共查询到17条相似文献,搜索用时 93 毫秒
1.
对我国最大的DOME式600MW汽轮发电机的整机强度与振动特性作了详细地分析。用加筋壳体理论,有限元技术和模型试验技术等方法对发电机整机以及各主要部件进行了分析,理论计算与模型的实验模态分析结果的对比分析,结果证明此种形式的发电机符合设计标准,也满足美国WH公司的设计准则。 相似文献
2.
根据薄壳理论,导出轴对称载荷的回转壳有限元公式,计算了P·PDL型电站波纹管,并与试验作了对比,表明此计算方法是可行的。 相似文献
3.
4.
5.
6.
7.
8.
9.
10.
11.
Ta Na State Key Laboratory of Vibration Shock Noise Shanghai Jiaotong Univernty Shanghai Chana Qiu Jiajun Cai Ganhua School of Mechanical Engineering Tianjin University Tianjin China 《机械工程学报(英文版)》2005,18(2):302-306
Zero mode natural frequency (ZMNF) is found during experiments. The ZMNF and vibrations resulted by it are studied. First, calculating method of the ZMNF excited by electromagnetic in vibrational system of coupled mechanics and electrics are given from the view of magnetic energy. Laws that the ZMNF vanes with active power and exciting current are obtained and are verified by experiments. Then, coupled lateral and torsional vibration of rotor shaft system is studied by considering rest eccentricity, rotating eccentricity and swing eccentricity. Using Largrange-Maxwell equation when three phases are asymmetric derives differential equation of the coupled vibration. With energy method of nonlinear vibration, amplitude-frequency characteristics of resonance are studied when rotating speed of rotor equals to ZMNF. The results show that ZMNF will occur in turbine gen erators by the action of electromagnetic Because ZMNF varies with electromagnetic parameters, resonance can occur when exciting frequency of the 相似文献
12.
空气压缩机主要为汽车制动系统提供足够的气路压力,以保证汽车气刹系统安全可靠.由于空压机处于一个振动剧烈的恶劣工作环境,因此在发动机上的安装可靠性直接影响到能否正常工作,甚至影响到整个发动机乃至整车的性能.通过对空压机支架有限元计算模态分析和振动特性实验方法获取空压机支架的分析数据,来判断发动机螺栓发生断裂的原因及支架优化方向. 相似文献
13.
14.
机载雷达框架刚强度分析 总被引:1,自引:0,他引:1
针对机载雷达框架的结构形式,运用ANSYS有限元分析软件,采用板壳单元对其进行模态振动、应力场以及变形场分析,验证了产品设计的合理性,同时为产品的开发提供了科学、准确的设计依据。 相似文献
15.
16.
根据主闸阀结构特点,分别用有限元法和椭圆柱板壳理论公式计算了阀体的强度与刚度,并进行了分析对比,同时对闸板的刚度进行了校核。 相似文献