多设备长条形基座的螺栓受力确定方法

Bolt force determination method of multi-equipment long-strip base

[目的]安装有多组设备的长条形基座在各种局部载荷作用下其螺栓群受力与普通基座不同,具有局部性的特点。[方法]采用有限元法分析基座螺栓群受力,梳理计算步骤和注意事项。针对基座局部承受的拉力、横向和纵向弯矩以及组合载荷作用,运用连续梁理论、力与力矩的平衡,给出一套螺栓群受力的简化计算方法和公式。结合某长条形基座在多种局部载荷作用下的螺栓群受力分析,说明计算过程和精度。[结果]结果表明:所提计算方法简单且精度较高,通常略大于有限元计算结果并偏于保守。[结论]该确定方法可用于舰船设备基座的设计及船体支撑结构的强度分析。

[Objectives]The force of a bolt group of a long strip base with multiple sets of equipment under various local loads is different from that of the ordinary localized base to meet the needs of the base design.[Methods]The procedures and key technology of the finite element method to analyze the force of a bolt group are summarized.Based on the continuous beam theory and the balance of force and moment,a set of approximate simplified calculation methods and formulas is proposed to determine the force of bolts on a strip base of multi-group equipment under local tensile force,transverse bending moment,and longitudinal bending moment and combined loading.The force of the bolt group on a strip base under various local loads was calculated and compared using the proposed method.[Results]The results showed that the method presented in this paper is simple and accurate,usually slightly larger than the finite element result and tends to be conservative.[Conclusions]The method proposed can be used in the design of ship equipment bases and strength analysis of ships'support structure.