Sentence examples for impact hammer method from inspiring English sources

The impact hammer method is not reliable for the frequencies less than 50 Hz.

Open image in new window Fig. 4 Track stiffness measurement using the impact hammer method.

Typically, the impact hammer method can cover a frequency interval of 50 1,500 Hz, which depends on the material of the hammer head [32].

The standstill measurement of track stiffness can be performed with the traditional jack-loading method, impact hammer method, FWD (falling weight deflectometer) method, and track loading vehicle method.

In the impact hammer method, the track vibration is measured with acceleration transducers installed on rail or sleepers (track plates) after an impulse load is exerted on the track with an impact hammer.

The overall track stiffness, generally, can be measured based on four methods: (1) traditional hydraulic jack-loading method [1, 2], (2) impact hammer method [25, 26], (3) FWD method [9, 27], and (4) TLV method [2, 5, 28, 29, 30, 31].

Mineral soil samples were collected on a systematic grid of twelve points across the plot (although sometimes conditions required collecting fewer cores), with a slide impact hammer corer following the methods used by the US Forest Service Forest Inventory and Analysis Program [29].

Mineral soil samples were collected on a systematic grid of twelve points across the plot (although sometimes conditions required collecting fewer cores), with a slide impact hammer corer following the methods used by the US Forest Service Forest Inventory and Analysis Program [ 29].

The proposed method was experimentally verified through impact hammer loading tests on a planar steel moment frame.

Several non-fixed methods exist to perform this task: impact hammer, electro-magnetic, acoustic and laser excitation.

In order to assess the proposed method, a three-story laboratory frame is tested by impact hammer modal testing.