非平稳台风-桥分析系统
发布时间：2018-08-28 08:19
【摘要】：从风场模拟、验证和荷载处理3个方面考虑台风非平稳特性,构建了台风-桥分析系统。构建了台风风场模拟验证系统方法,基于非平稳风速模拟方法建立台风风场模拟方法,并引入非均匀调制进化谱对模拟风场进行验证;基于良态风荷载处理方法,建立了台风荷载处理方法,并采用APDL语言进行ANSYS二次开发,建立台风-桥时域分析系统;采用建立的分析系统对台风作用下某斜拉桥桥梁响应进行分析。结果表明,模拟功率谱和验证进化谱吻合良好,提出的台风风场模拟和验证系统方法合理有效;模拟台风风速与台风作用下的桥梁响应时程曲线均与时变平均风速变化趋势相同,且波动幅度随时变平均风速的减小而减小;基于平稳特性经典风谱直接对台风风场进行模拟不合适。
[Abstract]:The typhoon bridge analysis system is constructed from the wind field simulation, verification and load treatment, considering the non-stationary characteristics of the typhoon. Based on the non-stationary wind velocity simulation method, the typhoon wind field simulation method is established, and the non-uniform modulation evolution spectrum is introduced to verify the simulated wind field. The method of typhoon load treatment is established, and the time domain analysis system of typhoon bridge is established by using APDL language for ANSYS secondary development, and the response of a cable-stayed bridge under typhoon action is analyzed by the established analysis system. The results show that the simulated power spectrum is in good agreement with the verification evolutionary spectrum, and the proposed simulation and verification system for typhoon wind field is reasonable and effective. The time history curve of bridge response under typhoon wind speed and typhoon action is the same as that of time-varying average wind speed, and the fluctuation amplitude decreases with the decrease of mean wind speed at any time. It is not suitable to simulate typhoon wind field directly based on the classical wind spectrum.
【作者单位】： 长安大学公路学院;
【基金】：国家自然科学基金青年基金项目(51408053) 中央高校基本科研业务费专项(310821171002)
【分类号】：U441.2
，
本文编号：2208825
[Abstract]:The typhoon bridge analysis system is constructed from the wind field simulation, verification and load treatment, considering the non-stationary characteristics of the typhoon. Based on the non-stationary wind velocity simulation method, the typhoon wind field simulation method is established, and the non-uniform modulation evolution spectrum is introduced to verify the simulated wind field. The method of typhoon load treatment is established, and the time domain analysis system of typhoon bridge is established by using APDL language for ANSYS secondary development, and the response of a cable-stayed bridge under typhoon action is analyzed by the established analysis system. The results show that the simulated power spectrum is in good agreement with the verification evolutionary spectrum, and the proposed simulation and verification system for typhoon wind field is reasonable and effective. The time history curve of bridge response under typhoon wind speed and typhoon action is the same as that of time-varying average wind speed, and the fluctuation amplitude decreases with the decrease of mean wind speed at any time. It is not suitable to simulate typhoon wind field directly based on the classical wind spectrum.
【作者单位】： 长安大学公路学院;
【基金】：国家自然科学基金青年基金项目(51408053) 中央高校基本科研业务费专项(310821171002)
【分类号】：U441.2
，
本文编号：2208825
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