【作者】 吕艳红；

【导师】 张远群；

【作者基本信息】 西北农林科技大学 ， 木材科学与技术， 2012， 硕士

【摘要】 本论文以苹果梨木为研究对象，对其材性及其家具结点强度进行了试验研究，并运用有限元软件ANSYS对苹果梨木座椅进行了整体力学分析，旨在为苹果梨木家具的优化设计与开发提供理论依据和指导。通过对各结点的抗弯强度试验，得出结点的接合方式以及连接结构都不同程度地影响着结点的抗弯强度，具体总结如下：（1）试验中所用的整体式闭口不贯通椭圆榫结合结点的抗弯强度最大（1498.5N），然后是整体式闭口贯通椭圆榫接合结点(1310.2N)，接着是双圆榫直角接合结点(883N)，偏心连接件接合结点的抗弯强度最小(354.2N)。（2）对于同种接合方式的结点，大致可得出：T型连接结构的结点的抗弯强度大于L型连接结构的结点的抗弯强度。通过对四种T型结点的抗拔强度试验，得出：四种T型结点中，整体式闭口不贯通椭圆榫接合结点的抗拔强度最大（7635N），然后是闭口贯通椭圆榫接合结点(4113.6N)，最后是双圆榫直角接合结点(2141.6N)和偏心连接件接合结点(1516N)。通过结点的抗弯强度和抗拔强度试验，可得出整体式闭口不贯通椭圆榫接合结点的强度是最好的，然后是闭口贯通椭圆榫接合结点，最后是双圆榫直角接合结点和偏心连接件接合结点。运用有限元软件ANSYS对苹果梨木座椅进行强度分析。分析表明：当对苹果梨木座椅的座面和靠背分别施加6500Pa的垂直载荷和6250Pa的水平载荷时，椅子的最大变形产生在靠背的最上方，变形量为1.095×10-3m；最大应力值为0.474×107Pa,出现在座面附近的椅后腿上。结合试验数据，得出该座椅的结构设计是合理的，强度是足够的。通过以上结论，可以看出不同接合方式和连接结构的框架式苹果梨木家具结点的强度情况。家具设计者可根据所设计的框架式苹果梨家具的受力情况的不同，选择最合适的结点接合方式和连接结构。更多还原

【Abstract】 In order to provide theoretical basis and guidance for apple-pear wood funitureoptimization design and development, this article investigated wood properties of apple-pearwood and strength of furniture constructed of it, the study also analyses the mechanicalstrength of a apple-pear chair using finite element software ANSYS.Through the bending strength test of different furniture joints, it shows that the joint formand joint structure all affect the joint strength in some degree. The conclusions are as follows:(1) The hidden ellipse mortise-and-tenon joint has the largest bending strength, which is1498.5N; the run-through ellipse mortise-and-tenon joint has the second largest bendingstrength, with the bending strength of1310.2N; the bending strength of double dowels jointand eccentric fittings joint is smaller, which h is883N and354.2N.(2)As to the same kind of joint form, bending strength test result shows that the bendingstrength of component T is larger than component L.Through the withdraw strength test of four kind of T-type joint, it shows that the hiddenellipse mortise-and-tenon joint has the largest withdraw strength, which is7635N; therun-through ellipse mortise-and-tenon joint has the second largest bending strength, with thebending strength of4113.6N; the bending strength of double dowels joint and eccentricfittings joint is smaller, which h is2141.6N and1516N.Based on the bending strength test and withdraw strength test, concludes that the hiddenellipse mortise-and-tenon joint has the best strength property, then is the run-through ellipsemortise-and-tenon joint, the next is the double dowels joint, and the last is the eccentricfittings joint.In the end of this article, it uses Finite Element Software ANSYS to analyse themechanical strength of apple-pear wood chair. Results show that the maximum deformationof the chair appears on the top of the back, which is1.095×10-3m, and the maximum stressappears in the back legs of the chair near the seatsurface, which is0.474×107Pa, whileapplying vertical load of6500Pa on the seatsurface and horizontal load of6250Pa on the back.Based on experimental data, the author concludes that the structural design of the chair isreasonable and its strength is sufficient. The conclusions above suggest the strength of frame furniture joint constructed ofapple-pear wood with different joint form and joint structure. Furniture designers can choosethe most suitable joint form and joint structure according to the stress state of apple-pearwood frame furniture they have designed.更多还原