求翻译：需要确定基础振动模式自然频率，重点分析结构的固有频率、振型以及在地震载荷作用下的动态性能，避免发生共振现象，确保装置安全、可靠运行。是什么意思？

Need to determine the natural frequency of vibration mode basis, focusing on analysis of the structure of the natural frequencies, mode shapes and dynamic seismic performance under load, to avoid resonance phenomena, to ensure device security, reliable operation.

正在翻译，请等待...

Needs to determine the foundation vibration pattern free frequency, the key analysis structure natural frequency, inspires as well as under the earthquake load function dynamic performance, avoids having the resonance effect, guarantees the equipment safely, the reliable movement.

Need to determine the underlying natural frequency of vibration mode, focusing on analysis of inherent frequency and vibration mode of the structure and dynamic performance of seismic loading to avoid resonance phenomena, ensure safe and reliable operation.

Need to determine the natural frequency of vibration mode basis, focusing on analysis of the structure of the natural frequencies, mode shapes and dynamic seismic performance under load, to avoid resonance phenomena, to ensure device security, reliable operation.