Taking a subsea collet connector as an example, the contact characteristics of sealing structure under thermal–structural coupling were studied. Considering heat transfer problem in deep water, model seawater layer between structures was established, and relationship equivalent thermal conductivity, composite coefficient, temperature determined. The steady-state field distribution action intern...

The research aims to develop a seed drill for precise seeding on ridge with drip irrigation. basic principles and methods of classical mechanics, mathematical analysis, statistics were used in this study. existing technologies sowing cotton seeds are analyzed. authors have developed method the crest irrigation its implementation, including working body fertilizer, shaper gasket comb attached hi...

The sealing system, as the most important load-bearing component, is a critical part of stack assembly in proton exchange membrane fuel cell (PEMFC). Currently, flat or single-peak gaskets are commonly used for large metal bipolar plate sealing, which can easily cause problems such significant internal stress and distortion displacement. In order to solve this problem, an innovative double-peak...

Underground pipelines are vital parts to urban water supply, gas and other lifeline systems, affecting the sustainable development of cities a great extent. The pipeline joint, which is weak link, may be seriously damaged during natural disasters such as earthquakes. failure pipe joints can cause leakage accidents, resulting in system interruption, even some secondary disasters. Herein, based o...