实索振动试验中最低测点位置的初步研究

Research on the lowest location of the measuring point in cable vibration test

利用有限元结合虚拟激励法,通过自行编制的程序计算了在索端外界白噪声激励下索的端部、八分点、四分点、跨中点的加速度谱,并依此给出了拉索测点布置的一些规律,通过一个实索试验验证了理论分析的正确性。

In this paper, aided by the finite element theory and pseudo-excitation method, a program is developed to calculate the acceleration power spectral density at the anchorage, eight-point, quarter-point and mid-point which is excited by the white noise at the anchorage. And the regulation how to arrange sensors is discussed according to the figures. A test on the real cable is introduced to prove the theory analysis.