GUO Min(郭旻), CHAO Hong-xiao（钞红晓）, ZHANG Peng-fei（张鹏飞）, CAO Xin（曹馨）
(The Northwest Mechanical and Electrical Engineering Institute，Xianyang 712099, China)
Abstract： This paper presents a new idea for analyzing the complicated shock signal. Based on this kind of analysis, an equivalent power spectral density(PSD) chart is drawn for vibration environmental test, which is carried to test the vehicle loading instrument’s vibration behavior. The environment test is equivalent to the condition under which the vehicle and the instrument is experiencing a firing period. Exactly speaking, the short time vibration during the firing period is a complicated shock event. The paper points out the deficiency of the commonly used half sine equivalence for the shock and vibration environment test and gives the procedure of how to draw the PSD chart through the actual acceleration data.
Key words：environment test; waveform equivalence; complicated shock; power spectral density（PSD）
CLD number： TN911.6 Document code： A
Article ID： 1674-8042(2013)02-0155-03 doi： 10.3969/j.issn.1674-8042.2013.02.013
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