铝合金板式节点单层球面网壳的自振特性研究

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (21) : 1-7.

论文

王丽，郭小农，朱劭骏，罗晓群

作者信息 +

Free vibration characteristics of single-layer spherical aluminium alloy-latticed shells with gusset joints

WANG Li,GUO Xiaonong,ZHU Shaojun, LUO Xiaoqun

Author information +

文章历史 +

摘要

为了研究K6型和K8型铝合金板式节点单层球面网壳的自振特性，本文采用有限元软件ANSYS进行了大规模有限元分析，分析中考虑了矢跨比、跨度、屋面荷载、跨厚比、网格密度、约束条件等参数的影响。基于有限元分析结果，拟合得到了不考虑节点刚度影响时单层球面网壳的基本自振频率估算公式。然后考虑板式节点刚度的影响，引入基频放大系数，进一步提出了考虑板式节点刚度影响的网壳基频估算公式。最后将所提出的估算公式的计算值与某铝合金板式节点网壳的实测基频进行了比较，结果吻合良好，证明了公式的有效性。

Abstract

In order to study free vibration characteristics of K6 and K8 aluminum alloy single-layer spherical latticed shells with gusset joints, large amounts of finite element (FE) analyses were performed using the software ANSYS considering effects of rise-span ratio, span, roof load, span-thickness ratio, grid density and constraint conditions, etc.parameters.Based on the FE simulation analysis results, the formula to estimate the fundamental natural frequency of single-layer spherical latticed shells not considering effects of joint stiffness was derived.Then, by introducing the amplification factor for the fundamental natural frequency, the formula to estimate the fundamental natural frequency of aluminum alloy shells considering effects of their gusset joints’ stiffness was proposed.Finally, the calculated value obtained with the proposed formula was compared with the measured fundamental natural frequency of a certain actual shell with gusset joints in tests.It was shown that both of them agree well each other, so the effectiveness of the proposed formula is verified.

导出引用

王丽，郭小农，朱劭骏，罗晓群. 铝合金板式节点单层球面网壳的自振特性研究[J]. 振动与冲击, 2018, 37(21): 1-7

WANG Li,GUO Xiaonong,ZHU Shaojun, LUO Xiaoqun. Free vibration characteristics of single-layer spherical aluminium alloy-latticed shells with gusset joints[J]. Journal of Vibration and Shock, 2018, 37(21): 1-7

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