大跨度斜拉桥拉索涡激振动及其控制的研究
发布时间：2018-09-18 12:35
【摘要】：随着国家交通事业的发展，斜拉桥在大跨度桥梁中得到了越来越多的应用。但在工程实际运用中，拉索振动问题是大跨度斜拉桥在工程中不可避免也亟待解决的问题。 工程中，通过改变斜拉索的表面形状或者把单索相互连接，组成具有较高频率的索网，可以很好的抑制拉索的振动。但这两种方法破坏了原斜拉桥拉索的立面美学效果，故在实际中应用较少。 在桥面和斜拉索之间设置机械阻尼器的方法已经被广泛应用于抑制拉索的振动。但是，由于受阻尼器安装位置的影响，机械阻尼器的减振效率远难达到理论值；拉索发生振动时一般是多模态的振动，机械阻尼器只能抑制某一阶模态的振动。使用磁流变液阻尼器对拉索进行半主动控制，为此种问题提供了一种新的解决途径。 本文对斜拉桥拉索的涡激振动及控制进行了研究，，主要内容有： （1）通过对涡激振动的模型进行分析，选取适宜涡激模型运用于本文拉索涡激振动控制的研究。对所选模型进行无控条件下拉索涡激振动的模拟分析。通过分析，选取合适的工况条件，进行拉索的涡激振动控制的模拟和分析。 （2）通过拉索涡激振动的运动方程和状态方程，对拉索涡激振动进行了被动控制的仿真。在被动控制中，分析了线性粘滞阻尼器安装位置处的拉索的锁紧现象和不同粘滞系数对斜拉桥拉索涡激振动控制效果的影响。 （3）对拉索涡激振动进行主动控制的模拟。通过分析不同参数，得到拉索涡激振动主动控制的控制效果。 （4）以斜拉索涡激振动中的主动控制的效果为目标，按照主动变阻尼算法简单Bang-Bang控制算法对拉索进行涡激振动的半主动控制模拟分析。
[Abstract]:With the development of national transportation, cable-stayed bridges have been applied more and more in long span bridges. However, in engineering practice, cable vibration is an inevitable and urgent problem for long span cable-stayed bridges. In engineering, by changing the surface shape of the stay cable or connecting the single cable to each other to form a cable network with higher frequency, the vibration of the cable can be suppressed very well. However, these two methods destroy the facade aesthetic effect of the original cable-stayed bridge cable, so they are seldom used in practice. The method of installing mechanical dampers between the bridge deck and the cable has been widely used to suppress the vibration of the cables. However, due to the influence of the damper installation position, the damping efficiency of mechanical damper is far from the theoretical value. When cable vibration occurs, it is usually multi-modal vibration, and mechanical damper can only suppress the vibration of a certain mode. The magneto-rheological fluid damper is used to control the cable semi-actively, which provides a new way to solve the problem. In this paper, the vortex-induced vibration and control of cable-stayed bridge cables are studied. The main contents are as follows: (1) through the analysis of the model of vortex-induced vibration, the suitable vortex-induced model is selected to be applied to the control of the vortex-induced vibration of cable in this paper. The model is simulated and analyzed under uncontrolled conditions. Through the analysis, the suitable working conditions are selected to simulate and analyze the vortex-induced vibration control of the cables. (2) through the equations of motion and state of the vortex-induced vibration of the cables, the passive control simulation of the vortex-induced vibration of the cables is carried out. In the passive control, the locking phenomenon of the cable at the installation position of the linear viscous damper and the influence of different viscosity coefficients on the control effect of the vortex-induced vibration of the stayed cable of the cable-stayed bridge are analyzed. (3) the active control of the vortex-induced vibration of the cable is simulated. By analyzing different parameters, the active control effect of vortex-induced vibration of cable is obtained. (4) the effect of active control in vortex-induced vibration of stay cable is taken as the target. According to the simple Bang-Bang control algorithm of the active variable damping algorithm, the semi-active control simulation of the vortex-induced vibration of the cable is carried out.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U441.3;U448.27
[Abstract]:With the development of national transportation, cable-stayed bridges have been applied more and more in long span bridges. However, in engineering practice, cable vibration is an inevitable and urgent problem for long span cable-stayed bridges. In engineering, by changing the surface shape of the stay cable or connecting the single cable to each other to form a cable network with higher frequency, the vibration of the cable can be suppressed very well. However, these two methods destroy the facade aesthetic effect of the original cable-stayed bridge cable, so they are seldom used in practice. The method of installing mechanical dampers between the bridge deck and the cable has been widely used to suppress the vibration of the cables. However, due to the influence of the damper installation position, the damping efficiency of mechanical damper is far from the theoretical value. When cable vibration occurs, it is usually multi-modal vibration, and mechanical damper can only suppress the vibration of a certain mode. The magneto-rheological fluid damper is used to control the cable semi-actively, which provides a new way to solve the problem. In this paper, the vortex-induced vibration and control of cable-stayed bridge cables are studied. The main contents are as follows: (1) through the analysis of the model of vortex-induced vibration, the suitable vortex-induced model is selected to be applied to the control of the vortex-induced vibration of cable in this paper. The model is simulated and analyzed under uncontrolled conditions. Through the analysis, the suitable working conditions are selected to simulate and analyze the vortex-induced vibration control of the cables. (2) through the equations of motion and state of the vortex-induced vibration of the cables, the passive control simulation of the vortex-induced vibration of the cables is carried out. In the passive control, the locking phenomenon of the cable at the installation position of the linear viscous damper and the influence of different viscosity coefficients on the control effect of the vortex-induced vibration of the stayed cable of the cable-stayed bridge are analyzed. (3) the active control of the vortex-induced vibration of the cable is simulated. By analyzing different parameters, the active control effect of vortex-induced vibration of cable is obtained. (4) the effect of active control in vortex-induced vibration of stay cable is taken as the target. According to the simple Bang-Bang control algorithm of the active variable damping algorithm, the semi-active control simulation of the vortex-induced vibration of the cable is carried out.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U441.3;U448.27
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相关期刊论文 前8条
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3 邬U喕
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