Baltimore County police arrested a U.S. Naval Academy midshipman today and charged him with second-degree rape in an alleged attack on an 18-year-old Goucher College freshman at a dance. Police said Michael D. Clemens, 19, in his second year at the academy, also was charged with a second-degree sex offense.

Police spokesman Jay Miller said Clemens, of Perry Hall, Md., was one of several midshipmen attending a dance Nov. 23 at the Towson women's college and apparently met the woman there and went for a walk with her in the early hours of the next day. The woman, who said she was attacked outside the college chapel, ran from the scene to report the incident, he said.

Clemens was charged with second-degree offenses, Miller said, because no weapons or threats to use weapons were involved in the alleged attack. Clemens was released under $20,000 bond.

Miller said the investigation took several days because the woman told investigators she knew her assailant only as Mike.

Academy spokesman Dennis Boxx said Clemens was on an authorized leave when the incident took place. He said the academy would begin its own investigation to see if administrative action should be taken against him, Boxx said.