R]. 武汉: 海军工程大学, 2017.
[7] 何江洋. 舰船推力轴承与动力设备整体隔振系统力学特性研究[D]. 武汉: 海军工程大学, 2012.
[8] 何江洋, 何琳, 帅长庚, 等. 船舶动力设备及推力轴承集成隔振系统设计[J]. 舰船科学技术, 2013, 35(1): 77–81
[9] 刘学斌, 徐伟, 何江洋. 舰船弹性支撑推力轴承抗冲击特性研究[J]. 船舶工程, 2016, 38(11): 58–61
[10] 中国船舶工业集团公司第七〇八研究所.GB/T 14364-2008, 船舶轴系滑动式中间轴承[S]. 上海: 中国船舶工业集团公司, 2008.
