K8型单层球面网壳顶点竖向冲击下的冲击荷载特征及荷载简化模型

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (1) : 33-38.

论文

K8型单层球面网壳顶点竖向冲击下的冲击荷载特征及荷载简化模型

尹弘峰1 ，支旭东2

作者信息 +

CHARACTERISTICS AND SIMPLIFIED MODEL OF THE IMPACT LOAD FOR KIEWITT8 SINGLE-LAYER RETICULATED DOME UNDER IMPACT

Hongfeng Yin 1 Xudong Zhi2

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文章历史 +

摘要

为简化网壳结构遭受冲击作用时复杂的接触分析过程，基于ANSYS/LS-DYNA建立了单层K8型球面网壳模型，并模拟其在不同冲击作用下的失效过程，辨别网壳的失效模式，并获取了冲击过程中的冲击力曲线。通过对网壳遭受竖向冲击荷载下的这些冲击力曲线特征进行分析，提出了简化的冲击荷载模型，并应用能量守恒定律和动量定理确定了模型相关参数。利用此冲击力模型对网壳结构在冲击荷载下的响应进行分析并与实体冲击物作用下的响应进行了对比，验证了该模型的准确性，应用该模型可以实现对网壳抗冲击性能的简单有效评估。

Abstract

In order to simplify the complex modeling and increase the analysis efficiency of reticulated domes under impact, a single-layer Kiewitt-8 reticulated dome under vertical impact was simulated in ANSYS/LS-DYNA. Failure mode was distinguished and the impact force-time curves were acquired. According to the characteristics of impact load, the momentum theorem and the law of conservation of energy, a simplified force-time function model was presented. With the aid of this simplified model the impact resistance capacity of the structure was simply and effectively estimated.

导出引用

尹弘峰;支旭东. K8型单层球面网壳顶点竖向冲击下的冲击荷载特征及荷载简化模型[J]. 振动与冲击, 2015, 34(1): 33-38

Hongfeng Yin Xudong Zhi. CHARACTERISTICS AND SIMPLIFIED MODEL OF THE IMPACT LOAD FOR KIEWITT8 SINGLE-LAYER RETICULATED DOME UNDER IMPACT[J]. Journal of Vibration and Shock, 2015, 34(1): 33-38