装备环境工程
裝備環境工程
장비배경공정
EQUIPMENT ENVIRONMENTAL ENGINEERING
2015年
2期
6-9,58
,共5页
赵怀耘%陈颖%农绍宁
趙懷耘%陳穎%農紹寧
조부운%진영%농소저
两点激励振动试验%夹具固定%柔性悬挂%细长体试件%模态特性
兩點激勵振動試驗%夾具固定%柔性懸掛%細長體試件%模態特性
량점격려진동시험%협구고정%유성현괘%세장체시건%모태특성
two-exciter vibration test%fixture fixation%flexible suspension%slender specimen%modal characteris-tics
目的：明确细长体试件最合适的两点激励试验形式。方法针对某细长体试件的不同试验形式设计了不同的试验夹具，随后针对试件和夹具开展有限元模态分析，并进行两种形式的两点激励振动试验，研究细长体试件在两点激励振动试验中采用不同试验形式时的动力学响应差异。结果模态分析和试验结果表明，试件和夹具组合体在柔性悬挂方式下依然正确反应了试件本身的模态特性，而在夹具固定方式下模态特性却发生了明显改变。结论细长体试件的两点激励振动试验更适合采用柔性悬挂方式进行。
目的：明確細長體試件最閤適的兩點激勵試驗形式。方法針對某細長體試件的不同試驗形式設計瞭不同的試驗夾具，隨後針對試件和夾具開展有限元模態分析，併進行兩種形式的兩點激勵振動試驗，研究細長體試件在兩點激勵振動試驗中採用不同試驗形式時的動力學響應差異。結果模態分析和試驗結果錶明，試件和夾具組閤體在柔性懸掛方式下依然正確反應瞭試件本身的模態特性，而在夾具固定方式下模態特性卻髮生瞭明顯改變。結論細長體試件的兩點激勵振動試驗更適閤採用柔性懸掛方式進行。
목적：명학세장체시건최합괄적량점격려시험형식。방법침대모세장체시건적불동시험형식설계료불동적시험협구，수후침대시건화협구개전유한원모태분석，병진행량충형식적량점격려진동시험，연구세장체시건재량점격려진동시험중채용불동시험형식시적동역학향응차이。결과모태분석화시험결과표명，시건화협구조합체재유성현괘방식하의연정학반응료시건본신적모태특성，이재협구고정방식하모태특성각발생료명현개변。결론세장체시건적량점격려진동시험경괄합채용유성현괘방식진행。
Objective To clarify the favorite type of the two-exciter vibration test for a slender specimen. Methods Different test fixtures were designed for different testing types of a selected slender specimen. Finite element method was used to analyze the modal characteristics of the specimen and the fixtures. Two types of two-exciter vibration test were carried out to verify the analysis and the different dynamic responses of the slender specimen in different two-exciter vibration tests were studied. Results Modal analysis and test results showed that the combination of specimen and fixture in the mode of flexible suspension correctly reflected the specimen’s intrinsic modal characteristics, while the modal characteristics were notably changed in the mode of fixture fixation. Conclusion The flexible suspension method was more suitable for the slender specimen in two-exciter vibration test.
