摘要
基于LMS Virtual.Lab多体动力学仿真平台,建立了某型直升机起落架虚拟静力试验方法。基于修正的Craig-Bampton固定界面模态综合法,通过求解各构件的Craig-Bampton模态信息,建立了直升机起落架试验系统的刚柔耦合动力学模型。通过动力学仿真,分析了不同工况下监测点位移随载荷变化规律,考察了夹具柔性对仿真结果的影响。仿真结果表明:对虚拟静力试验系统中的与起落架直接连接夹具加以柔性化处理,其起落架结构的最大位移与试验结果吻合较好;夹具柔性对仿真结果有较大影响。
Based on the simulating plate of LMS Virtual Lab a Virtual static test methods of landing gear is proposed. Based on the modified Craig- Bampton fixed interface modal synthesis method, by solving various components Craig- Bampton modal information, flexible coupling dynamics model of a helicopter landing gear test system is established. By dynamic simulation the model , the loaddisplacement change rule of monitoring point under the different situation is analyzed, the influence of fixture flexible on the simulation results is analyzed. The simulation result show that： flexible processing the fixtures which direct connected with the landing gear in virtual test system, the maximum displacement of the landing gear are well consistent with the test results ; flexibility of fixtures have non- negligible impact on the simulation results.
出处
《航空计算技术》
2013年第2期33-36,共4页
Aeronautical Computing Technique
基金
国家自然科学基金项目资助(51075203)
江苏高校优势学科建设工程项目资助
