论文部分内容阅读
推力轴承传递的螺旋桨动态激励力可激发船体结构振动,是舰船重要的机械噪声源。采取弹性支承方式可降低推力轴承引起的噪声,但在受冲击载荷作用时,弹性支承的变形会导致推力轴承与轴系之间产生相对位移,从而影响轴系运行安全。为分析弹性支承推力轴承的抗冲击性能,文章建立了推进轴系及弹性支撑推力轴承和主机耦合模型,采用仿真分析方法研究了推力轴承的冲击响应。分析结果表明,推力轴承的相对位移响应较大,近似等于最大许用位移值,通过改变隔振器刚度、支撑轴承刚度与位置等措施,可使推力轴承的相对位移响应满足舰船设备抗冲击要求,并改善轴系受力状态。
The dynamic excitation force of the propeller transmitted by the thrust bearing can stimulate the vibration of the hull structure and is an important mechanical noise source of the ship. The elastic support method can reduce the noise caused by the thrust bearing. However, under the impact load, the deformation of the elastic support will cause the relative displacement between the thrust bearing and the shaft system, thus affecting the shaft running safety. In order to analyze the impact resistance of the thrust bearing with elastic support, a coupled model of the thrust shaft and elastic support thrust bearing and the host was established. The impact response of the thrust bearing was studied by simulation analysis. The results show that the relative displacement response of the thrust bearing is larger and approximately equal to the maximum allowable displacement value. By changing the stiffness of the vibration isolator and supporting the rigidity and position of the bearing, the relative displacement response of the thrust bearing can meet the requirements of ship equipment impact resistance Requirements, and to improve shaft stress state.