基于约束阻尼层的弧形钢闸门减振分析
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摘要
为了控制弧形钢闸门因流激荷载引起的过大振动,在闸门支臂上设置约束阻尼层减振,以保证结构的整体安全运营。首先利用模态应变能法和复模态法分析约束阻尼层的动力参数,并与精确解对比,选用复模态法计算钢闸门动力参数。基于空间有限元理论,通过模态应变能分布集度和动力计算参量,确定合理的约束阻尼层设置位置及其物理尺寸。利用精细积分法,分析了钢闸门设置约束阻尼层前后的流激荷载响应值,结果表明:约束阻尼层能有效降低闸门的流激荷载响应。研究成果为约束阻尼层在水工结构中减振设计提供了可靠的设计依据。
In order to control the excessive vibration caused by the flow induced vibration of the steel tainter gate,a constrained damping layer is arranged on the gate arm to ensure the overall safety operation of the structure. Firstly,the modal strain energy method and the complex modal method are used to analyze the dynamic parameters of the constrained damping layer by comparing the exact solution. Next,the dynamic parameters of the steel gate are calculated by the complex mode method. Based on the space finite element theory,the position and the physical size of the constrained damping layer are reasonably determined by the modal strain energy distribution and the dynamic parameters. By using precise integration method,the flow induced load of steel gate is analyzed,and the results show that the constrained damping layer can effectively reduce the flow induced load response. In this paper,the results provide a reliable design basis for constrained damping layer in hydraulic structures.
In order to control the excessive vibration caused by the flow induced vibration of the steel tainter gate,a constrained damping layer is arranged on the gate arm to ensure the overall safety operation of the structure. Firstly,the modal strain energy method and the complex modal method are used to analyze the dynamic parameters of the constrained damping layer by comparing the exact solution. Next,the dynamic parameters of the steel gate are calculated by the complex mode method. Based on the space finite element theory,the position and the physical size of the constrained damping layer are reasonably determined by the modal strain energy distribution and the dynamic parameters. By using precise integration method,the flow induced load of steel gate is analyzed,and the results show that the constrained damping layer can effectively reduce the flow induced load response. In this paper,the results provide a reliable design basis for constrained damping layer in hydraulic structures.
引文
[1] Abela Christopher M. Comparison of retrofits for three strut-arm tainter gates using a longevity corrosion maintenance factor[J]. Practice Periodical on Structural Design and Construction,2014,19(4):201-233.
[2] Anami Keiko,Knisely Charles,Ishii Noriaki,et al. Field measurement of dynamic instability of a 50-ton tainter-gate[J]. Proceedings of the ASME Pressure Vessels and Piping Conference-Fluid-Structure Interaction,2008,10:449-454.
[3] Anami K,Ishii N,Knisely C W. Pressure induced by vertical planar and inclined curved weir-plates undergoing streamwise rotational vibration[J]. Journal of Fluids and Structures,2012,29:35-49.
[4]严根华.水工闸门自激励实例及其防治措施[J].振动、测试与诊断,2013,33(2):203-208.
[5]熊润娥,严根华.水工闸门止水结构动力特性与体型优化[J].振动、测试与诊断,2011,31(6):798-802.
[6]谭显文,王正中.高水头止水材料超弹性与黏弹性本狗研究[J].振动与冲击,2014,33(19):97-104.
[7]严根华,赵宁.水工平面闸门结构的抗震设计[J].振动、测试与诊断,2013,33(2):199-202.
[8]严根华,陈发展.曹娥江大闸工作闸门流激振动及抗震优化研究[J].固体力学学报,2011,32(1):439-449.
[9] J B Kosmatka,S L Liguore. Review of methods for analyzing constrained-layer damped structures[J]. Journal of aerospace engineering,1993,6(3):268-283.
[10]杨靖波,华旭刚,陈政清,等.约束阻尼层在输电塔风振控制中的应用[J].振动工程学报学报,2010,23(4):389-396.
[11] Abdulhadi F. Transverse vibration of laminated plates with viscoelastic layer damping[J]. Shock and Vibration Bull,1969,40(5),93-104.
[12]李火坤.泄流结构耦合动力分析与工作性态识别方法研究[D].天津:天津大学,2008:2-6.
[2] Anami Keiko,Knisely Charles,Ishii Noriaki,et al. Field measurement of dynamic instability of a 50-ton tainter-gate[J]. Proceedings of the ASME Pressure Vessels and Piping Conference-Fluid-Structure Interaction,2008,10:449-454.
[3] Anami K,Ishii N,Knisely C W. Pressure induced by vertical planar and inclined curved weir-plates undergoing streamwise rotational vibration[J]. Journal of Fluids and Structures,2012,29:35-49.
[4]严根华.水工闸门自激励实例及其防治措施[J].振动、测试与诊断,2013,33(2):203-208.
[5]熊润娥,严根华.水工闸门止水结构动力特性与体型优化[J].振动、测试与诊断,2011,31(6):798-802.
[6]谭显文,王正中.高水头止水材料超弹性与黏弹性本狗研究[J].振动与冲击,2014,33(19):97-104.
[7]严根华,赵宁.水工平面闸门结构的抗震设计[J].振动、测试与诊断,2013,33(2):199-202.
[8]严根华,陈发展.曹娥江大闸工作闸门流激振动及抗震优化研究[J].固体力学学报,2011,32(1):439-449.
[9] J B Kosmatka,S L Liguore. Review of methods for analyzing constrained-layer damped structures[J]. Journal of aerospace engineering,1993,6(3):268-283.
[10]杨靖波,华旭刚,陈政清,等.约束阻尼层在输电塔风振控制中的应用[J].振动工程学报学报,2010,23(4):389-396.
[11] Abdulhadi F. Transverse vibration of laminated plates with viscoelastic layer damping[J]. Shock and Vibration Bull,1969,40(5),93-104.
[12]李火坤.泄流结构耦合动力分析与工作性态识别方法研究[D].天津:天津大学,2008:2-6.