CAJ | 학술논문

通过分析现行规范关于艉轴架强度的计算理论，发现该理论未考虑艉轴架结构刚度耦合作用。因此，针对艉轴架结构的受力特性，建立考虑艉轴架刚度耦合的艉轴架反力计算模型，推导出考虑艉轴架刚度耦合作用的内力计算公式，定义描述结构刚度耦合作用的“广义刚度比”参数，并将该公式与现行计算公式进行无量纲化对比。以某船艉轴架结构为例，对其分别采用有限元模型仿真、本文计算理论和现行不考虑艉轴架刚度耦合的计算理论等3种方法进行定量计算，并提出艉轴架扭转刚度的计算方法。结果表明：基于本文考虑耦合的内力计算理论的计算结果与有限元仿真结果符合良好，不考虑耦合的现行计算理论的计算结果与有限元仿真计算结果相差较大；现行不考虑耦合的内力计算理论使艉轴架截面内应力计算结果偏大，且随着“广义刚度比”的增大而严重，从而可能导致“艉轴架结构强度的过度设计”。
통과분석현행규범관우미축가강도적계산이론，발현해이론미고필미축가결구강도우합작용。인차，침대미축가결구적수력특성，건립고필미축가강도우합적미축가반력계산모형，추도출고필미축가강도우합작용적내력계산공식，정의묘술결구강도우합작용적“엄의강도비”삼수，병장해공식여현행계산공식진행무량강화대비。이모선미축가결구위례，대기분별채용유한원모형방진、본문계산이론화현행불고필미축가강도우합적계산이론등3충방법진행정량계산，병제출미축가뉴전강도적계산방법。결과표명：기우본문고필우합적내력계산이론적계산결과여유한원방진결과부합량호，불고필우합적현행계산이론적계산결과여유한원방진계산결과상차교대；현행불고필우합적내력계산이론사미축가절면내응력계산결과편대，차수착“엄의강도비”적증대이엄중，종이가능도치“미축가결구강도적과도설계”。
In this paper,the current specification concerning strength computing theory of shaft bracket is analyzed,and it is seen that structural stiffness coupling is not considered in this theory. In the view of the shaft bracket structural and mechanical features,the reaction force model of shaft brackets considering structural stiffness coupling is established,and the calculation formulas for the internal forces of the shaft brackets are derived,and the parameters of the generalized stiffness ratio describing the structure stiffness coupling effects is defined. Taking shaft brackets of a certain boat as an example,the quantitative calcula?tion on FEM simulation,the computing theory presented in this paper,and the conventional computing theory without considering structural stiffness coupling are applied,respectively. In addition,the comput?ing method on torsional rigidity of shaft brackets is also put forward. The results show that the computing theory of this paper agrees well with the FEM simulation,while the conventional theory deviates far from the FEM simulation performance. Moreover,the conventional theory yields larger result,which further worsens with the enlargement of the generalized stiffness ratio,causing the overly design of the shaft brack?et structure strength. In brief,the computing theory proposed in this paper serves as great guidance to the optimization in the strength design of the shaft bracket structure.