Acceleration and strain data for free vibration of pre-tensioned, partially-submerged beams

The data provided herein is accelerometer and strain data taken from free vibration response of pre-tensioned, partially submerged steel beam specimens (modulus of elasticity assumed = 29,000 ksi). The specimens were subjected to various levels of pre-tension, and various levels of submersion in water. The purpose of the testing was to quantify the effects of partial submersion on the vibrating frequencies of pretensioned beams. Three specimens were tested, each with different cross section (but identical cross-sectional area). The different cross sections allow investigation of the effects of specimen width as the specimen vibrates through water. The testing procedure was as follows: 1) Apply a specified level of tension in the beam. Measure tension via 3 strain gages. 2) Submerge the specimens to a specified depth of water 3) Excite the beams with either a hammer impact or a pull-and-release method (physically pull the middle of the bar and quickly release) 4) Measure the free vibration of the beam with 2 accelerometers. Schematic drawings of the test setup and the test specimens are provided, as is a picture of the test setup.

本数据集包含从预应力、部分浸入水中的钢梁试样（弹性模量假设为29,000 ksi）的自由振动响应中采集的加速度计和应变数据。试样经历了不同级别的预应力和不同深度的水浸。测试的目的是量化部分浸入对预应力梁振动频率的影响。共测试了三个试样，每个试样具有不同的横截面（但横截面积相同）。不同的横截面允许研究试样宽度在试样通过水振动时的效应。测试程序如下：1）在梁上施加指定级别的张力。通过3个应变片测量张力。2）将试样浸入到指定深度的水中。3）通过锤击或拉-释放方法（物理拉起棒的中间部分并迅速释放）激发梁。4）使用2个加速度计测量梁的自由振动。提供了测试设置和测试试样的示意图，以及测试设置的照片。