摘要
进行了带有调整系统的远铰解耦挂架抑制机翼/外挂颤振的低速风洞试验研究.试验是在大展弦比机翼颤振模型上进行的.试验结果表明:当外挂俯仰频率落在柔性区范围时,机翼/远铰解耦挂架/外挂的颤振速度比机翼/常规挂架/外挂的颤振速度有显著提高;且其颤振速度对外挂惯性特性的变化不敏感.试验结果还表明;调整系统可将外挂与机翼的相对静偏移修正到很小的设计角度内.文中还进行了单铰和远铰两种解耦挂架方案颤振抑制效果的比较,试验结果表明:远铰方案中外挂俯仰振动加速度响应比单铰时明显减小;且调整电机启动频率也比单铰时为低.文中还讨论了远铰挂架四连杆机构参数对外挂俯仰频率的影响.
A study on low speed wind tunnel test of wing/store flutter suppressed by remote pivot decoupler pylon with alignment system is carried out.The tests are conducted on a wing model with large aspect ratio. The test results show that the flutters speed of the wing/remote pivot decoupler pylon/store is much higher than that of the wing/conventional pylon/store and is insensitive to the variation of the store inertia when the store pitch frequency lies in the soft region. The test results also show that the alignment system can adjust the static store deflections ralative to the wing into a very small design range. The paper also compares the flutter suppression effect of the remote pivot pylon with that of the single pivot pylon. Furthermore the test results show that the remote pivot pylon has substantially smaller store acceleration response and remote pivot pylon requires less frequent activation of its alignment system than does a single pivot pylon. The influence of the parameters of four-linkage in remote pivot pylon on store pitch frequency is discussed. The results of theoretical calculation are in good agreement with those of the test.
出处
《振动工程学报》
EI
CSCD
1991年第1期1-7,共7页
Journal of Vibration Engineering
基金
航空科学基金
关键词
风洞试验
解耦
挂架
颤振试验
flutter test
decoupling
wind tunnel tests
decoupler pylon
remote pivot decoupler pylon
single pivot
