舰船轴系用液压螺栓抗冲击性能数值仿真研究

Numerical simulation of the anti-shock performance of hydraulic expansion bolt structure for marine shafting system

液压螺栓由于装拆方便,可承受大扭矩而在舰船轴系中得到广泛应用。本文基于非线性接触理论,建立某型液压螺栓接触有限元分析模型,获得最大扭矩工况下液压螺栓的接触应力。基于现代冲击基础理论,建立液压螺栓抗冲击仿真模型,分别采用频域法和时域法对其进行考虑接触应力时的抗冲击性能仿真。计算得到该液压螺栓冲击载荷作用下的应力分布,为其抗冲击设计与评估提供依据。研究结果表明该液压螺栓符合抗冲击要求。

Hydraulic expansion bolt is being widely used in modem naval shafting system,due to its convenience in assembly / disassembly and good performance in large torque transmission. Based on nonlinear contact theory,a finite element model of a hydraulic expansion bolt was built. The distribution of the contact stress was obtained in the working condition of maximum torque. Furthermore,based on modern impact theory,an anti-shock model of the hydraulic expansion bolt was built to simulate its antishock performance in both frequency and time domain with the consideration of the contact stress. The stress was obtained from the anti-shock simulation which could be useful for anti-shock design and evaluation. The results indicated that the design of hydraulic expansion bolt met the requirement of antishock.