螺栓预紧力对上舵承的强度影响分析

Simulation Analysis of Bolt Pre-tightening Force Influence on Upper Rudder Bearing Strength

船舶平面摩擦上舵承通常配备止推块及紧固螺栓(或紧固螺柱),用于承受由舵叶水动力引起的径向载荷。紧固螺栓可承受径向载荷值与螺栓预紧力值成正比关系,在径向载荷不变的情况下,通过调整螺栓预紧力值可改变螺栓可承受径向载荷值,进而对上舵承本体及止推块强度产生影响。本文以2 600 TEU集装箱船上舵承为实例,使用软件Solidworks/Simulation模块对不同螺栓预紧力下的上舵承强度展开分析,确定适用于本船上舵承螺栓预紧力范围。本文仿真分析的方法和结果,为类似上舵承螺栓预紧力分析提供了很大的参考价值。

Ship’s plane friction upper rudder carrier are usually equipped with chock stopper and fastening bolt(or fastening double-screw bolt)for bearing radial force caused by hydrodynamic force of rudder blade.The radial load bearing value of fastening bolt is directly proportional to the pre-tightening force value of bolt.Under the condition that the radial load keeps unchanged,the bolt radial load bearing value can be changed by adjusting the bolt pre-tightening force value,which can make impact on the strength of upper rudder carrier body and chock stopper.This paper is based on 2600 TEU container vessel upper rudder carrier,using software Solidworks/Simulation module to analyze the strength of upper rudder carrier under different bolt pre-tightening force,and to determine the range of upper rudder carrier bolt pre-tightening force applicable to this ship.The method and results of the simulation provide great reference for the analysis of similar upper rudder carrier bolt pre-tightening force.