挠性复铜箔板的应用开发

通过对挠性复铜箔板复事技术的分析和研究,在关键技术上,提出了三辊逆转涂布方式,全封闭三区段温度自动控制、自动巡回监测的烘道控制系统,以及由热压滚筒机构组成,由加热、液压系统控制的热压装置。对挠性复铜泊板的应用进行了开发,取得了较好的效果。     

现浇空心板在设计中的应用

作者依据工程实例，介绍了现浇空心板在设计中应遵循的基本原则及各种必要的构造措施。     

浅谈筏板基础设计

探讨了筏板基础的地基承载力及变形计算方法,并对筏板基础的设计和造型原则进行了简述.     

发夹式换热器管板瞬态热分析

以发夹式换热器为分析对象,在冷态启动工况下,考虑温度载荷的作用,采用ANSYS有限元软件对管板进行瞬态热固耦合分析,研究不同温升速率下,管板最大热应力所在的位置及变化规律。通过瞬态分析,研究发夹式换热器管板的抗热冲击能力。     

板木家具实木化设计方法研究

概述了板木家具实木化结构分类;介绍了板木家具通过材料以及结构形态设计表现实木质感的形式,从结构形态和材料两个维度,以及零部件实木化和结构组合实木化两个层面,探讨了提升板木家具实木质感的设计方法。阐述了该设计方法在板木桌类、椅类、床类、柜类家具设计中的具体应用。该设计方法可以减少优质木材资源的利用,有效增强板木家具的实木质感。     

施切机板厚预选装置的研究设计和应用

对机械顶轴单板旋切机增加板厚预选装置进行了研究与开发、设计出了能满足新老用户使用的板厚预选装置，以适应当前市场的需要。     

浅谈高层建筑筏板基础的设计

筏板基础因其良好的性能得到了建筑设计人员的青睐。针对目前高层建筑中比较常用的筏板基础的设计进行了介绍,对相关工作人员有一定的借鉴作用。     

公路桥梁设计方法的演变及评述

本文从历史的角度简述了桥梁设计方法的演变过程,并对各阶段设计方法的优缺点,进行了评述。     

增强板木家具实木感的设计方法

在绿色环保理念的感召下,实木家具成为消费者喜爱的家具类型,但随着木材价格的上涨,实木家具产品的价格随之攀升,一般消费者难以承受这高昂的价格。这种矛盾导致了板木家具(frame-board typefurnitureFBF)的诞生。板木家具是外形介于板式家具和框式家具之间、给人以实木造就之观感的一类家     

整体式桥台桥梁搭板设计与构造

结合整体式桥台桥梁搭板的受力特点,探讨了整体式桥台桥梁搭板的构造措施,阐明了桥头搭板采用分段的形式可有效释放结构的温度变形,利用具有高粘弹性的橡胶改性沥青填充材料作为变形缝的填料,既能方便施工、缩短工期,又能保证接缝质量,使接缝更加平顺。本文的构造措施可为整体式桥台桥梁搭板的细部设计提供参考。     

Manufacture and properties of high-performance oriented strand board composite using thin strands

Three-layered composite oriented strand boards were manufactured using very thin hinoki (Japanese cypress, Chamaecyparis obtusa Endl.) strands oriented in the faces and mixtures of sugi (Japanese cedar, Cryptomeria japonica D. Don.) and hinoki particles in the core. The boards were composed of two density levels, with 1:8:1, 0.5: 9 : 0.5, and 0: 10 : 0 face: core: face ratios. Polymeric and emulsion type isocyanate resins were used. The resin contents for the strands in the face and particles in the core were 10% and 5%, respectively. The steam-injection press was applied at 0.62MPa (160°C), and the steam-injection time was 2min. The mechanical and physical properties of the boards were evaluated based on the Japanese Industrial Standard. The parallel moduli of rupture and elasticity along the strand orientation direction and the wood screw retaining force increased with increasing face/core ratios. Incorporation of 10%–20% of thin strands in the face of the boards improved the parallel moduli of rupture and elasticity by 47%–124% and 30%–65%, respectively. In addition, the thickness swelling after water-soaking at 20°C for 24h, and the parallel linear expansion after boiling for 2h and water-soaking at 20°C for 1 h, of the three-layered composite boards were below 8% and 0.15%, respectively, despite a short steam-injection press time. The thickness swelling of the boards decreased with increasing face/core ratios. In contrast, the presence of face strands seems to have a minimal effect on the moduli of rupture and elasticity along the perpendicular direction of the three-layered composite boards. A similar trend was observed for the internal bond strength, hardness, and linear expansion along the perpendicular direction.This paper was presented at the 47th annual meeting of the Japan Wood Research Society, Kochi, April 1997     

