Wherethe long bridge deck within 0 . 5 l amidships is regarded as strengthdeck , the midship section modulus and minimum thickness of the deckplating comply with the requirements of 2 . 2 . 1 and 2 . 4 . 2 . l of this ischapter 例1 :在船中部0 . 5l區(qū)域內(nèi)的長橋樓甲板作為強(qiáng)力甲板時(shí),其船中剖面模數(shù)及最小厚度應(yīng)滿足本章2 . 2 . 1及2 . 4 . 2 . 1的要求。
A time - variant reliability formulation is presented in this paper to account for the effects of fatigue , corrosion and maintenance actions on the first yield reliability of midship section modulus . a probabilistic model for long - term distribution of wave - induced fatigue stress range is established . for the purpose of obtaining the performance of structure that stands random fatigue load , the concept of stress parameter and equivalent stress range are introduced 船舶在由波浪彎矩引起的交變應(yīng)力作用下,船體構(gòu)件焊接點(diǎn)處的微小裂紋逐漸擴(kuò)展;同時(shí),隨著船齡的增加,眾多結(jié)構(gòu)構(gòu)件遭受腐蝕的作用;從而使船體梁剖面模數(shù)減小,船體梁承載能力衰減,船舶結(jié)構(gòu)的安全性將受到相當(dāng)大的影響。
From the study results it is showed that turret hole position near the forward of the midship has less effect to the ship girder strength and it is more reasonable using probabilty statistics method to estimate the extreme value of wave bending moment , by which the first approximate value of hull midship section modulus can be determined 研究結(jié)果表明:轉(zhuǎn)塔開孔位置在舯前附近對(duì)船體總強(qiáng)度影響不大;波浪彎矩極值用概率統(tǒng)計(jì)方法估算更為合理;船體結(jié)構(gòu)剖面模數(shù)的第一近似值可用波浪彎矩設(shè)計(jì)極值等來確定。
百科解釋
Section modulus is a geometric property for a given cross-section used in the design of beams or flexural members. Other geometric properties used in design include area for tension, radius of gyration for compression, and moment of inertia for stiffness.