CAJ | 학술논문

为了研究直接粘贴应变片对推进剂装药表面应变测量的影响,通过试验研究了某双基推进剂的松弛和蠕变行为,分别获得了推进剂的应力松弛模量和蠕变应变.在获得应力松弛模量的基础上,运用有限元方法分析了应变片对测量推进剂试样表面应变在蠕变情况下的影响,并与文献中的试验数据进行了对比分析.研究表明,在短时间内应变片的测量结果有一定的精度,该研究可为接触测量方法产生误差机理及量值提供参考,并为数值计算的准确性提供试验依据.
위료연구직접점첩응변편대추진제장약표면응변측량적영향,통과시험연구료모쌍기추진제적송이화연변행위,분별획득료추진제적응력송이모량화연변응변.재획득응력송이모량적기출상,운용유한원방법분석료응변편대측량추진제시양표면응변재연변정황하적영향,병여문헌중적시험수거진행료대비분석.연구표명,재단시간내응변편적측량결과유일정적정도,해연구가위접촉측량방법산생오차궤리급량치제공삼고,병위수치계산적준학성제공시험의거.
In order to research the influence of pasting strain-gauge on measuring propellant surface strain, the relaxation and creep behavior of the double-base propellant were studied by tests. The stress relaxation modulus and creep strain were obtained respectively. The influence of strain-gauge on measuring propellant surface strain under creep conditions was analyzed by using the finite element method on the basis of obtaining stress relaxation modulus, and the obtained result was compared with the test data from the literature. The research shows that the strain- gauge measurement result has certain precision in a short time. The research offers the reference for contact measurement method producing error mechanism and value, and provides test basis for the accuracy of numerical calculation.