论折叠摆对地壳振动的响应特性  

RESEARCH ON CHARACTERISTIC OF FOLDED PENDULUM RESPONSE TO CRUSTAL VIBRATION

作　　者：范淑华[1] 吴书朝[1] 罗俊[1] 

机构地区：[1]华中理工大学物理系

出　　处：《地壳形变与地震》1997年第2期41-47,共7页Crustal Deformation and Earthquake

基　　金：国家杰出青年科学基金

摘　　要：通过简化的折叠摆模型，深入研究了折叠摆对地壳振动的响应特性。理论分析表明，折叠摆不仅对地倾斜固体潮的响应非常灵敏，而且具有明显的抗外界振动干扰的能力。如果采用精密红外位移传感和负反馈控制技术，折叠摆测量倾斜潮的灵敏度可望达到１０－１０ｒａｄ。The folded pendulum discussed in this paper is made of a positive pendulum and an inverted pendulum. Due to the negative force constant of the inverted pendulum offsetting the positive force constant of the positive pendulum, the natural frequency of the system could be extremely decreased and the equivalent length be easily increased to 1km. In this paper, the design of a folded pendulum is presented and the characteristic of the folded pendulum response to the crustal vibration is also discussed. If the folded pendulum is used to measure the ground tilt tides, theoretical analysis and numerical estimation show that the sensibility could reach 10 -10 rad, which is about 2 orders higher than that of the traditional level pendulum.

关 键 词：固体潮 折叠摆 响应特性 地震预报 地壳运动 

分 类 号：P315.7[天文地球—地震学] P553[天文地球—固体地球物理学]