面基层间不同结合状态下发射场坪动态响应研究

doi:10.3969/j.issn.1000-1093.2015.12.009

兵工学报 ›› 2015, Vol. 36 ›› Issue (12) : 2269-2277. DOI: 10.3969/j.issn.1000-1093.2015.12.009

论文

面基层间不同结合状态下发射场坪动态响应研究

周晓和¹，马大为²，朱忠领², 廖选平¹, 鞠晓杰¹

作者信息 +

Research on Dynamic Response of Launching Site Based on Different Interlayer Binding States

ZHOU Xiao-he¹， MA Da-wei²， ZHU Zhong-ling², LIAO Xuan-ping¹, JU Xiao-jie¹

Author information +

文章历史 +

摘要

为了得到面基层间不同结合状态下无依托发射场坪的动态响应，基于Cohesive单元的双线性内聚力本构，建立了层间结合数学模型，进一步建立了含层间效应的发射场坪数值模型；引入初始损伤变量并结合应变等价性假设，建立了层间不同结合状态数学模型；以含层间效应的发射场坪数值模型为基础，完成了面基层间不同结合状态下的发射场坪数值模型的建立，分析了发射筒底部处场坪面基层间界面的损伤分布与演化，研究了面基层间不同结合状态下发射场坪动态响应的变化。结果表明：当面基层间结合状态一定时，发射筒底部对地载荷作用边界处面基层间界面损伤最严重，且沿着载荷作用区域半径方向，面基层间界面损伤分布表现为先增加、后减小的规律；随着面基层间结合状态的变差，沿载荷作用区域半径方向，面基层间界面损伤演化表现为中间不变、两边减小的规律，场坪面层垂向位移和水平位移产生不同程度的变大，面层、基层层底中心最大应力均变小。为了得到面基层间不同结合状态下无依托发射场坪的动态响应，基于Cohesive单元的双线性内聚力本构，建立了层间结合数学模型，进一步建立了含层间效应的发射场坪数值模型；引入初始损伤变量并结合应变等价性假设，建立了层间不同结合状态数学模型；以含层间效应的发射场坪数值模型为基础，完成了面基层间不同结合状态下的发射场坪数值模型的建立，分析了发射筒底部处场坪面基层间界面的损伤分布与演化，研究了面基层间不同结合状态下发射场坪动态响应的变化。结果表明：当面基层间结合状态一定时，发射筒底部对地载荷作用边界处面基层间界面损伤最严重，且沿着载荷作用区域半径方向，面基层间界面损伤分布表现为先增加、后减小的规律；随着面基层间结合状态的变差，沿载荷作用区域半径方向，面基层间界面损伤演化表现为中间不变、两边减小的规律，场坪面层垂向位移和水平位移产生不同程度的变大，面层、基层层底中心最大应力均变小。

Abstract

To obtain the dynamic response of the launching site under the different binding states of base and surface layers, an interlayer binding mathematical model of base and surface layers is established based on bilinear cohesion constitutive of cohesive element. A cohesion mathematical model under different binding states of base and surface layers is established by introducing the initial damage variable and using the strain equivalence hypothesis. A numerical model of launching site under different binding states of base and surface layer is built based on the numerical model with interlayer effect, the distribution and evolution of damage on base-surface layer interface of the launching site below the bottom of launch canister are analyzed, and the dynamic response of the launching site under different binding states of base and surface layer is researched. The result shows that, when the base-surface layer binding state remains constant, the interface damage is the most serious in the base layer where the boundary is forced by the load applied by the bottom of the launch canister, and the interface damage of the base layer firstly increases and then decreases along the radius direction of the load area. When the binding state of base and surface layer gets worse,the interface damage of the base layer is invariant in the middle and decrease on both sides along the radius direction of the load area, the vertical and horizontal displacements of the launching site surface get larger in different degrees, and the maximum stresses of the surface and base layers center-bottom points get smaller.

导出引用

周晓和，马大为，朱忠领, 廖选平, 鞠晓杰. 面基层间不同结合状态下发射场坪动态响应研究. 兵工学报. 2015, 36(12): 2269-2277 https://doi.org/10.3969/j.issn.1000-1093.2015.12.009

ZHOU Xiao-he， MA Da-wei， ZHU Zhong-ling, LIAO Xuan-ping, JU Xiao-jie. Research on Dynamic Response of Launching Site Based on Different Interlayer Binding States. Acta Armamentarii. 2015, 36(12): 2269-2277 https://doi.org/10.3969/j.issn.1000-1093.2015.12.009

基金

国家自然科学基金项目（51303081）；江苏省自然科学基金项目（BK20130761）

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收稿日期	修回日期	出版日期
2015-02-04	2015-02-04	2015-12-31
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2016-02-02

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