- 更多网络例句与有效横截面相关的网络例句 [注：此内容来源于网络，仅供参考]
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The basic approach of protecting people from being hurt or killed in an accident is to improve crashworthiness of vehicles. This paper starts with discussing theories and methods for vehicle passive safety design, which included experiential methods, analytic methods, multi-body dynamics methods, crash test methods and the finite element method. Emphasis will be paid to the basic FEM theories and algorithms of impact problems. Topics discussed include the governing equation, element discretization, hourglass control, time integration, material model, shell element algorithms and contact-impact algorithms. For more reliable simulation results, this paper then conducts study on how to accurately get material model parameters by combining the FEM method with experimental method, and develops relevant material test machine and parameter calculating software. Based on that, basic typical impact simulation and test validation study are conducted. On the basis of the above work, the paper studies the thin-shell structures'crashworthiness, which was affected by the following factors: spot-weld features, shell thickness, cross-section and pre-deformation. As to vehicle parts'crashworthiness, the paper conducts simulation study of designing energy-absorbing steering system and adaptive airbag system. A practical energy-absorbing steering wheel is designed as an example. In further depth research, the paper suggests several inverse quantificational methods for vehicle crashworthiness design based on the ideal crash characteristics. The above theories and methods are applied with good results through several practical vehicles' crashworthiness design and improvement.
文中对汽车碰撞安全性的设计理论和方法进行了归类和总结，其中包括经验法、解析法、多刚体动力学法、试验法以及有限元方法等；重点介绍了碰撞有限元法的基本理论和有关算法，涉及到有限元求解控制方程、单元离散、沙漏模态控制、时间积分、材料模型和应力修正、薄壳单元算法以及接触碰撞界面算法等，探讨了有限元计算中的材料模型参数获取技术，开发了相应的材料试验装置及材料模型参数反求软件，在此基础上进行了基本的碰撞仿真算例和试验对比研究；文中通过应用有限元方法研究了薄壁构件的碰撞吸能特性，指出了设计薄壁吸能构件时需要考虑的几个主要影响因素，即焊点、壁厚、横截面和预变形等；在关于车辆部件的碰撞安全性能设计中进行了吸能转向机构和自适应安全气囊的仿真研究，提出了吸能转向机构和自适应安全气囊的仿真研究方法；文中最后探讨了整车碰撞性能的设计与改进方法，提出了以理想碰撞特性为目标，采用分段加速度或者根据碰撞时间进行设计的反推设计法、部件吸能仿真优化设计法等量化设计方法，并通过综合应用文中所讨论的相关技术进行了整车碰撞性能的设计与改进实例研究，所选定的车型是大众化的普通轿车和碰撞安全性基础较差的微型面包车，研究结果表明，本文所提出的设计与改进方法是适用而有效的，具有重要的工程实用意义和价值。
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Cross sectional regression and contingency table are widely used in the research of mutual fund performance persistence. These methods are ineffective when each individual fund is concerned.
基金业绩持续性检测的一般方法是横截面回归与列联表分析，都是从基金行业层面整体检测持续性，不能有效的检测单只基金的业绩持续性。
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Research results indicate that casing bend not only makes effective cross section decrease but also leads to casing snapping owing to larger local tensile stress.
结果表明：套管弯曲不仅使有效横截面降低而且由于局部拉应力过大造成套管拉断。
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For comparison reason, the planar and spatial models based on a forewing structure were analysed, it is shown that the cambered corrugation in the wings can improve the flexural stiffness of dragonfly wings effectively; the veins distribution and their size variation in different zones are quite reasonable.
对前翅平面模型和立体模型的静力性能进行了对比分析，发现翅膀中的起拱、起皱结构可显著提高蜻蜒翅膀的弯曲刚度；分布在翅膀不同区域的翅脉横截面尺寸与其受力大小是完全相适应的。对翅膀模型分有膜、无膜两种情况进行对比分析，得出翅膜中产生的膜应力刚化效应可有效改善翅膀结构的刚度。
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It shows that the exhaust resistance at the wind blast end reduces obviously, driven by the 800mA/12V small scale draught fan, average exhausting speed reaching above 4m/s, fairly enough to satisfy the air conditioner's demand for new wind volume. Meanwhile, the conic section of the horizontal profile and the linear design of the longitudinal profile of the exhaust end inner cavity and wind shroud for each outlet greatly reduce the flowed out exhaust, effectively lowering the wind blowing feel of the air conditioner user by playing the function of air diffusion.
经过计算和实际测试表明，该装置的送风末端风口阻力明显减小，在800mA/12V小型风机驱动下，出口平均风速可达4m/s以上，足以满足空调对象的新风量要求；同时，横截面采用2次曲线型设计、纵截面采用流线型的送风末端内腔和出口均风罩使气流流出后风速迅速衰减，起到散流器的作用，有效降低了空调对象的吹风感。
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Microfiber Products detail: Microfiber refers to the so-called 0.4uM of the micro-diameter fibers, its fiber silk degrees only 1 / 10 special wedge-shaped cross-section to enable it to more effectively capture even a few microns of dust particles, decontamination, to oil the effect is very obvious. 75:25 of polyester / nylon ratio, making material is extremely soft, on the swab surface without any harm, even in the field of high precision, such as lens coating, large scale integrated circuit manufacturing process can also be assured that the use of its water volume, water absorption speed is ordinary cotton fabric for more than 5 times.
所谓超细纤维是指直径0.4uM的微纤维，其纤维度仅为真丝1/10特殊楔型横截面，使它能更有效地捕获甚至几微米的尘埃微粒，除污、去油的效果十分明显。75：25的聚脂/耐纶比，使得质料极其柔软，对被拭物表面无任何伤害，即使在高精密领域里如镀膜镜头、大规模集成电路生产过程中也能够放心使用，其吸水量、吸水速度是普通棉织物的5倍以上。
- 更多网络解释与有效横截面相关的网络解释 [注：此内容来源于网络，仅供参考]
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effective cross section：有效横截面
effective crack length 有效裂隙长度 | effective cross section 有效横截面 | effective energetic efficiency 有效能量效率
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effective cross section：有效横截面;有效横断面
dangerous section 危险断面;危险段 | effective cross section 有效横截面;有效横断面 | vane pattern section 叶片木模截面