Characteristic period is an important parameter of the seismic design response spectrum. There is important theoretical significance and engineering application value to the study of the characteristic period of seism...Characteristic period is an important parameter of the seismic design response spectrum. There is important theoretical significance and engineering application value to the study of the characteristic period of seismic design response spectrum of ultra high voltage （UHV） electrical equipment. In this paper, 1448 horizontal earthquake records within the world scope including the United States and Japan for Site Class m were analyzed. Results show that both magnitude and epicentral distance have great influence on the characteristic period. About 80 % of characteristic periods of strong earthquake records are about 0. 9s. Statistical analysis was conducted on the seismic hazard assessment results of 312 projects of China in recent years, and it is found that about 70 % of characteristic periods are about 0. 9s. Combined with the related code comparison and analysis, it is suggested that the characteristic period of the seismic design response spectrmn of UHV electrical equipment should select 0. 9s in order to effectively guarantee the seismic safety of UHV electrical equipment.展开更多
Several procedures for non-linear static and dynamic analysis of structures have been developed in recent years. In this paper, the response spectrum analysis is performed on two different shapes i.e. regular and irre...Several procedures for non-linear static and dynamic analysis of structures have been developed in recent years. In this paper, the response spectrum analysis is performed on two different shapes i.e. regular and irregular shape of structure by using STAAD PRO. And the comparison results are studied and compared accounting for the earthquake characteristics and the structure dynamic characteristics. As the results show that the earthquake response peak values and the main response frequencies are very close and comparable. It can be referred to by the engineering applications.展开更多
The reflecting Schmidt plate system of the large sky area multi-object fiberspectroscopic telescope (LAMOST) serves active optical correction with a reflecting surface ofsegmented mirror. An azimuth-altitude mounting ...The reflecting Schmidt plate system of the large sky area multi-object fiberspectroscopic telescope (LAMOST) serves active optical correction with a reflecting surface ofsegmented mirror. An azimuth-altitude mounting is adopted with two self-aligning ball bearings foraltitude axis and hydrostatic bearings for azimuth. With static and modal analyses, finite elementmodeling of the full Schmidt plate system is discussed. Conventional seismic response spectrum hasbeen adapted for particular application for telescope engineering before a seismic response spectrumanalysis is performed, and results have confirmed that the design of the reflecting Schmidt platemanifests good performance and can survive the seismic intensity of up to 7 magnitude specified bytechnical requirements.展开更多
基金founded by the Earthquake Science and Technology Spark Plan of China(XH12063)
文摘Characteristic period is an important parameter of the seismic design response spectrum. There is important theoretical significance and engineering application value to the study of the characteristic period of seismic design response spectrum of ultra high voltage （UHV） electrical equipment. In this paper, 1448 horizontal earthquake records within the world scope including the United States and Japan for Site Class m were analyzed. Results show that both magnitude and epicentral distance have great influence on the characteristic period. About 80 % of characteristic periods of strong earthquake records are about 0. 9s. Statistical analysis was conducted on the seismic hazard assessment results of 312 projects of China in recent years, and it is found that about 70 % of characteristic periods are about 0. 9s. Combined with the related code comparison and analysis, it is suggested that the characteristic period of the seismic design response spectrmn of UHV electrical equipment should select 0. 9s in order to effectively guarantee the seismic safety of UHV electrical equipment.
文摘Several procedures for non-linear static and dynamic analysis of structures have been developed in recent years. In this paper, the response spectrum analysis is performed on two different shapes i.e. regular and irregular shape of structure by using STAAD PRO. And the comparison results are studied and compared accounting for the earthquake characteristics and the structure dynamic characteristics. As the results show that the earthquake response peak values and the main response frequencies are very close and comparable. It can be referred to by the engineering applications.
基金This project is supported by National Key Project of China
文摘The reflecting Schmidt plate system of the large sky area multi-object fiberspectroscopic telescope (LAMOST) serves active optical correction with a reflecting surface ofsegmented mirror. An azimuth-altitude mounting is adopted with two self-aligning ball bearings foraltitude axis and hydrostatic bearings for azimuth. With static and modal analyses, finite elementmodeling of the full Schmidt plate system is discussed. Conventional seismic response spectrum hasbeen adapted for particular application for telescope engineering before a seismic response spectrumanalysis is performed, and results have confirmed that the design of the reflecting Schmidt platemanifests good performance and can survive the seismic intensity of up to 7 magnitude specified bytechnical requirements.
