| 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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| 引用本文： | 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. |
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| 作者姓名： | 尹弘峰 支旭东 |
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| 作者单位： | 1. 中国中元国际工程有限公司，北京 100089；2.哈尔滨工业大学土木工程学院，哈尔滨 150090 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 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。
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| 关 键 词： | 单层球面网壳 冲击 冲击力模型 失效模式 |
Characteristics and simplified model of impact load for Kiewitt 8 single-layer reticulated dome under vertical impact |
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| YIN Hong-feng,ZHI Xu-dong.Characteristics and simplified model of impact load for Kiewitt 8 single-layer reticulated dome under vertical impact[J].Journal of Vibration and Shock,2015,34(1):33-38. |
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| Authors: | YIN Hong-feng ZHI Xu-dong |
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| Affiliation: | 1. China IPPR International Engineering Company Limited, Beijing 100089；2. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090 |
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| 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. |
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| Keywords: | single-layer reticulated dome impact impact force model failure mode |
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