The manufacture system of filament winding ( fw ) and fiber placement ( fp ) is the one of advanced equipment for frp products . it can be used to produce the products of the positive curvature gyration bodies , such as container cylinder , oil tank , tube , orb , cone , assembled body and so on . furthermore , it is more suited to machining some products of the complex bodies such as the surfaces of the negative curvature gyration bodies , the shell components which have slots and reinforced tendons 纤维缠绕/铺放联合制造系统是纤维增强塑料( frp )制品生产的先进制造装备之一，可用于制造如圆筒容器、储罐、管、球、锥形体或组合形体等正曲率回转体的制品，更适用于制造含有负曲率的回转体表面、具有深槽、加强筋的壳体构件等外形相对复杂的纤维增强塑料制品。
Based on some discussions on the mathematic model set up for the cathodic protection potential field , a two - dimensional boundary element method ( bem ) is developed , and by using which , a study on the shielding effect resulted from some typical inner structures such as the reinforcing elements and the partition walls with man holes on distribution of potential and current density in the cathodic protection is performed . the investigated parameters which affect the shielding effect in the calculating model include : the height and thickness of the reinforcing elements , the distance between the anode and the reinforcing elements , and the diameter of man hole on the partition walls , and so on 本文在讨论了阴极保护电位场问题的数学模型的基础上，以二维边界元法对阴极保护问题中的电位及电流密度分布进行了模拟计算，重点对船舶压载舱中的典型结构如加强筋、人孔等在阴极保护中所产生的屏蔽效应进行了分析和研究，通过对不同高度、厚度的挡板及不同孔径的带孔板所产生的屏蔽效应进行模拟计算，首次得到了一些对实际工程设计具有重要参考意义的见解。
This paper constructs fe models of srm in detail and analyzes the vibration mode and natural frequencies with the finite element analysis software package , and studies the influence of the stator structure of srm , such as stator poles , ribs , mounting feet , terminal block and structure parameters , restriction condition on the srm vibration behavior , the contrast to experiment result implies that the fea model is close to the real model for analyzing the vibration characteristics of srm 本文基于有限元分析方法，主要研究了定子凸极、底座、散热筋，加强筋，接线盒等结构以及结构参数对定子固有频率和振动模态的影响，并且研究了约束条件下的sr电机定子振动特性。本文比较了模态实验与有限元分析结果，表明所建立的二维有限元模型对分析sr电机的振动特性有较好的精度。
In the analysis of the elastic tripping of the stiffener , the critical stress under this mode of failure is derived by using the energy method and the principle of least potential energy . in the analysis of the elastic overall buckling of stiffened plates , attention is focused on global buckling , and local buckling effects are neglected 对于加筋板中筋的侧倾失稳，则通过能量法推导加强筋侧倾失稳时的总势能泛函，利用最小势能原理求解出此失稳模式下的临界应力。
Uses the high quality special molding manufacture , but becomes by the kneading board and the leg combination ; has the contour artisticly , firm is durable , does not need to maintain and so on the merit ; the kneading board and the inside lining stiffener spreads across , the bearing power optimizes , leg each strengthens processing , the average distributed load ; the surface uses galvanizes or the static electricity spurts models processing , is advantageous for cleanly , is not easy to pollute ; is suitable in various professions , the many kinds of situations , the use scope is extremely broad 钢制托盘：采用优质特种型材制造，由面板和支腿组合而成；具有外形美观、坚固耐用、无须维护等优点；面板与内衬的加强筋纵横交错，承重能力更加优化,支腿各面均强化处理，平均分布载荷；表面采用镀锌或静电喷塑处理，便于清洁、不易污染；适用于各行业，多种场合，使用范围极广。
The ship ' s hull is a thin - walled box girder structure composed of stiffened panels . the overall failure of a ship hull girder is normally governed by buckling and plastic collapse of the deck , bottom , or sometimes the side shell stiffened panels . therefore , the analysis of buckling and ultimate strength of ship panels in deck , boltom , and side shells is very important and necessary for the safety assessment of ship structure . in stiffened panels , local buckling and collapse of plating between stiffeners is a basic failure mode , and thus it would also very important to evaluate the buckling and ultimate strength interaction of plate elements under combined loads 船体梁的总体失效通常取决于甲板、船底板，有时候是舷侧加筋板的屈曲和塑性破坏。因此，对于衡量船体结构的安全性而言，对甲板、底板、舷侧板进行屈曲和极限强度分析是十分重要且必须的。对于加筋板而言，加强筋间的板格之局部屈曲和失效是最基本的失效模式。
In the hogging condition , double bottom and the side shell remain the ultimate bucking strength , deck and upperwing tank remain the yield stress , and the other parts keep elasticity . then the key to calculate the ultimate strength of ship hull girders is to ascertain the ultimate bucking strength of the stiffened panels . in this regard , the developed formulation is designed to be more sophisticated than previous simplified theoretical method for calculating the ultimate strength of stiffened panels under combined in - plane bending and lateral pressure . fabricatio n - related initial imperfections ( initial deflections and residual stresses ) are included in the panel ultimate strength calculation as parameters of influence . all possible collapse modes involed in collapse of stiffened panels , including overall buckling collapse , column or beam - column type collapse , tripping of stiffeners and local bukling of stiffened web are considered 确定了船体梁整体破坏时的剖面应力分布之后，关键在于确定板架的极限屈曲强度。本文充分考虑了在纵向弯曲、横向压力作用下加筋板可能发生的几种破坏模式，即板架的整体屈曲破坏、梁柱形式的破坏、筋的侧倾、腹板的屈曲并同时考虑了初始焊接残余应力、初挠度的影响，使其更精确的计算加筋板的屈曲强度。对于加筋板中加强筋腹板的局部屈曲，采用解析法推导出筋的腹板的挠度方程及其边界条件，求解相应的方程，从而计算出腹板的局部屈曲应力。
