CAJ | 학술논문

风洞试验在高超声速一体化飞行器研究过程中发挥着无法替代的作用，其中天平测力是风洞试验的关键技术。脉冲燃烧风洞试验的时间短、冲击载荷大。试验过程中，模型系统会产生强烈的振动，影响天平的测力精度，因而需对其进行动力性能的研究。由此，首先针对测力天平进行结构动力学建模，获得天平的动力学方程。通过仿真分析和锤击试验对测力天平的模态参数进行了计算和测定，然后将计算结果和试验结果进行对比分析，并解析两者的差异及产生的可能原因。理论和实验的全过程表明了测力天平的模态特性能够予以确认，同时也为试验模型系统结构动力学的进一步研究提供了有价值的依据。
풍동시험재고초성속일체화비행기연구과정중발휘착무법체대적작용，기중천평측력시풍동시험적관건기술。맥충연소풍동시험적시간단、충격재하대。시험과정중，모형계통회산생강렬적진동，영향천평적측력정도，인이수대기진행동력성능적연구。유차，수선침대측력천평진행결구동역학건모，획득천평적동역학방정。통과방진분석화추격시험대측력천평적모태삼수진행료계산화측정，연후장계산결과화시험결과진행대비분석，병해석량자적차이급산생적가능원인。이론화실험적전과정표명료측력천평적모태특성능구여이학인，동시야위시험모형계통결구동역학적진일보연구제공료유개치적의거。
;Wind tunnel experiment plays an extremely important role in the study of hypersonic integrated aircraft. One of the most important tasks is to measure the aerodynamic load with the force balance. Since the short effective measurement time and the large impulsive load for the impulse combustion testing in wind tunnel, model system will vibrate intensively during the experiment, which will reduce the accuracy of force testing. The structural dynamic study of the force balance is extremely necessary. In this paper, the structural dynamics model of the balance was constructed based on the classical dy-namics equation. Then, the modals parameters were simulated and measured with hammering test. The causes of the differ-ence between simulation modals and experimental modals were analyzed. All the work shows that the modal property of the force balance is able to be determined. This work has provided a basis for structural dynamics study of the model system.