水工弧形闸门流激振动分析
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摘要
采用模型试验和数值模拟相结合的方法,分析和评价了水工弧形闸门的流激振动.在水力模型试验中,采用自制面压力量测装置,同步测量了各面脉动压力的历时过程,避免了点压力到面压力的转换.同时,将试验得到的脉动压力作为荷载过程,应用AN SY S软件计算了在各种开度下闸门的振动反应过程.结合工程实例分析研究发现弧形闸门在有水和无水时的自振特性不同,流场对闸门自振特性的影响较大,闸门在不同开度下自振频率略有变化.
The methodology of combining the physical and numerical models is employed to evaluate the flow-induced vibration of a hydraulic radial gate.The fluctuating force acting on the element of flow-gate interface,instead of that at a point,is surveyed with the newly developed equipment.The durations of fluctuating force acting on all elements are synchronistically measured.Meanwhile,the software,ANSYS,is used to compute the dynamic response durations of the gate at different openings on which the fluctuating force acting is measured.The properties of the natural vibration is different for the radial gate under the conditions with and without flow field,so that the effect of the flow on the gate vibration should be considered.The variation of the model property of the radial gate with the gate opening is discussed.
The methodology of combining the physical and numerical models is employed to evaluate the flow-induced vibration of a hydraulic radial gate.The fluctuating force acting on the element of flow-gate interface,instead of that at a point,is surveyed with the newly developed equipment.The durations of fluctuating force acting on all elements are synchronistically measured.Meanwhile,the software,ANSYS,is used to compute the dynamic response durations of the gate at different openings on which the fluctuating force acting is measured.The properties of the natural vibration is different for the radial gate under the conditions with and without flow field,so that the effect of the flow on the gate vibration should be considered.The variation of the model property of the radial gate with the gate opening is discussed.
引文
[1]黄廷璞,危玢.我国低水头弧形闸门失事调查和初步分析[J].金属结构,1986(2):18-26.
[2]NAUDA SCHER E,ROCKW ELL D.O sc illator-m ode l approach to the iden tification and assessm en tof flow-induced v ibration in a system[J].J H ydrau lR es IAHR,1980,18(1):32-24.
[3]NAUDA SCHER E.F low-induced load ing andv ibration of gates[A].In ternationa l Sym posium onH ydrau lics of H igh D am s[C].B e ijing:[s n],1981.1-18.
[4]阎诗武.泄水工程水力学[A].脉动与震动[M].长春:吉林科学技术出版社,2000.165-217.
[5]严根华,阎诗武.水工弧形闸门的水弹性耦合自振特性研究[J].水利学报,1990(7):49-55.
[6]阎诗武,严根华,蒋梁,等.偏心铰弧形闸门的流激振动[J].水利水运科学研究,1995(4):363-372.
[7]倪汉根.平板闸门振动中的两个问题[J].大连工学院学刊,1964(4):37-53.
[8]肖天铎,钱.各型二元挡水板或墙上的地震动水压力[J].水利学报,1980(2):1-13.
[2]NAUDA SCHER E,ROCKW ELL D.O sc illator-m ode l approach to the iden tification and assessm en tof flow-induced v ibration in a system[J].J H ydrau lR es IAHR,1980,18(1):32-24.
[3]NAUDA SCHER E.F low-induced load ing andv ibration of gates[A].In ternationa l Sym posium onH ydrau lics of H igh D am s[C].B e ijing:[s n],1981.1-18.
[4]阎诗武.泄水工程水力学[A].脉动与震动[M].长春:吉林科学技术出版社,2000.165-217.
[5]严根华,阎诗武.水工弧形闸门的水弹性耦合自振特性研究[J].水利学报,1990(7):49-55.
[6]阎诗武,严根华,蒋梁,等.偏心铰弧形闸门的流激振动[J].水利水运科学研究,1995(4):363-372.
[7]倪汉根.平板闸门振动中的两个问题[J].大连工学院学刊,1964(4):37-53.
[8]肖天铎,钱.各型二元挡水板或墙上的地震动水压力[J].水利学报,1980(2):1-13.
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