钢筋混凝土板的加固补强初探

分析钢筋混凝土板的加固补强方法,探讨其可行性。     

三种竹碎料板的物理力学性能比较分析

对三种竹碎料板的物理力学性能进行了比较分析。板材弹性模量：竹席增强竹碎料板〉竹碎料/木纤维复合板〉普通竹碎料板;静曲强度：竹席增强竹碎料板〉竹碎料/木纤维复合板〉普通竹碎料板;吸水率：普通竹碎料板〉竹碎料/木纤维复合板〉竹席增强竹碎料板;吸水厚度膨胀率：普通竹碎料板〉竹碎料/木纤维复合板〉竹席增强竹碎料板;内结合强度：竹碎料/木纤维复合板〉竹席增强竹碎料板〉普通竹碎料板。     

内置式电热木地板结构设计与优化

从工业化生产角度出发,根据地板热传导模型对产品结构进行了三维仿真设计,并进行有限元分析,提出由装饰表板、次表板上基材、发热材料、导热材料、下基材、隔热材料等通过胶黏剂进行复合封装的内置发热实木复合地板结构的设计方案,采用Solidworks软件进行了设计仿真与有限元分析,并结合仿真结果对制备工艺进行分析。结果表明,该设计方案有望解决现有发热木地板制造工艺复杂、热效率不高等问题。     

重组木碾压疏解设备关键部件的设计与有限元分析

对重组木碾压疏解设备的关键部件(疏解辊轴、机架)进行了结构设计。利用ANSYS软件的Workbench模块对疏解辊轴和机架进行静态分析,得出相应的应力云图和位移云图,分析表明最大应力值和最大变形位移均小于相应的许用应力、变形误差,验证了疏解辊轴和机架的设计具有较好的结构强度和刚度。通过对机架模态进行分析,得出对应的固有频率和振型,分析结果表明,稳定性满足设计要求,且可避免产生共振现象。     

预制板楼面开裂的原因及预防措施

本文论述了预制板楼板面沿板缝开裂的原因及预防措施,并提出了避免产生其它一些通病的方法。     

柔性路面结构承载力评价方法的研究

通过对设计弯沉和容许弯沉的分析，提出了与道路交通量相联系的柔性路面结构承载力评价指标，根据实测弯沉值与评价指标的关系评价了柔性路面的结构承载力。     

浅谈均质刨花板及生产工艺

均质刨花板是九十年代初在欧洲出现的新产品。产品性能是在普通刨花板和中密度纤维板之间,其生产工艺基本同于普通刨花板,但在很多方面是普通刨花板所不能替代的,因此在人造板市场上具有很强的竞争力。     

数控专用裁板锯切削系统的设计

数控专用裁板锯主要应用在人造板板条的初加工过程中,专用于高效加工复合木门所需的人造板板条。切削系统是数控专用裁板锯的核心部件,其合理的结构设计能够直接提高整机的可靠性。利用建立虚拟模型及理论计算的方法,研究切削系统的结构,验证切削系统满足工作要求的程度,并分析切削系统可能存在的设计隐患,采取配备相应的解决措施,从而确定满足要求且安全可靠的数控专用裁板锯切削系统的结构。     

Finite element analysis of bending stiffness for cross-laminated timber with varying board width

ABSTRACT

Cross laminated timber (CLT) is a wood panelling building system that is used in construction, e.g. for floors, walls and beams. Because of the increased use of CLT, it is important to have accurate simulation models. CLT systems are simulated with one-dimensional and two-dimensional (2D) methods because they are fast and deliver practical results. However, because non-edge-glued panels cannot be modelled under 2D, these results may differ from more accurate calculations in three dimensions (3D). In this investigation, CLT panels with different width-to-thickness ratios for the boards have been simulated using the finite element method. The size of the CLT-panels was 3.0 m × 3.9 m and they had three and five laminate layers oriented 0°–90°–0° and 0°–90°–0°–90°–0°. The thicknesses of the boards were 33.33, 40.0, and 46.5?mm. The CLT panel deformation was compared by using a distributed out-of-plane load. Results showed that panels with narrow boards were less stiff than wide boards for the four-sided support setup. The results also showed that 2D models underestimate the displacement when compared to 3D models. By adjusting the stiffness factor k88, the 2D model displacement became more comparable to the 3D model.