Numerical simulations and analytical results show: in longitudinal and oblique seas, ship may be subjected to primary parametric resonance with large roll amplitude and even capsizing, when encounter frequency is near the twice of roll natural frequency, wave length and ship length are of the same order and the wave height is larger than a certain value; in oblique seas, ship roll motion is a forcedly-parametrically excited oscillation, primary resonance occur as the encounter frequency is near the roll natural frequency, which may lead to large rolling and capsizing too.
数值仿真和解析分析结果表明：在纵浪和斜浪中，当遭遇频率接近船舶横摇固有频率的两倍，波长和船长接近，波高超过某一阈值的时候，船舶会发生主参数共振，产生大幅横摇甚至倾覆；在斜浪中，船舶发生的是参强激励横摇运动，遭遇频率接近横摇固有频率时，还会激起横摇主共振，同样会产生大幅横摇甚至倾覆。
An dynamical model was developed in this paper for dynamic estimation of the longitudinal stiffness and rolling radius of the tires.
通过建立轮胎动力模型，利用基于模式搜索的最小二乘法对轮胎的纵向刚度和滚动半径两个参数进行了动态估计。
The results show that the longitudinal strength and elongation of alumina dispersion strengthened copper alloy cold rolled in unidirection are higher than that of transverse values for both cold rolling and annealing states.
结果表明：合金经过单向冷轧变形后，无论是冷轧态还是退火态纵向强度、伸长率均高于横向。
The result shows that the static coupling of longitudinal motions to the rolling equation is not exist, the coupling between them is mainly caused by waves.
结果表明，纵向运动对横摇的非线性静力耦合作用不存在，它们之间的耦合主要是由波浪引起的。
The items of calculation are displacement, foward, aft and mean drafts, longitudinal strength, metacentric height and rolling period etc.
本文讨论了这种配戴仪的框图和使用方法以及在本院远洋实习船《育英》轮上的实际应用情况。
Aiming at the special deformation mechanism during the with tension rolling of H beam in universal pass, a three-dimensional continuous kinematically admissible velocity field is put forward for the first time, in which, the non-uniform distribution of longitudinal velocity in lateral direction and the special deformation mechanism of the web and flange joint deformation zone are taken into consideration.
针对H型钢在万能孔型中带张力轧制时特殊的变形机理，首次提出了考虑金属横向流动的三维、连续运动学许可速度场；速度场中考虑了纵向流动速度沿横向的不均匀分布以及腹板和翼缘交界变形区的特殊变形状态。
2 Vertical longitudinal RCC collecting cards, so in hot roller asphalt mixture, only allowed 10 rounds of wide-20cm layer of cold material, then rolling vibration.
3.3.2 纵向接茬碾压纵向接茬时，使压路机位于热沥青混合料上，只允许轮宽的10～20cm在冷料层上，然后进行振动碾压。
Concept and has been shown to have potential for accurate longitudinal profile in stop-and-go traffic.
纵向扫描被用于本公司专利的Rolling Wheel Deflection 概念中，并有潜力应用于在启停行进状态下准确测量纵向路面的轮廓。
New multi—objectives function (including mill stand longitudinal stiffness, distribution coefficient of loaded pressure between rolls, weight of mill stand, rolling power, rolls loaded gap profile changeability of bending force, transverse mill stand stiffness of bending force, transverse mill stand stiffness of rolling load) multi—constraints (including rolls strength, spindle strength, backup roll bearing load, minimum rollable gauge, roll surface temperature rise) rolls system parameters optimization model of four—high cold strip mill is established, and programme for mill structural illustration creation on the platform of AutoCad designs is compiled. With this as basis, rolls system parameters of Yichang thin strip corporation's 1219 cold mill are calculated using SUMT (subsequent unconstrained minimization technology).
本文建立了以板形和板凸度控制特性为目标的四辊轧机多目标函数（包括轧机纵向刚度、辊间压力分布系数、轧机重量、功率、弯辊力对轧机辊缝形状改变能力、对弯辊力的横向刚度、对轧制力的横向刚度）、多约束条件（包括轧辊强度、接轴强度、支承辊轴承负荷、最小可轧厚度、轧辊温升等）的辊系参数优化模型，以此模型为基础，利用惩罚函数法计算了益昌薄板公司1219冷轧机辊系参数，编制了AutoCAD平台下的轧机结构示意图自动图形软件。
This article describes briefly process procedure and characters of 5 sets rolling tack welders for longitudinal submerged arc welding pipe unit, and introduces common defects during tack welding operation, such as air pocket, slag, arc burn, offset and misalignment etc.
简述了直缝埋弧焊管机组中五组压辊式预焊机的工艺过程及特点，介绍了预焊作业中常见的气孔、夹渣、烧穿、错边、焊偏等缺陷。
The surface defect of the wire rod is closely related with the defects of the billets (such as longitudinal crack, subsurface blowhole and entrapped slag) as well as scratch taking place in the process of hot rolling and cold drawing.
线状缺陷与铸坯缺陷（如纵裂纹、皮下气泡、夹渣等）以及热轧和冷拉拔过程中产生的划伤有关。
Based on rolling characters of longitudinal profiled (LP) plate, nip angle and biting condition are analyzed for LP plate rolling according to force condition.
基于纵向变截面轧制的特点，根据轧件受力分析了LP钢板轧制过程的咬入角和咬入条件。
Solve the main question in the longitudinal profiled plate rolling process, and provide the reliable reference data.
解决了楔形板轧制过程中的存在的主要问题，为工厂实际轧制提供了可靠的参考数据。
Improvement of non-uniform longitudinal wall thickness in tube-rolling on a φ 140mm plug mill
减小φ140mm自动轧管机组轧管的纵向壁厚不均
Bilateral shear is an auxiliary equipment in shear line of rolling finishing, which is used to cut the two longitudinal edges of steels.
双边剪是在轧制精整剪切线上用来剪切钢板两个纵向边部的辅助设备。
There were longitudinal surface cracks on Masteel beam blank, and they are the reason of defects after rolling.
马钢连铸异型坯存在表面纵裂纹，是造成轧后废品的主要原因。
The blade blank worked by hot rolling may appear so-called " black core " macrostructure in its longitudinal and cross section after acid pickling.
用热轧方法生产的锭杆毛坯，在其纵、横截面上经酸蚀后出现了“黑心”问题。
Adhesion problem of contact wheel and rail is essentially rolling friction problem, the max longitudinal friction by influence of many cases.
轮轨粘着问题实质上是滚动摩擦问题，机车车轮在钢轨上滚动其最大的纵向摩擦力受很多工况的影响。
The constituent, working principle of AGC system and the spring curve of rolling mill were introduced. The reasons for variation of thickness deviation in longitudinal direction were analyzed in detail, and the corresponding solutions were put forword.
介绍了液压AGC控制系统的组成、工作原理及轧机的弹跳曲线，详细分析了带材在纵方向上造成厚差波动的原因，并提出解决方案。
It was the first time that to make the longitudinal submerged arc welding pipe by rolling plate in our country or even in the world.
采用卷板制造直缝埋弧焊接钢管，在国内甚至世界上尚属首次。