砰击作用下船用铝合金板架的瞬态动力响应参数分析
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摘要
为了分析铝合金板架结构对砰击载荷的响应规律及确定计算参数,以某船用铝合金板架为研究对象,运用Patran/Nastran进行非线性瞬态响应分析,首先分析了阻尼效应和应变率效应,之后将试验得到的真实砰击载荷简化为Ochi提出的三角形砰击载荷,最后分析了峰值出现时间和连续砰击次数对板架瞬态响应的影响。仿真结果表明:在铝合金板架瞬态响应计算中,材料的阻尼和应变率可以不考虑;峰值出现时间越早,板架变形越大;板架变形随着砰击次数的增加而增大,但在第3次后趋于稳定。本文得到的结果可为铝合金质船体结构的砰击动力响应分析提供参考。
In order to analyze the dynamic response law of Aluminum Alloy Aluminum Alloy plate frame structure under slamming loads, and determine the parameters in the calculation, using a ship Aluminum Alloy plate frame as the research object, using Patran/Nastran nonlinear transient response analysis, firstly analyzes the damping effect and strain rate effect, after that, the actual slamming load is simplified as a triangular slamming load proposed by Ochi. Finally, the influence of the peak emergence time and the number of consecutive slamming on the transient response of the frame is analyzed.The simulation results show that in the Aluminum Alloy plate frame transient response calculation, material damping and strain rate have little influence;The peak time is early, the greater the deformation of plate frame;And frame deformation increases with the number of impact, but tends to be stable after the third. The results obtained in this paper can be used as a reference for slamming dynamic response analysis of aluminum alloy hull structures.
In order to analyze the dynamic response law of Aluminum Alloy Aluminum Alloy plate frame structure under slamming loads, and determine the parameters in the calculation, using a ship Aluminum Alloy plate frame as the research object, using Patran/Nastran nonlinear transient response analysis, firstly analyzes the damping effect and strain rate effect, after that, the actual slamming load is simplified as a triangular slamming load proposed by Ochi. Finally, the influence of the peak emergence time and the number of consecutive slamming on the transient response of the frame is analyzed.The simulation results show that in the Aluminum Alloy plate frame transient response calculation, material damping and strain rate have little influence;The peak time is early, the greater the deformation of plate frame;And frame deformation increases with the number of impact, but tends to be stable after the third. The results obtained in this paper can be used as a reference for slamming dynamic response analysis of aluminum alloy hull structures.
引文
[1]高宁,朱志武.5083铝合金宽应变率实验与基于损伤的本构模型研究[J].高压物理学报,2017(1):51-60.
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[13]OCHI M.K,MOTTER L.E Prediction of slamming characteristics and hull responses for ship design[J].Transactions SNAME,1973,81:144-177.
[2]MARCINB C,STANISZEWSKI.Simulation of tri-axially braided composites half-cylinder behavior during balistic impact[J].Anesthesiology,2007,94(5):790-792.2007.
[3]夏齐强,陈志坚.波浪载荷与砰击载荷联合作用下SWATH船结构动态响应[J].上海交通大学学报,2012(3):352-357.
[4]邹勇,张佳宁,郑镜华,等.砰击载荷对大型铝合金船舶结构强度的影响[J].大连海事大学学报,2014(1):45-48.
[5]ROBERT K GOLDBERG,BRINA J BLINZLER,WIESLAWK.BINIENDA.Modification of a macromechanical finite element-based model for impact analysis of triaxially braided composites[J].Journal of Aerospace Engineering,2012,25(3):383-394.
[6]王誉瑾,钱宏亮,范峰.结构用铝合金6082-T6材料本构关系及力学参数试验研究[J].工程力学,2013(S1):309-313+319.
[7]张世联,王能扬,肖熙.砰击载荷作用下板结构动力响应的参数分析[J].上海交通大学学报,2001(4):562-564.
[8]杨旭东,张世联.有限元分析结构瞬态响应中的结构阻尼问题[J].中国海洋平台,2004(2):32-36.
[9]张云峰.6082-T6铝合金材料力学性能研究[J].科技创新与应用,2016(33):5-6.
[10]任慧龙,翟帅帅,于鹏垚,等.砰击载荷作用下船艏结构瞬态响应研究[J].中国舰船研究,2013(6):14-19.
[11]戴仰山,沈进威,宋竞正.船舶波浪载荷[M].北京:国防工业出版社,2007.
[12]祝伟,刘敬喜.爆炸冲击载荷下加筋板塑性动力响应分析[J].船海工程,2011(6):28-30.
[13]OCHI M.K,MOTTER L.E Prediction of slamming characteristics and hull responses for ship design[J].Transactions SNAME,1973,81:144-177.