CAJ | 학술논문

飞机外挂等细长体试件的两点激励振动试验方法在国内外已经开始较广泛应用。因试件动力学的复杂特性经常造成两点激励振动试验控制超差甚至无法控制，因此在试验前有必要对试件开展模态等动力学特性分析。针对某模拟外挂的试验件及试验夹具开展了有限元模态分析，在两点激励试验前对试验中容易出现控制超差的危险频率点进行了预判。随后开展的两点激励振动试验结果证明了预判的正确性以及试验前开展动力学分析的必要性。
비궤외괘등세장체시건적량점격려진동시험방법재국내외이경개시교엄범응용。인시건동역학적복잡특성경상조성량점격려진동시험공제초차심지무법공제，인차재시험전유필요대시건개전모태등동역학특성분석。침대모모의외괘적시험건급시험협구개전료유한원모태분석，재량점격려시험전대시험중용역출현공제초차적위험빈솔점진행료예판。수후개전적량점격려진동시험결과증명료예판적정학성이급시험전개전동역학분석적필요성。
Two-exciter vibration testing method has been widely used for slender specimens such as aircraft store. Due to the complicated dynamic characteristics of the specimens, two-exciter vibration test is difficult to control or the vibration control overshoot will occurred. So it is necessary to do modal analysis before two-exciter vibration test. The critical frequency points in the vibration testing control were prejudged based on modal analysis of the specimen. The results of two-exciter vibration test showed that prejudgments of critical frequency points are exact.